I have a 99 chevy s10 and It is making a noise at the back of the engine sounds like a chain is slinging around when rpms are above 3ish. It is also accelerating funny it loses acceleration when rpms are higher then 3 rpms... any ideas?

SOURCE: Engine Making Noise when accelerating

Could be carbon build-up on the pistons, causing erratic flame travel in the combustion chamber... 'pinging'...... Decarbon the engine and use a high grade fuel for a few tanks.... also an octane booster can help

mac mcknight

• 26 Answers
• Posted on Dec 27, 2008

SOURCE: Engine running really rough...whine sound when it isn't.

The run rough problem is due a cyl.mis firing,it becaused buy a bad plug,plug wire,coil,or even the ing.module. the servive eng.light flashing is warning you that you have a cyl.misfire that can cause damaget to your catltic converter if you continue to drive it.with may lead to why you think you have a exhaust problem,it may be colgged.

SOURCE: '99 Forester with a knocking noise at idle and acceleration

sounds like you have a headgasket blown, a head, or your rocker arms or lifters whatever you prefer to call them are running dry. might be time for oil change and coolant flush. If ther is no overheating or coolant smell than get your injectors checked. You might just have a broken seal that emits louder sound from the pulsating injectors. Good Luck!

Harvey N Tawatao

• 3854 Answers
• Posted on Jun 01, 2009

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.