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Hot start issue 700 1990

posted by  DPNY on  Sun Aug 31 06:30 CST 2014
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last visit: Thu Sep 18 18:45 CST 2014
[RELATED]

Still going on this problem. With hot start car starts immediately but idle falls to zero in several seconds of rough running and then car stalls - if I keep the idle up it will keep running - though misses on acceleration - and then after a minute of driving all is good.

I have:

Cleaned IAC
Cleaned throttle body
Replaced RPM sensor with new
Checked cables to temperature sensors
Swapped ECU with old unit
Swapped FPR with an old unit
Checked vacuum hoses - best I could using throttler body cleaner

When I look at this:
https://www.brickboard.com/FAQ/700-900/HotStartProblemQuickReferenceGuide.htm#Overview

Regarding the FAQ - I notice that my car does not take long to start - no long cranking required - it starts right up - but idle falls to zero.

Thanks for continuing to help me with this.





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