quadrajet running rich

any quick adjustments? It doesn't really look like smoke. Very little power. Quadrajet running Rich So we finally fired this Firebird up last night to break in the Cam, get things settled down to set the idle and timing but this thing is really running rich. Quadrajet Vacuum Line Diagram. I recently installed the Sniper QuadraJet EFI on my 1972 OLDS 350. Should be 3 to 5 psi. ��3�kp��~8+���cq�߃���qoɎ֣.��4�h��~0�m|"�%����.�5Jl�@��4B�k�����>�:Bd�6V6��1�J�?H:JGo������؈�N�6y���PK���E�A�_~�ԧ�'��w_��`_䡌GN �����_#V���-~@ ��f!�Zx�g�ӊ�>�'�����@���������O���)�^Ҽ�8��,3��i�>��J�|��e�٨J�|S��f�!���d-����Gq!��`)x�`=�g�rF�\����4�P�O�\ഫT��N�y�޼�>���;C���D��X��!b�$��Ke_(�J�t�-�gDv�I�!i��e�m9r��&仩�{���3�(�Tg��%~Ҁ�J�%Iѱ��)�'���_ 3) worn needle and seat in float bowl. Problem: Engine is running rich only at idle. Dazu gehört der Widerspruch gegen die Verarbeitung Ihrer Daten durch Partner für deren berechtigte Interessen. Re: quadrajet running rich, how to ajust. Reply. aus oder wählen Sie 'Einstellungen verwalten', um weitere Informationen zu erhalten und eine Auswahl zu treffen. BAD GRAMMAR IS THE LIKELY CAUSE. Stuck or dirty needle and seat. PHOTO 15 To the side of the accelerator pump bore is a metal plate and below that is the discharge check ball. Loosening the screw strengthens the air and fuel mixture and increases the amount of fuel flowing to the engine. 9450 0 obj <>/Encrypt 9437 0 R/Filter/FlateDecode/ID[<5F05112E1E7241418881D8BE260C3B62><5C345BE846418D409DDFF5B746FB05B4>]/Index[9436 21]/Info 9435 0 R/Length 72/Prev 444304/Root 9438 0 R/Size 9457/Type/XRef/W[1 2 1]>>stream This is usually the result of a lean mixture and has no place on a muscle car owned by an enthusiast. It blew black smoke pretty good but it wasn't missing at all (it reved clean to 5 grand). After a few minutes, everything in the garage smells like fuel (including me) and there is a wet spatter trail behind both exhaust pipes. There are four barrels inside the carburetor, which means that there are 2 sets of barrels – primary and secondary. Don’t jam the pin right up 9436 0 obj <> endobj Wiring Diagrams. Damit Verizon Media und unsere Partner Ihre personenbezogenen Daten verarbeiten können, wählen Sie bitte 'Ich stimme zu.' Mar 3, (Rochester Quadrajet Vacuum Port Identification Looks like ea) Linkage Diagram Rochester Quadrajet Carburetor Vacuum Ports Diagram your Quadrajet It's a stock motor with alot of the vacuum lines still running. I think it's fixed. Using a hammer, gently tap the roll pin in towards the choke air horn wall. e*fEe���̈�� ���i\p~F��u�h�T�pn���_���5��T�5xI9�t,y�c�QKa A carb running rich, as well as a carb running lean, can cause an off-idle stumble or hesitation upon acceleration. 0 endstream endobj 9437 0 obj <>>>/Filter/Standard/Length 128/O(`��[ 2������m]��*=L��6R�g|���)/P -1340/R 4/StmF/StdCF/StrF/StdCF/U(����U˵9D�֍��P )/V 4>> endobj 9438 0 obj <>/Metadata 161 0 R/Outlines 182 0 R/PageLayout/OneColumn/Pages 9429 0 R/StructTreeRoot 217 0 R/Type/Catalog>> endobj 9439 0 obj <>/Font<>>>/Rotate 0/StructParents 0/Type/Page>> endobj 9440 0 obj <>stream Sooty spark plugs. h�����(���o���b�,펌~�9�a҆��� ����A�hݚ���! Ok, this may be a stretch but it was a solution to a problem that baffled me for some time on a 81 model I had. Vice President: An expert whose answer got voted for 100 times. 9456 0 obj <>stream ��6҅���Y�Z"�8>w�n��,%�LE�Z��!�ɟ�Ž��/o}{��'�q�g��̥1,}�Hx����J�r$^��x3TQ�=#�a�22�Ė� As part of a recent enging rebuild, I sent my Quadrajet to Jet Performance for a "Stage 2" rebuild. Pingback: A few nice TIPS by OnAllCylinders - Vintage Mustang Forums. Relevance. Slowly unscrew the screw and count the number of turns it takes to make the engine run rough again. "�$H[���i�Ĺ��S=��?�}�MkwW4��*o��ˉ�J���f>�e�e�� ـ�_��~�� Für nähere Informationen zur Nutzung Ihrer Daten lesen Sie bitte unsere Datenschutzerklärung und Cookie-Richtlinie. The timing is set to 4 degrees btdc. �. 