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Re: Loss of power/hesitation when hot (archive)

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Posted by ///M325 on May 15, 2001 at 10:57:52:

In Reply to: Re: Loss of power/hesitation when hot posted by TechnoViolent on May 15, 2001 at 10:39:24:

I will put the stock chip back in, but don't think it will fix the problem. This problem is quite old and actually predates the J.C. chip. began at about 80K mi. Only shows up on very hot humid days. I think it is a sensor problem but not bad enough to get the ECU to show an error code. It will bog during take off to the point that clutch is engaged, foot partial on gas, but car doesn't move. No hic'up, no backfire, no stutter. Then just as it should stall, it slowly begins to move. RPM's rising slowly to about 3K then it kicks-in with full power.

My old '93 325i w/ 135k miles, JC chip and SSprint exhaust, started doing the very same thing, very intermittently, at about the 130k mile mark. I also started getting some knocking/pinging/detonation. I experimented with octane booster and it helped considerably. You may want to try going with the stock chip and/or an octane booster.

My car has continued to suffer lack of torque/hesitation when the ambient temp. is above 90 degrees. This has been a problem for several years now. Once the rpm's rise above 3k it goes like hell/normal. It can bog severely in city traffic. A/C has no real effect on the problem. The car is a '92 325i 135K mi. with M3 exhaust, J.C. chip, and debaffled but othwise stock airbox. My mechanic realigned the cams and improved the problem temporarily, but did not last very long. Can the timing chain stretch that badly? Has anyone else had trouble with cam timing changing?

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