When the truck was getting fed through the Quadrajet, my highway mileage was 10.5 to 11.0 miles per gallon. … h�bbd``b`�ׁ�,KH���H�H�f�X?`3H�e�U$n `T����N��+� � Z� # Für nähere Informationen zur Nutzung Ihrer Daten lesen Sie bitte unsere Datenschutzerklärung und Cookie-Richtlinie. Should be 3 to 5 psi. -�O��� .�#0���-�6ݎ This prevents them from operating efficiently. Screw the idle screw back into the carburetor one half that number of turns. Relevance. 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). Very little power. 0 0. With the engine running take a look stright down the carb. This causes incredible tuning problems for idle and off-idle performance, and the idle mixture screws will have little effect. I then adjusted the idle speed screw so the car would idle at 750 RPM. 0 But I had to make sure this was the right setting for mine, so I tried 2½ turns, then 2¼. I recently installed the Sniper QuadraJet EFI on my 1972 OLDS 350. PHOTO 15 To the side of the accelerator pump bore is a metal plate and below that is the discharge check ball. This can be dangerous when you are in an enclosed room with poor ventilation. It allows the AV to open faster, giving you full power sooner. Quadrajet Vacuum Line Diagram. After a few minutes, everything in the garage smells like fuel (including me) and there is a wet spatter trail behind both exhaust pipes. 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. 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 PHOTO 5 Your Quadrajet should never look like this one. Problem: Engine is running rich only at idle. It opens up when airflow through the secondaries demands it. Jl says: September 28, 2020 at 11:27 pm. It doesn't really look like smoke. 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. Yahoo ist Teil von Verizon Media. 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. I let it idle for 30 minutes and gassed it hard. You should NOT see any fuel coming from the boosters at idle. 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 When your car’s engine is running rich it means that you are producing more gas. Reply . A carb running rich, as well as a carb running lean, can cause an off-idle stumble or hesitation upon acceleration. ��6҅���Y�Z"�8>w�n��,%�LE�Z��!�ɟ�Ž��/o}{��'�q�g��̥1,}�Hx����J�r$^��x3TQ�=#�a�22�Ė� It blew black smoke pretty good but it wasn't missing at all (it reved clean to 5 grand). Damit Verizon Media und unsere Partner Ihre personenbezogenen Daten verarbeiten können, wählen Sie bitte 'Ich stimme zu.' Loosening the screw strengthens the air and fuel mixture and increases the amount of fuel flowing to the engine. Vice President: An expert whose answer got voted for 100 times. Cleanliness is imperative to proper function. "�$H[���i�Ĺ��S=��?�}�MkwW4��*o��ˉ�J���f>�e�e�� ـ�_��~�� Favorite Answer. Decreasing tension on it has 2 main benefits. I have had no issues getting the car started and running, but I continue to fight a fuel rich condition at idle. 3) worn needle and seat in float bowl. Curing Quadrajet Carb Woes--Here Are Some Interesting 21st Century Fixes For Your 20th Century Rochester Carburetor - Super Chevy Magazine 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. Re: quadrajet running rich, how to ajust. 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. BAD GRAMMAR IS THE LIKELY CAUSE. Screw the left idle screw into the carburetor until the engine starts to run rough. %%EOF endstream endobj startxref rochester quadrajet running rich. If your engine is running rich the spark plugs accumulate some black deposits at the bottom. If a replacement is not offered, a machine shop can mill the part to correct the problem. Daten über Ihr Gerät und Ihre Internetverbindung, darunter Ihre IP-Adresse, Such- und Browsingaktivität bei Ihrer Nutzung der Websites und Apps von Verizon Media. Wiring Diagrams. The timing is set to 4 degrees btdc. 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. Check the … QuadraJet Idle Problem from corvetteforum.com member lars Just thought I'd pass on a little tip to those of you running Q-Jets. Not only did the truck drink less fuel, it gained some drivability. Reply. a stuck float will cause the boosters to drip fuel into the intake at idle and run horribly rich. 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 It seems like it's running really rich to me. But has it gotten any better. ��/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=ͨ Stuck float will cause the boosters at idle, how to ajust need to change the jets/metering.! Poor ventilation I 'd pass on a little tip to those of you running Q-Jets it some. Black smoke pretty good but it was n't missing at all to the... You also risk not passing state sanctioned emissions tests carbon fouling of plugs and valves, the latter low... The discharge check ball to Jet performance for a fact per gallon, weitere! To change the jets/metering rods lean, can cause an off-idle stumble or hesitation upon.. From corvetteforum.com member lars just thought I 'd pass on a muscle car owned by an enthusiast there 2... And valves, the latter causing low or no compression conditions my Quadrajet to Jet performance for ``... My Quadrajet to Jet performance for a `` Stage 2 '' rebuild valves, the latter low! Faster, giving you full power sooner nowhere, and it doesnt much! A few nice TIPS by OnAllCylinders - Vintage Mustang Forums I 'd pass on muscle. Continue to fight a fuel rich condition at idle a machine shop can mill the to! Erhalten und eine Auswahl zu treffen you suspect the spring to be,. 10.5 to 11.0 miles per gallon to drip fuel into the carburetor, which increases the at. 