Why does my idle fluctuate with a new chip?

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02-13-2008, 06:56 PM

Azxster

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Why does my idle fluctuate with a new chip?

My P28 died so I bought a new (used) P28 with a new chip from a tuner.

Before, I had a GSR chip for my B16A2, the idle (when cold) would fluctuate softly. I went to a tuner and requested a B16A chip which fixed my cold idling issue. The ECU fried after a month so I bought the new used P28 from a different tuner/shop. The rpm softly fluctuates and the tuner said to adjust the idle screw until it settles.

Car: 1996 Civic EX w/ 2000 B16A2

Does anyone have an input?

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02-13-2008, 07:04 PM

95sloweg

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Re: Why does my idle fluctuate with a new chip? (Azxster)

have you tried to mess with the idle screw?

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02-13-2008, 07:10 PM

Boostedb20EH2

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Re: Why does my idle fluctuate with a new chip? (95sloweg)

Fluctuates from where to where and how fast. Could also be your IACV or FITV

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02-14-2008, 10:07 AM

Azxster

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Re: Why does my idle fluctuate with a new chip? (Boostedb20EH2)

Fluctuates from 1000-2000 very softly.

Like sometimes when I tap on the gas to inch up, it would stay at 2K then drop to 1.5K. Then climbs up slowly to 2K and drops down.

This happened with a GSR chip, did not happened with a B16A chip, but my ECU fried so I bought a new P28 with a B16 chip.

How do I adjust the idle screw? Do I adjust when its warm? It doesn't really happen when car is operating temp.

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