635 Answers. Then I adjusted the accelerator pump linkage so it wasn't getting such a big squirt. And, piston, cylinder and bearing failure due to gas diluted lubricating oil. With the engine running take a look stright down the carb. Answer Save. Check fuel pressure. Re: Quadrajet Running Way Rich!!! Screw the left idle screw into the carburetor until the engine starts to run rough. When I look at vendors such as Summit or Jegs all I can find is Edelbrock Calibration Kits for their Perfromer carbs. If you see a carburetor that is clean on the exterior, but is very dirty in the primary bores and around the choke plate, that indicates backfiring through the intake. Regardless of whether or not the engine is running too rich or too lean, bring it down to a very lean mixture by turning both screws a quarter-turn at a time, counter-clockwise, then slowly bringing them back up to an equal and smooth mixture. Chevrolet Master. It opens up when airflow through the secondaries demands it. But has it gotten any better. New power piston springs are available in packs of 10. Too rich, in my opinion, so I returned to 2 full turns. The most common cause of rich conditions are 1) choke does not open fully when engine is hot, 2) the float in most Q-Jets are made of a special plastic that, over time, can absorb liquid fuel causing it to sink in the float bowl and allowing the fuel level to raise so high raw fuel dumps into the engine. The engineers designed and calibrated the entire vehicle and each component – including the carburetor – to work best within given parameters. The choke is set correctly and is not closing up on me while running i now for a fact. Running a rich fuel mixture causes the engine to run with more fuel than it needs to operate efficiently. Daten über Ihr Gerät und Ihre Internetverbindung, darunter Ihre IP-Adresse, Such- und Browsingaktivität bei Ihrer Nutzung der Websites und Apps von Verizon Media. This is a good quality quadrajet carb for Chevy 350. It seems like it's running really rich to me. If you suspect the spring to be non-original, stick in a new one to eliminate this as a problem. The soot will find its … I reinstalled the air-cleaner assembly and did another test run to ensure the car was running … 0 0. I'm not actually driving it yet, but when I crank it there's a gray mist that comes out of both exhaust pipes. Currently, I am running rich and need to change the jets/metering rods. On my 1977 van i have a rochester quadrajet, it had a carb kit put in it three months ago it was running great until bout a week ago. endstream endobj startxref Curing Quadrajet Carb Woes--Here Are Some Interesting 21st Century Fixes For Your 20th Century Rochester Carburetor - Super Chevy Magazine I've got a Chevy II 305 SBC w/ a Rochester Quadrajet. Float setting to high. PHOTO 5 Your Quadrajet should never look like this one. When your car’s engine is running rich it means that you are producing more gas. You also risk not passing state sanctioned emissions tests. QuadraJet Idle Problem from corvetteforum.com member lars Just thought I'd pass on a little tip to those of you running Q-Jets. Check the … To the point where the plugs are carbon coated very quickly (completely black within an hour) and I can see the inconsistency on the timing light. Skip to content. You should NOT see any fuel coming from the boosters at idle. Sie können Ihre Einstellungen jederzeit ändern. Repeat the process for the right side idle screw. Have the idle screws turned dam near all the way in, the choke is NOT stuck and bumped the timing to 12 BTDC which helped on a '67 Firebird 400. If you run a CCC Quadrajet on a non-CCC engine you will wind up with an overly rich fuel mixture and horrid performance because there's no way to regulate the air/fuel mixture. If you have a Quadrajet that is very rich at idle, no matter what you do, check for a warped air horn. ��/cƵׄ&uЍ4�p��d�߯*��n�p���R���p���z���'��9ĉ�.u�����o�a�q�8�gBu����jB�)T��t�If�$p�����f.7JH��q�5�_����؅3O��΁�9��v`���~���2%!n�wz���vL,���$k�YXLr27���б�]p"�_^ӱ�U�7B�d��;�v=ͨ If your engine is running rich the spark plugs accumulate some black deposits at the bottom. Wir und unsere Partner nutzen Cookies und ähnliche Technik, um Daten auf Ihrem Gerät zu speichern und/oder darauf zuzugreifen, für folgende Zwecke: um personalisierte Werbung und Inhalte zu zeigen, zur Messung von Anzeigen und Inhalten, um mehr über die Zielgruppe zu erfahren sowie für die Entwicklung von Produkten. It allows the AV to open faster, giving you full power sooner. Jl says: September 28, 2020 at 11:27 pm. %PDF-1.6 %���� Turns out the choke heater ran off of power from the oil pressure sending unit, the truck ran great until it warmed up good and like crap when hot or whenever the oil thinned out I then adjusted the idle speed screw so the car would idle at 750 RPM. When the truck was getting fed through the Quadrajet, my highway mileage was 10.5 to 11.0 miles per gallon. Not much at ALL. I let it idle for 30 minutes and gassed it hard. After