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K-Jet Resurrection 200 1983

posted by  someone claiming to be propav8r on  Thu Sep 25 17:20 CST 2014 [RELATED]

Hi Gents-

Doing a little more fault tracing on my warm start issue, and as I suspected, the Constant Idle Speed system is the culprit.

First off, the microswitch is bad. That doensn't affect starting though, only cruising (which explains the slight surging on acceleration and popping of the exhaust on decel)

So I was following the CIS troubleshooting procedure in the greenbook: http://www.k-jet.org/files/greenbooks/200/Section%202%20-%20Engine/TP30363-2_cis_system_repairs.pdf

Everything is good down to the point where you put jumpers across 5-1 and 4-2 to force a high idle condition. Installed the jumpers, cranked the motor, no change. I managed to get the car running, and with it running, I connected the jumpers. Boom. Instant 2,600 RPM Idle.

After I disconnect the jumpers, the idle is still high. Reconnect the CIS ECU. Idle still high.

So I took the idle air hose off the intake, and plugged both ends. Voila-car starts and idles perfectly.

So-which is faulty? The CIS ECU or the idle air motor? (I already cleaned the idle air motor). Normally, I'd replace both of them, but I'm 2 hours from a junkyard and the prices people want on Ebay for this stuff is insane.







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