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Simple post complete 4bbl adjustments for rochester.....!!!!!! 1984 gmc 305ci rochester 4bbl carb adjustments (pickup has NO polution on it at all) (also no sealed adjustment screws. PLEASE!

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Most of my experences they are like 10 oclock 2 oclock.

Posted on Mar 20, 2011

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How do you set the idle


There are all kinds of adjustments on that vehicle. Also, it depends on which carburetor it is equipped with. That vehicle came with a Rochester 2-barrel carb, a Rochester Quadrajet carb, or a Holley 4- barrel carb. There is not enough time or space to post all of the information about this here. I would recommend going to alldatadiy.com and subscribing to the service information for your vehicle for a small annual fee, or purchacing a manual like Chilton or Haynes.

May 18, 2012 | 1987 Chrysler Fifth Avenue

1 Answer

Need an emissions schamatic for my 1984 K10 silverado 305 engine


Unfortunately, there are 13 variations for this engine and year. Was this truck sold or modified for high altitude? Was it sold in California or modified to meet the CA emission standards? Does it have a manual or auto transmission? After narrowing down based on answers to these questions, there are still alternative configurations depending on the particular equipment, so look carefully at the diagrams to see which components are used on your engine. Sometimes you can match the 3 letter code for the diagram to letters in the VIN or a sticker in the engine compartment. Please let me know if you have questions.


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Fig. Fig. 49: 1984 305 (5.0L) V8 engine-4bbl federal and low altitude with automatic transmission

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Fig. Fig. 50: 1984 305 (5.0L) V8 engine-4bbl federal and low altitude with automatic transmission alternate

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Fig. Fig. 51: 1984 305 (5.0L) V8 engine-4bbl federal and high altitude with automatic transmission

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Fig. Fig. 52: 1984 305 (5.0L) V8 engine-4bbl federal and high altitude with automatic transmission alternate

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Fig. Fig. 53: 1984 305 (5.0L) V8 engine-4bbl federal and high altitude with manual transmission

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Fig. Fig. 54: 1984 305 (5.0L) V8 engine-4bbl federal and high altitude with manual transmission alternate

jturcotte_2432.gif

Fig. Fig. 55: 1984 305 (5.0L) V8 engine-4bbl federal and low altitude with manual transmission

jturcotte_2433.gif

Fig. Fig. 56: 1984 305 (5.0L) V8 engine-4bbl federal and low altitude with manual transmission alternate

jturcotte_2434.gif

Fig. Fig. 57: 1984 305 (5.0L) V8 engine-4bbl federal and low altitude with manual transmission alternate

jturcotte_2435.gif

Fig. Fig. 58: 1984 305 (5.0L) V8 engine-4bbl federal and low altitude with automatic transmission alternate

jturcotte_2436.gif

Fig. Fig. 59: 1984 305 (5.0L) V8 engine-4bbl federal and high altitude with automatic transmission alternate

jturcotte_2437.gif

Fig. Fig. 60: 1984 305 (5.0L) V8 engine-4bbl federal and low altitude with automatic transmission alternate

jturcotte_2438.gif

Fig. Fig. 61: 1984 305 (5.0L) V8 engine-4bbl federal and high altitude with automatic transmission alternate

Oct 27, 2011 | Cars & Trucks

1 Answer

What kind of carburter do I need for a 1984 firebird


If you have the original engine, likely it's a Quadrajet if it's 4bbl, or another possibility is a Rochester 2gc. The Quadrajet is a modified version with a purge valve solenoid and a throttle position sensor built into it. (funny to see your post because I just took one off a Montecarlo this morning....did a vorteck head swap, cam, high perf. intake, headers and a way larger Holley carb)

Apr 12, 2011 | 1984 Pontiac Firebird

1 Answer

Where is the fuel filter on 1984 Silverado 4x4 pickup with a 305 cid?


If you have the original quadrajet carb it has a small inline fuel filter located on the front of the carb. This applies to both 2bbl and 4bbl 500-650 cfm carbs

Feb 16, 2011 | Chevrolet Silverado Cars & Trucks

1 Answer

My 1986 GMC Vandura With a 305 and rochester Q Jet Idles Rich and after it warms up looses power and floods out stalling where ever it feels like. Please Help,


Possibly a hole in the float . ( carburator) You'll have to take the carb apart and remove the float. Shake it and see if there is gas in it. If it's not a brass float, you may just need to adjust it, and clean the carb.

Dec 17, 2010 | 1984 GMC VanDura

1 Answer

Trying to order a replacement carb for 1984 F150 with a 302. They ask what make the carb is and number. Problem is the original carb was removed and replaced with a 4 barrel. Trying to buy 2 barrel but...


I have ran into this frequently.1984 ford,if it is a california vehicle,had a feedback carb.(electronic feedback control) with a computer. and they had 49 state vehicles. The 49 state vehicle is not electronic feedback. if the intake has been changed, it's going to be hard finding the right carb for it. a 2bbl won't fit a 4bbl manifold. Holly carb makes a replacement carb to fit many vehicles. check with your local auto parts person. they should be able to help you, or find one in the wrecking yard with everything to swap it out.

Oct 07, 2009 | 1984 Ford F 150

1 Answer

I have a 1981 GMCvandura 25 with a 350 4bbl carb. the choke.


Its all in the idle screws, if there bad you will be chasing them every time you drive it, also the choke spring inside could be bad, if you have a that style. screw the idle in on both sides all the way in, then back out 2 and a half turns, this should be where you will run the best. adjust as needed, but that is the standard. i also run sea foam through the carb, alot better then any cleaner on the market. usr it in your fuel or try to put it in the carb, i have uesd the vacume lines to do this, but you will also have to keep the car at high idle when doing this, it will clean all of the junk and carbon out of the entire motor.

if you need more help, please be clear or the carb, and hat you have done and not done already'

thanks

Feb 02, 2009 | 1984 GMC VanDura

1 Answer

Stock horsepower - 1984 GMC C3500


I own a shop, and build a lot of these engines. I have a race car & truck in which I built, so horsepower is something I know a little about. Most of these engines are rated around 190 - 200 horses, but when put on a dyno can be as much as 225, or as little as 175 or 180. Since its a truck engine it has more torque than an engine that was put in a car, and it also should be a four bolt main engine. The good thing about this engine is; One can get a lot more out of these with a little work. Matter of fact, its not that hard, or expensive to see as much as 400 horses from that engine, when rebuilt with some high performance parts. One can add just a few things such as headers, good intake, dual exhaust, flowmaster mufflers, and a better igniton system, and hit 300 - 325 pretty easily. Glad to help out, Good Luck!!!

May 18, 2008 | 1992 GMC Sierra C3500

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