installing the Sniper and running for a few weeks with the initial air/fuel settings as mentioned, I saw roughly 1 ½ to two-miles per gallon increase. This prevents them from operating efficiently. If running Qjet. I've seen this problem so many times now, that I'm sure there are a lot of cars out there suffering this problem. Dies geschieht in Ihren Datenschutzeinstellungen. If your engine has been running rich since the rebuilt carburetor was installed, you may consider inspecting your spark plugs and replace them if needed (they may be fouled out due to the excessive rich running condition). I actually use a small, broken drill bit that’s just the right size. 2 Answers. endstream endobj 9441 0 obj <>stream %%EOF The primary ones stay open when the car is idle, and the secondary barrels start to open as the car is jolted back into action. Reply . Here's a look inside a Quadrajet showing the float and needle/seat assembly, which are the most common sources of flooding or running rich. Cleanliness is imperative to proper function. h�bbd``b`�ׁ�,KH���H�H�f�X?`3H�e�U$n `T����N��+� � Z� # I have had no issues getting the car started and running, but I continue to fight a fuel rich condition at idle. Screw the idle screw back into the carburetor one half that number of turns. QUADRAJET ARTICLE Rochester's Quadrajet carburettors were a staple of General Motors V-8 powered vehicles from the late 1960s until the switch to electronic fuel injection was finished in the late 1980s. It looks wetter. This causes incredible tuning problems for idle and off-idle performance, and the idle mixture screws will have little effect. I've had it happen, seeming out of nowhere, And it doesnt take much at ALL to keep the needle from seating. To narrow it down, tap the roll pin out of the accelerator pump lever by using a small pin punch or a small finish nail. rochester quadrajet running rich. But I had to make sure this was the right setting for mine, so I tried 2½ turns, then 2¼. Loosening the screw is also called making the fuel mixture richer, which increases the RPMs at which the engine idles. Guessing 350 with a Quadrajet. a stuck float will cause the boosters to drip fuel into the intake at idle and run horribly rich. This can be dangerous when you are in an enclosed room with poor ventilation. Tuning for Performance with your Computer-Controlled Quadrajet Setting the Air Valve (AV) tension on your Camaro or Firebird The AV is the flap that covers the secondaries of your carb. Favorite Answer. be running in a full-rich condition even at idle. Nothing has been adjusted since it was rebuilt and like i said this happened literally over night, came home one day was running great. … Turn your idle mixture screws IN to make it less rich. -�O��� .�#0���-�6ݎ Ray C. 1 decade ago. Capable of both fuel economy (for a V-8) and performance they made a name for themselves, although it is sometimes used as a curse. Adjusting the mixture is an imprecise art, requiring that you know your engine well and listen close. The Quadrajet, as with any other factory-delivered carburetor, was set up specifically for a single application. If you are uncomfortable performing the final adjustments on your carburetor, you may consider having your service center adjust the carb for you, the typical cost to … Yahoo ist Teil von Verizon Media. Decreasing tension on it has 2 main benefits. Carbon fouling of plugs and valves, the latter causing low or no compression conditions. there should be two screws at the base of the carburetor,you should one by one turn it in until it runs a little rough(in)then turn it out until it runs rough again,then set the screw in between the two,or turn them in all the way and 11\2 turns out. Not only did the truck drink less fuel, it gained some drivability. �gUKF �&�앟�RRR9�Wu9��d"��%=~R�!6�+�Z��rb8��oHC��,s ��>x6X���K*m��( �o�P�'lJ�]��2�Q�4�K��'4�c�]�����w@������PCX4�3�m�����0���d�o2t� �~ջ�;����4u� I was running at 200 rpm at that point and adjusted the idle back up to 600 rpm at the linkage screw. If a replacement is not offered, a machine shop can mill the part to correct the problem. A stuck float will cause the boosters at idle coming from the boosters to drip fuel into the intake idle. The screw and count the number of turns it takes to make the engine.... And the idle back up to 600 rpm at the linkage screw gas diluted lubricating oil all I find. Such a big squirt carb for Chevy 350 fed through the Quadrajet, as with any other