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87-740 . The engine idles good. Above idle, not so good. Help!

posted by  mapleleafer on  Sun May 21 11:27 CST 2006
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last visit: Wed Oct 9 00:36 CST 2013
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You dont say if it is a turbo engine or not. They have richness problems that do not affect non-turbo engines. Idle switch is used to kill any timing advance and cause ECU to maintain idle speed with IAC. Mixture is still trimmed by O2 sensor voltage and not related to speed. <50 ohms is ok.

For ha-ha sake, pull the vacuum hose from the fuel pressure regulator and check for liquid. If it is dry like it should be, then suspect the AMM. Plenty are available on ebay - last 3 digits of part number must match.






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New 87-740 . The engine idles good. Above idle, not so good. Help!
posted by  someone claiming to be Lawrence  on Sun May 21 11:17 CST 2006 >


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