What might be the cause for solid Cel7 (TPS) after we have removed the failed MSP Pro Billet Dizzy and installed a stock unit.

We have checked a couple of things
-TPS is OK, was set correctly before (spare stock ITR TB with original TPS behaves the same way)
-wiring is OK, we have measured 0,45V-4,5 on ECU TPS pinout
-logged TPS value in ECU is rock solid 26%
-ECU reset done several times...

Please share info if U know any related.

Thanks!
(I hope it is not OFF topic here)

 

have you tried another ECU?
if the signal is getting to the pins of the ECU correctly yet it's not getting to the processor of the ECU, then there is either a part or a trace popped.

 

If that 26% is coming from an OBD2 scantool, then that's your problem. At idle, the TPS should be <10%, which = <.45v.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EE_Chris &raquo;</TD></TR><TR><TD CLASS="quote">If that 26% is coming from an OBD2 scantool, then that's your problem. At idle, the TPS should be &lt;10%, which = &lt;.45v.</TD></TR></TABLE>

As I said it was set properly (0.45V@0%-4.5V@100%).
The car was running fine before the distributor change and we did not touch anything else.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Relic1 &raquo;</TD></TR><TR><TD CLASS="quote">have you tried another ECU?
if the signal is getting to the pins of the ECU correctly yet it's not getting to the processor of the ECU, then there is either a part or a trace popped.</TD></TR></TABLE>

Good point. Not yet, but that is real a possibility I already considered.

There is a guy who know the trick/solution, but he does not share the info. I bet it is simple.

 

And you also said:

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by koczeka &raquo;</TD></TR><TR><TD CLASS="quote">-logged TPS value in ECU is rock solid 26%</TD></TR></TABLE>

What your meter shows and what the ECU is seeing are obviously two different things and the possible cause of your problem.

Sooo...if the ECU is reporting that the TPS is 'rock solid' at 26% despite movement of the TPS, then...there's the problem despite what your multi-meter is telling you.