Quote:
Originally Posted by mysocal911
It's critical for the warm WUR control pressure be set properly for open loop, checked using the pressure gauge.
In closed-loop, the Lambda ECU should not need to vary the pressure significantly, causing surging, to achieve the optimum Lambda.
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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.
Any thoughts on the Frequency valve, Anyway it could be sticking, or failing?