Im having some problems and I think is my TPS or my ECU.
Some times my car have problems when I step the gas, like the car is holded, the car dont have too much power then the power is back. Sometimes it turn the check light on and throw the TPS code, The TPS voltage is good. Then I reset the ecu and the code is gone. The car is fine but the problem came back after a couple of minutes driving the car but no code 7. The car have no check light on but if I jump the plug near the ecu It throw the code 7. My idle is good, my timing is good too. every thing its fine but this. This problem is driving me crazy, I dont know what to check. If u have anyidea what can be the problem please help me.

Thanks


P.S.
I have a Y7/Z6 mini-me with a p28 ecu

 

Replace your TPS.

 

check to make sure the TPS is a .5 volts at idle and 4.5 at WOT. (obviously measure this with the car not running but the ignition in run)

if it still does this, replace the TPS. it may have a bad spot in it.

**EDIT**
it may also be your ECU, but I'd try the TPS first, much cheaper.
Unless you know someone that will let you try their ECU, or have your original ECU. It will plug in and work fine, just don't drive it much.

 

I checked the volt at the tps, 0.45 at close throttle and while I open the throttle it starts to raise till 4.5 at WOT.
Should I check the ECU?

 

as long as the voltage goes up smoothly, it doesn't stutter or jump at all it should be fine.

It could be the wiring from the TPS to the ECU... try clearing the codes then wiggling the wires around and see if it sets the code.
If you hve access to another ECU I'd try that first. I've never heard of an ECU's TPS input going out but there is always a first.

 

hook up the volt meter again and very slowly open the throttle, if it has any dead spots or blips than I would change the TPS.

 

But the weird thing about it is that the problem only happend when I have my A/C on. While Im ith no AC the car feel great but if I turn the A/C on I feel a lost on power and after a couple of minutes driving the car starts to act weird. Sometimes the check light didnt light up.

Thats why I think its not a TPS problem cause if was the TPS the the problem would be always, with The AC on or off.

 

the A/C could simply be loading down the engine so this problems shows itself....

 

But thats not supose to happend.

 

things are not supposed to go bad either....

it could be the loading of the engine causing the engine to shake a little more than normal, making a bad connection worse.
Heck if the TPS arm is loose inside the case it may be causing this too.... it would test fine when everything isn't vibrating then die when things start to shake.

Check the TPS voltage while the car is running and the A/C is on. Simply tap the signal at the ECU instead of at the TPS. then rev the engine till your problem shows itself. If you see the voltage jump when it shouldn't you can start tracking down the problem from there.
If the ECU still shows the code and the voltage stays right where it should, then it's time to try a different ECU.