Date: Tue, 01 Jul 2003 21:14:35 +0300
From: Esa Tuominen <>
Subject: Re: 2500 - 3000 RPM Bucking (long)

>2500 - 3000 RPM bucking problem, at steady state throttle, on level >ground or even more when going down gentle grade. Always reproducible >when engine is hot (milder and not as reproducible when engine cold). >No noticeable flat spot when accelerating, and no bucking when gas >held steady from 3000 RPM to redline I think I had the same problem and it was the was the air mass meter. The adjusting screw didn't response to adjustment in exahust-gas test either. >- no ground at AMM #4 (should be one, per Bentley, and indicates LH >ECU is not internally grounding AMM #4: both LH ECU grounds are good, >as is continuity between AMM and LH ECU) Hmm, I was missing ground #5 in ecu (LH2.2), I added it when I found proper connector. BTW. Have you changed your fuel filter? Esa

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