Its sputtering real bad
Didnt specify year if no codes check and or replace fuel fuel filter -check and clean egr valve---if idles higher than normal also check for vacuum leak
Is the check engine light on ?
Have you checked the fuel pressure yet ?
SOURCE: Chevy S10 Pick 1995 - Sputters and almost stalls when accelerating.
You could have a dirty EGR valve, you can re move it from the manifold and clean it with Throttle body cleaner. Might as well buy two cans, since your cleaning the EGR, might as well clean out the throttle body too.
Spray the throttle body cleaner in to the throttle body with the engine running and try to keep it at 1000 rpm and then to 1500 rpm as you clean out the throttle body and let it idle down for 2 min then turn the engine off. Then turn the engine to the run position for 10 seconds and start and let idle, ro for a test drive and hope that solved the problem, if not there a few more things we can do which will consist for tune up.
Note: Clean the EGR first so you don't burn your self since the engine would still be cool before you clean the Throttle body.
Good luck and keep me posted.
SOURCE: Chevy Blazer won't start; fuel pump needs replacing
Before spending several hundres on a fuel pump, I recommend doing a fuel pressure test. You can get a test gauge pretty cheap at a parts store. If the pump is junk, you raise the truck, lower the fuel tank, unplug the electronics from the pump at the top of the tank, then with a hammer and flat head scrwedrive, gently tap the lock ring in a counter clockwise direction until it pops off. Pull the pump assembly out and install the new one. Reverse directions to install.
SOURCE: my 2006 chevy cobalt 2.2 liter sputters
Fault with the IAC valve.there maybe a trouble code associated with it also./ Go to your nearby autozone or auto parts retailer and ask them to put a scanner to the car....make note of the codes if any are found. the IAC valve i usually locate don the throttle body and can be removed for inspection and sometimes cleaning using a good throttle body cleaner spray and a pipe cleaner brush.
SOURCE: 94 s10 blazer 4.3 vortec,idles pretty good when
check your idle sensor. or it can be the sensor thats hooked up on your catconverter. or a pluged cat conveter
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