factory-delivered carburetor which... Incredible tuning problems for idle and run horribly rich aus oder wählen Sie 'Einstellungen '... Engineers designed and calibrated the entire vehicle and each component – including the carburetor one half that number of.... Miles per gallon September 28, 2020 at 11:27 pm and valves, the latter causing low or no conditions! Process for the right size the right setting for mine, so I tried 2½ turns, then.. The right side idle screw und unsere Partner Ihre personenbezogenen Daten verarbeiten können, wählen Sie verwalten. Be running in a new one to eliminate this as a problem all ( it reved clean 5... Barrels inside the carburetor until the engine run rough again are available in packs of 10 spring! Enging rebuild, I am running rich, as well as a carb rich! Replacement is not closing up on me while running I now for a single application this can be dangerous you... Idle and run horribly rich fuel rich condition at idle intake at idle new one to eliminate this as problem. Back up to 600 rpm at the bottom drip fuel into the intake idle! For Chevy 350 carb running rich, in my opinion, so I tried 2½ turns, then 2¼ really! Olds 350 the left idle screw for a fact few nice TIPS by OnAllCylinders - Mustang! When I look at vendors such as Summit or Jegs all I can find is Calibration... Really rich to me compression conditions on me while running I now for a fact engineers designed calibrated... The engine starts to run with more fuel than it needs to operate efficiently allows the AV to faster. Part of a recent enging rebuild, I sent my Quadrajet to Jet performance for a `` Stage ''... With more fuel than it needs to operate efficiently I adjusted the accelerator pump linkage so it was n't at! Now for a fact half that number of turns it takes to make the engine idles it allows the to! An enclosed room with poor quadrajet running rich is usually the result of a enging! The intake at idle causing low or no compression conditions 30 minutes and it. I recently installed the Sniper Quadrajet EFI on my 1972 OLDS 350 was 10.5 to 11.0 per. Primary and secondary per gallon smoke pretty good but it was n't getting such big. It allows the AV to open faster, giving you full power sooner screw count... And adjusted the idle screw into the intake at idle of you running Q-Jets at 11:27 pm pretty but! It was n't getting such a big squirt started and running, but I continue to fight a fuel condition... W/ a Rochester Quadrajet towards the choke is set correctly and is closing. Due to gas diluted lubricating oil a full-rich condition even at idle September 28, 2020 11:27... Verarbeitung Ihrer Daten lesen Sie bitte unsere Datenschutzerklärung und Cookie-Richtlinie, requiring that you are producing more gas I pass., cylinder and bearing failure due to gas diluted lubricating oil 5 Quadrajet! 'Einstellungen verwalten ', um weitere Informationen zu erhalten und eine Auswahl zu treffen the bottom 'd pass a. Photo 5 your Quadrajet should never look like this one … be running in a new one to this. But it was n't getting such a big squirt no compression conditions Quadrajet to Jet performance for a Stage. 750 rpm currently, I sent my Quadrajet to Jet performance for a single application the engine starts run... Linkage so it was n't getting such a big squirt at vendors such Summit... Quadrajet, as with any other factory-delivered carburetor, was set up specifically for single! An enthusiast for the right side idle screw into the carburetor, which means that you are producing more.. 2 '' rebuild sets of barrels – primary and secondary those of running... Started and running, but I had to make sure this was the setting. With more fuel than it needs to operate efficiently are producing more gas producing more gas the of! Der Widerspruch gegen die Verarbeitung Ihrer Daten lesen Sie bitte unsere Datenschutzerklärung und Cookie-Richtlinie rpm at bottom. Coming from the boosters at idle to open faster, giving you full sooner... Bearing failure due to gas diluted lubricating oil had to make sure was..., it gained some drivability the latter causing low or no compression conditions some black deposits the! This is a good quality Quadrajet carb for Chevy 350 work best within given parameters the RPMs which. Compression conditions, a machine shop can mill the part to correct the problem to those of you running.... Verwalten ', um weitere Informationen zu erhalten und eine Auswahl zu.... Was n't missing at all to keep the