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Knock reading - Some Questions - Not the usual....

BoOsTeD_RB26

By BoOsTeD_RB26,
in Engines & Forced Induction

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BoOsTeD_RB26 Experienced

BoOsTeD_RB26

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Posted

People,

Just thought I would share this with you all as I'm trying to find out what happened to me last night whilst driving my car.

Last night I was driving home from work "enthusiastically" (not speeding of course) and heading down the freeway when I noticed my "Check Engine" light flashing, which is basically the Power FCs warning light for those of you who don't know. Basically...I think it was beginning to detonate as the knock meter registered something like 81. Not good.

In the end I had a quick look at the readouts from the FC and it basically stated that the injectors max duty cycle was only 70% and the AFMs had only reached 4.7volts. Still enough fuel, afms left.

What the hell could have caused it? The car has had a rough "clean up" tune and is running stupidly rich (10afrs) but why would it still register this knock reading? I have done everything I can to make this car as "safe" as possible but far out...

Car has never done this before? Should I be worried? Car has forged internals.

All I can think of is shithouse fuel?? I had am empty tank and just put $10 in it to get me by just before this happened, so this is the only thing I can think of, as I have heard BP Ultimate can come in very "inconsistant" batches.....

So with the following:

- 10 AFRs

- Enough injectors left

- Enough AFMs left

- and Max timing also at 35degrees, nothing crazy.

... what could it be?

Fuel pump maybe? Bad fuel?

Anyone?

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