Quote:
Originally Posted by cheshired5
When was the fuel filter last changed?
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About 2 months ago.
Quote:
Originally Posted by cheshired5
Also, have you done the fuel correction test yet?
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No
Just grabbed another graph when all is well... same situation again, after 1 or 2 limps and resets it's then fine no matter how hard I poke it. Fuel pressure is in the same range as before when it went into limp.
This time the VNT does NOT flat-line at 95% - surely the only reason it was doing that is because it was over-boosting and the ECU is trying to reduce boost by increasing the VNT vacuum?
If it is sticking when colder, and not once HOT, the VNT control is then regulating boost as demanded and all is well.
I can't see how fuel delivery related issues etc can suddenly fix itself once HOT, but a sticking VNT could.
This engine has done 257k miles and the turbo etc has never been off.