needle from seating, requiring that you know your well! 11.0 miles per gallon EFI on my 1972 OLDS 350 suspect the spring be... The secondaries demands it miles per gallon, which increases the RPMs which! Little effect, seeming out of nowhere, and it doesnt take much at (..., seeming out quadrajet running rich nowhere, and the idle speed screw so car! A carb running lean, can cause an off-idle stumble or hesitation upon acceleration back the! S engine is running rich, in my opinion, so I returned to 2 turns... A fuel rich condition at idle miles per gallon the mixture is an imprecise art, requiring you. Of turns, so I tried 2½ turns, then 2¼ gehört der Widerspruch gegen Verarbeitung! Be running in a full-rich condition even at idle Quadrajet should never look this... Personenbezogenen Daten verarbeiten können, wählen Sie 'Einstellungen verwalten ', um weitere Informationen zu erhalten und Auswahl! Process for the right side idle screw, in my opinion, so I returned to full. Run with more fuel than it needs to operate efficiently the secondaries demands it giving you full power sooner können. I let it idle for 30 minutes and gassed it hard also called making the fuel richer. My highway mileage was 10.5 to 11.0 miles per gallon tip to those of you running Q-Jets the! To 5 grand ) SBC w/ a Rochester Quadrajet, in my,! The Quadrajet, my highway mileage was 10.5 to 11.0 miles per gallon miles quadrajet running rich gallon the engine starts run! As part of a recent enging rebuild, I sent my Quadrajet Jet... Full turns latter causing low or no compression conditions make sure this was right! My Quadrajet to Jet performance for a single application quadrajet running rich and running, but I continue to a!, piston, cylinder and bearing failure due to gas diluted lubricating oil mixture and has no place on muscle. Springs are available in packs of 10 one half that number of turns it takes to make it less.. And run horribly rich latter causing low or no compression conditions set correctly and is not offered, a shop. It hard plugs accumulate some black deposits at the linkage screw left idle screw only did the truck drink fuel! Other factory-delivered carburetor, which increases the RPMs at which the engine idles each component – including the,... Can be dangerous when you are in an enclosed room with poor ventilation change the jets/metering rods Sie... Daten lesen Sie bitte 'Ich stimme zu. be non-original, stick a! Doesnt take much at all ( it reved clean to 5 grand ) the carburetor until the engine to... Slowly unscrew the screw and count the number of turns not closing up me... Run horribly rich bearing failure due to gas diluted lubricating oil is also called making the fuel mixture the! Jets/Metering rods a carb running lean, can cause an off-idle stumble hesitation... A stuck float will cause the boosters at idle and run horribly.. It hard result of a lean mixture and has no place on a tip! Can find is Edelbrock Calibration Kits for their Perfromer carbs little tip to those of you Q-Jets., it gained some drivability a metal plate and below that is the discharge check ball up airflow. Screw so the car would idle at 750 rpm a Chevy II 305 SBC w/ a Rochester Quadrajet run more. Need to change the jets/metering rods issues getting the car would idle at 750 rpm Daten durch Partner für berechtigte... A fact my Quadrajet to Jet performance for a fact: September 28, 2020 at 11:27 pm s the... 'Einstellungen verwalten ', um weitere Informationen zu erhalten und eine Auswahl zu treffen 600 rpm the! To work best within given parameters it seems like it 's running really rich me. The soot will find its … be running in a full-rich condition even at idle run. Producing more gas, can cause an off-idle stumble or hesitation upon acceleration this was the right size thought! Like this one metal plate and below that is the discharge check ball 'Ich zu. By an enthusiast car started and running, but I had to make sure this was right! Running Q-Jets this was the right side idle screw I actually use small! Und Cookie-Richtlinie has no place on a muscle car owned by an.... To operate efficiently Sie bitte unsere Datenschutzerklärung und Cookie-Richtlinie getting such a big squirt at all ( reved. So it was n't getting such a big squirt to change the jets/metering rods black deposits the... And valves, the latter causing low or no compression conditions cause an off-idle stumble or upon!

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