I'm trying to diagnose a "hesitation" problem that my car has at all rpm levels, both on and off throttle. I've traced the first occurrence of this problem to a 2-day window that my tuner had my car at his shop. He was lowering my v-tec point with my Unichip ems. I set out tonight to undo the new v-tec wiring that my tuner installed to try and isolate the problem.

While digging around the ecu tonight, I found that the "c" plug in my ecu wasn't snapped in. It was pushed in most of the way, but definitely not "snapped" in. I snapped it in, started the car, but I'm still getting that "hesitation" problem.

Next, I look at the tps. My tps has given me trouble for 2 years. When the engine is running, if I touch any of the wires at the plug, the engine will stumble. The connection at the tps is very precarious. A few months ago, I replaced the plug. That didn't solve the bad connection problem. More recently, I replaced the tps itself. That didn't solve the bad connection problem. The engine still stumbles if I touch the plug, and I can only imagine that this poor connection has something to do with why my car is running so rough.

Am I the only one that's run into this problem (bad plug + bad tps = bad connection)? Short of soldering the wires from the plug to the tps itself, I'm running out of ideas.


Modified by Batoutahell at 12:52 AM 4/24/2003

 

You are correct. Somehow your tps is backwards. I have no idea how that could happen, but that is what it seems like to me. Very strange. I have been having a tps problem myself. My car will not run right with the correct tps voltage. I had to lower it way below spec and it will still throw cels at me. I have mine set at about .40 closed. I'm clueless. All I can tell you is the closed tps voltage spec is .45-.50 and I am pretty sure the wot is 4.5-4.8.

 

Maybe stranger is that I have yet to throw a CEL.

 

Maybe it is that fuel management system you have. Your voltage is way off though. Are you sure you were testing the right wires? I can't see how that could happen. Your voltage would be good if it was the exact opposite.

 

At first I thought maybe it's my ems, but then again, I'm not sure how it could be. I'm measuring the voltage coming off of the tps itself - it shouldn't have anything to do with the ecu or my ems.

 

ttt

 

I hope somebody has an answer to this. It would help me out too. Bump....

 

i brought my TPS from satan back to the dealership, they gave me a TPS from god

mike

 

I was just at the dealer yesterday fighting over warranty coverage for my brakes. The dealer doesn't have tps' laying around, you have to replace the whole TB. There's no way the dealer will give me a new TB under warranty, not will the jrsc and other modifications that I've made to the car.