Quote:
Originally Posted by massmike
About two months ago I had sent the WUR to Tony (on here) to have him go through it and make sure it was up to spec. The only issue he noted was the speed from cold control pressure to warm was quite fast so he made some adjustments to that. I also found a failing fuel accumulator was causing a hard start issue, this was replaced.
I can go back and verify control pressures again to make sure nothing has changed.
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Yes, check the warm control pressure to spec.
Quote:
Originally Posted by massmike
Any thoughts on the Frequency valve, Anyway it could be sticking, or failing?
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Just monitor the control pressure while hot & running. The pressure per a gauge should not vary.
Check it with the O2 connected & not connected, i.e. basically no pressure difference.
If still no improvements, one can always attenuate the O2 signal, e.g. reduce by 50% - a simple two resistor voltage divider in the Lambda ECU.