2.5L / 4 Cylinder / 1991 Jeep Wrangler: Cranks just fine but attempts to stall out as I accelerate. Have had Tune-Up performed; Throttle Body Cleaned, and have NEW Fuel Pump, Fuel Filter, Distributor Cap, Rotary Button, Plug Wires, & Fuel Regulator , installed but the problem seems to be getting worse rather than better. I'm running out of money, time, & patience. PLEASE HELP
Very good possibility, they had issues with them, without hooking it up to scan tool educated guess, with all the money spent on replacing parts could of paid a diag fee at a jeep dealership...
Thanks for your reply - Out-of-luck when it came to locating a Jeep dealership here; I'm out in the middle of nowhere! Someone else suggested checking for a minor vacuum leak (which has been done), AND checking map sensor, pcv, egr valve (whatever that is). Sorry, I'm not a mechanic, just a victim & need help.
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Sound like ignition timing off.have timing checked.
SOURCE: Engine revs up and down, hesitates with slow take
change your throttle positionig sensor its going bad
SOURCE: 1998 chevy vortec v8 stops accelerating at 3000
Have you checked all your vacuum lines. One may have rotted and has a hole sucking in more air then needed messing up the air fuel mixture. Take a can of carburetor cleaner and while the engine is running spray short bursts around the carb and theintake manifold and where any little black hose lines are hooked up.If the engine revs up in rpms then it has an intake leak sucking in air where its not supose too.
This will cause power loss. Also check your air filter to make sure it is not plugged up. Ihope this helps, The Raz
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