My tps on my dodge caravan 03' 2.4L 4 cylinder van keeps burning out and downshifts very hard on open highway. Its an intermittent shortage. I have had the pigtail to the tps connector replaced and the dealer supposedly replaced the ECM and reflashed it.
Mechanics keep burning me with charges for things unrelated. I know its either a new ECM that's required or a whole rewiring fromthe tps to the ECM. My question is where can I buy a kit to rewire the whole tps connector harness at? And any other information you can provide would be more than helpful.
p.S. I also have a 400watt power inverter directly hardwired to my vans battery, could this cause a dead short in the system and cause the ECM to misread the tps voltage? Mechanics say that's not an issue and shouldn't cause any problems, please give me some insight.
Reference voltage could be shorted to ground-see diagram below
October, 14, 2011 AT 10:03 PM
In Plain English what you're saying is the throttle position sensor wiring could be shorted? Yes I know, but where can you buy a kit to rewire the whole thing from the ECM to the tps connector end/pigtail? I don't want just the pigtail end, I want the whole thing!
October, 14, 2011 AT 10:11 PM
Dunno where you can get the kit I don't think it exist-do you have the same wiring color on the diagram?
October, 15, 2011 AT 3:30 AM
I'm a novice, so I'll have to look at it. I learn very quickly though. I was reading an article today online and I see I'll really need to use a oscilliscope to read for drop outs and spikes, and also do a wiggle test. There's just no other way. I'll try doing that on the tps wire all the way down to the ECM/PCM module. That oughtta do the trick! I hope.
That way I can find that short and/or replace the ECM/PCM. It can only be those two things right? I will have to print this diagram out of the electrical system, but I know where the wires are to the tps system and what they look like. I bumped the back of the pigtail today where the tps is while the engine was running and there was a fluctuation in idling. Then I bumped it and pressed it in and wiggled it a little bit and the van cut off. It never did that before this mechanic cut the old pigtail off and spliced on a new one, so I'm assuming there is a dead short somewhere in that wiring and also the ECM may need replacing altogether. Maybe there's a short and also the ECM is thrown off from reading so many different voltages over the times it messed up. I don't know.
I just wish I new where to get that wiring besides the dealership. Maybe I just take it all off, take pictures of it all, and go to radio shack or an electronic supply store and match the wires and rewire it myself.