....it's not the usual question.I've been running 0.8-0.9 bar for the last two years with standard Intercooler.
The car has been happily running with this all this time.Recently I decided to fit the uprated Intercooler I had sat around with better fan and running the fan constant too on it.
The other Sunday I though I'd try running it at 1bar
(using the same MBC).Down the motorway it was fine and was boosting up to 1bar with a bit of a very short spike to 1.1bar at one point.
The car was fine.I then hit the dual carriageway and boosted it again and the engine lost power and engine light came on then off.
After that it wouldn't rev past 2k.I took it easy and stopped when I could and turned the boost back down to 0.8-0.9 bar and reset the ecu and everything was back ok again.
Full boosting.Now my question is, I believe the knock sensor sensed knock and went into limp mode.
I dont think I hit boost cut (it's got a fcd on it but don't know what it's set at as it was on car when I bought it 3 yrs ago) as it wasn't a sudden shutdown of power. Unfortunately I didn't have anything to read the codes with before I reset it. Also I'm sure I didn't hit full boost when the eml came on. It also went off again within a few secs.It was a warm day Sunday
, so why would my engine produce knock like that?My first opinion is the fuel pump is the original so not supplying enough fuel for the boost hence creating knock.
My temps was normal too.
What else can create knock?
Running the usual shell vpower petrol.
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