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My fix
Posted by Tapani (more from Tapani) on Wed, 13 Mar 2002 01:18:32
In Reply to: Don't tell me this never happened to, Alain(Luxembourg), Tue, 12 Mar 2002 16:24:05
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Alain, as U know.... the final fix was the DI casette in my case. I went through almost everything else too.... BPC (was faulty, fuel cut off) then I played around alot with the BPV and was able to hide the real problem pretty well by increasing the vacuum level it opens. Finally one of the coils started to miss under heavy boost and I replaced the DI casette (170.000 km). It cured the part throttle boost fluctuation totally. I had exactly the same symptoms as you. Disconnect the battery and the problem went away untill re-adapted... then it was the same all over again. My diagnosis was that the DI detected false detonation and the boost hunted because of this.
The ECU upgrade (CC stage 1) did not change anything in this respect.
Even now the boost level might go up to yellow/red border and then settle down to mid yellow w/o shifting the throttle postition (maybe 1/3 way down), but it does NOT fluctuate back and forth.
I know U know all this already, but thought I'd just remind you how it was for me.
Best regards and happy hunting..... (no smile?)
Tapani, Finland
posted by 193.110....
Posts in this Thread:
- Don't tell me this never happened to, Alain(Luxembourg), Tue, 12 Mar 2002 16:24:05
- IMHO , chronically problem since the head was done, Pete
, Wed, 13 Mar 2002 09:13:00 - My fix, Tapani, Wed, 13 Mar 2002 01:18:32 <-- Viewing This Message
- same here, sully, Wed, 13 Mar 2002 08:56:58
- Re: My fix, Alain(Luxembourg), Wed, 13 Mar 2002 01:58:31
- 4300828, Tapani, Wed, 13 Mar 2002 02:37:30
- Re: 4300828, Alain(Luxembourg), Wed, 13 Mar 2002 03:06:05
- Re: Don't tell me this never happened to, Anders, Tue, 12 Mar 2002 16:57:18
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