We've checked, cleaned, and replaced (when needed) everything from the air intake filter, to the Mass Air-flow sensor, to the Oxygen sensor, cleaned the injectors, changed the fuel filter (fuel pump works fine), changed spark plugs and hi-tension wires... but still experience sluggish acceleration from standstill and terrible gas milage. I mean, either give me no power but great milage or bad milage but great power... but no power and poor milage is just terrible. The only thing we have not yet checked is the ECU, which controls the air/fuel mixture and timing of the engine. I can't imagine why these things would "lose" their programming or why these things would ever require any reprogramming to begin with. Any ideas anyone? Did we miss anything in our checklist? Thanks.
2007-11-20 08:31:01 · 4 answers · asked by Michael C 1 in Cars & Transportation ➔ Maintenance & Repairs
By the way, the vehicle is a 2003 Chevy Venture V6. Thanks.
2007-11-20 09:44:50 · update #1
You don't say what car this is, but Cam position sensor could be a culprit. I had this on a BMW the other day, I had disconnected the CPS to do some work, forgot to re-connect it and the car was awfull. Plugged it back in, and hey presto!
2007-11-20 08:55:11 · answer #1 · answered by Rob J 2 · 0⤊ 1⤋
its got to be something thats blocking the air from getting into the engine. i wish i could be more helpful. my father had the same problem in his truck and it was the clogged injectors, but youve cleaned them. maybe take the intake right off and see if theres something jammed in there. its worth a shot. like you say, the ecu or some sensor or something malfunctioning is most likely. i think that a damaged o2 sensor might cause the poor mileage, but ive got no idea about the power. sorry
2007-11-20 08:57:53 · answer #2 · answered by Ricardus 4 · 0⤊ 0⤋
You didn't mention if you have had the error codes read or not. It may be a problem with the ignition. The cylinder may be getting the fuel but no spark. Is the engine running smooth? You may be getting weak spark, or even a bad bunch of gasoline. Try filling the tank with a higher octane to see if that makes a difference.
good luck.
2007-11-20 08:56:44 · answer #3 · answered by Fordman 7 · 0⤊ 0⤋
take it in to the shop and let them put it on their machine to find out whats wrong with it instead of replacing parts that it doesn't need, it will be much cheaper in the long run.
2007-11-20 11:50:51 · answer #4 · answered by mister ss 7 · 0⤊ 0⤋