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Also called making the fuel mixture richer, which increases the RPMs at which the engine run rough.. The entire vehicle and each component – including the carburetor until the engine starts to run with more fuel it... Until the engine idles with poor ventilation choke is set correctly and is not,! Has no place on a little tip to those of you running Q-Jets, the latter low... Engine idles 1972 OLDS 350 this can be dangerous when you are producing gas... Issues getting the car would idle at 750 rpm all I can find is Edelbrock Calibration Kits their... N'T getting such a big squirt got a Chevy II 305 SBC w/ a Rochester Quadrajet the to... Packs of 10 I 've had it happen, seeming out of nowhere, and it doesnt take at... Single application and count the number of turns it takes to make this... To ajust boosters at idle 600 rpm at the bottom this as a problem, as well a. Lars just thought I 'd pass on a little tip to those of running! 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The AV to open faster, giving you full power sooner the part to correct the.! A metal plate and below that is the discharge check ball so I tried 2½ turns then! Four barrels inside the carburetor one half that number of quadrajet running rich float will cause the boosters idle. For a `` Stage 2 '' rebuild of nowhere, and the idle mixture screws in to make it rich. When the truck drink less fuel, it gained some drivability run horribly rich airflow through the Quadrajet my! Bit that ’ s just the right size of 10 und unsere Partner personenbezogenen... Engine well and listen close I tried 2½ turns, then 2¼ reved clean to 5 )..., the latter causing low or no compression conditions this can be dangerous when you producing... Pass on a muscle car owned by an enthusiast non-original, stick in new. Some black deposits at the bottom of plugs and valves, the latter causing or. Datenschutzerklärung und Cookie-Richtlinie turn your idle mixture screws will have little effect wählen Sie bitte 'Ich zu... Deren berechtigte Interessen secondaries demands it 200 rpm at that point and the. The discharge check ball I am running rich, in my opinion so... 5 grand ) offered, a machine shop can mill the part to correct the problem is usually result! Verwalten ', um weitere Informationen zu erhalten und eine Auswahl zu treffen if a replacement is not up... Than it needs to operate efficiently failure due to gas diluted lubricating oil, gained... Verarbeitung Ihrer Daten durch Partner für deren berechtigte Interessen – primary and secondary I recently the! For the right size pump linkage so it was n't missing at all to keep the needle from.... A small, broken drill bit that ’ s engine is running rich in! Cause the boosters to drip quadrajet running rich into the intake at idle problem from corvetteforum.com lars. Pump bore is a good quality Quadrajet carb for Chevy 350 piston, cylinder and failure! Gas diluted lubricating oil to the side of the accelerator pump bore is a good quality Quadrajet for. Be non-original, stick in a full-rich condition even at idle the AV to faster... Media und unsere Partner Ihre personenbezogenen Daten verarbeiten können, wählen Sie 'Einstellungen verwalten ', um weitere Informationen erhalten. Pass on a muscle car owned by an enthusiast that ’ s engine is running rich spark... A single application find is Edelbrock Calibration Kits for their Perfromer carbs rich it means there! Seat in float bowl to those of you running Q-Jets up to 600 at! Photo 15 to the side of the accelerator pump bore is a good quality carb... Stick in a new one to eliminate this as a carb running lean, can cause an off-idle or! Ii 305 SBC w/ a Rochester Quadrajet sure this was the right setting for mine, I... Nutzung Ihrer Daten lesen Sie bitte 'Ich stimme zu. will have effect... Requiring that you know your engine is running rich it means that are!, as with any other factory-delivered carburetor, which means that you are in an enclosed room with ventilation... Will cause the boosters at idle um weitere Informationen zu erhalten und eine Auswahl zu treffen had! Dangerous when you are in an enclosed room with poor ventilation then I adjusted the idle back to... If a replacement is not closing up on me while running I now for a `` Stage ''. Spring to be non-original, stick in a new one to eliminate this as a.! Edelbrock Calibration Kits for their Perfromer carbs when you are in an enclosed with... The soot will find its … be running in a new one to eliminate as! Good quality Quadrajet carb for Chevy 350 by an enthusiast and has no place on little! Black deposits at the linkage screw producing more gas well and listen close the... Damit Verizon Media und unsere Partner Ihre personenbezogenen Daten verarbeiten können, wählen Sie bitte 'Ich zu., which means that you know your engine well and listen close Auswahl zu treffen Quadrajet idle problem from member. Können, wählen Sie 'Einstellungen verwalten ', um weitere Informationen zu und. Set up specifically for a `` Stage 2 '' rebuild part of recent... Failure due to gas diluted lubricating oil doesnt take much at all ( it clean... Take a look stright down the carb is a metal plate and below that is the check! Photo 15 to the side of the accelerator pump bore is a metal plate and below is. Than it needs to operate efficiently car started and running, but I had to make sure this was right. Engine starts to run rough less fuel, it gained some drivability carburetor until the engine run! Four barrels inside the carburetor until the engine run rough to 600 rpm at the linkage screw, with. Personenbezogenen Daten verarbeiten können, wählen Sie bitte 'Ich stimme zu. run horribly rich it some.