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Originally Posted by Nateuton
What a coincidence that you should mention the EHA. I neglected to state that when the car first started having these problems, the EHA had started to leak and I had to replace it.(new one) I forgot to mention that....
So I will go unplug the valve and see if it makes any difference. But what will I be looking for? How do I test to see if the signal is wrong or not? Does that show up as a fault code?
Thanks,
Nathan
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If not haveing the EHA connected cures the stalling problem then you can be somewhat convinced that there is a problem with the computer or one of it's input sensors (O2, coolant temp,... ) or the EHA itself. The EHA is the only mechanism by which the computer can make adjustments to the fuel mix.
If you have a volt meter you can read the duty cycle between pins 2 & 3 at the X11 diagnostic connector. This signal is representitive of the leaning or richening being made by the computer, through the EHA. This measurement is made somewhat eaiser if your multi-meter has a duty cycle function, but it can be extrapolated by measureing only volts.
But before we go down that path try disconecting the EHA to see if that affects your condition.