Engine Performance problem
1989 Dodge Van V8 Two Wheel Drive Automatic 100, 00 miles
Thank you for taking the time to answer my question. The main concern is the carburetor backfire problem. I will list the symptoms in a timeline order. I do not know which of these symptoms will identify what is causing the problem, so I will list them all and hopefully you will have the information that you need.
In the morning, the engine starts and idles somewhat poorly. The Idle Control Motor will constantly click back up about each 3 seconds to maintain a consistent idle. At that time when the engine is cold, the engine actually drives relatively well. Again, when the engine is cold it idles poorly but runs on the highway the best. Once the engine warms up about 15 minutes later, then it idles good, but the carburetor frequently backfires during take off and turns. There is definetly a connection between the tempeture of the engine and the carberator backfire. When I accelerate from a stop then almost always the carburetor backfires. I can over accelerate to get past the point where the carburetor backfires. When taking off from a stop I will tape the gas peddle once or twice to make the engine accelerate smoothly. When driving down the road under around 35 MPH, the engine sometimes feels like it jerks and bogs down a little, when that happens I pump the gas peddle once or twice and the engine goes back to normal. When I drive down the highway around 40/45 MPH and come to a stop, then the engine will stall. It does start right back up. When I drive on the freeway the engine seems to run at its best except for the jerking or bogging down feeling. When I drive up hill or over 40 then the check engine light usually comes on. The main thing is when the carburetor backfires from accelerating at a stop, which the engine will stall if the carburetor backfires.
I have performed some maintenance such as new plugs and wires. New valve cover gasgets, Check for and fixed a few vacuum leaks. Taken off the carburetor and cleaned it and the fuel injectors very well. I fixed the cooling system, belts, etc, etc, etc. Some of the repairs have helped the engine performance, but nothing has made any difference in the carburetor backfire.
For the record, the engine is a 5.2 with a duel fuel injector Throttle Body Injector(not a carburetor). What I am hoping for is a specific answer. For example, instead of saying replace the TBI, maybe someone will know if I can just replace the fuel regulator, injectors, or EGR.
Thank you again for your time.
have the same problem?
Monday, April 5th, 2010 AT 11:57 AM