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95 Mustang idle issue?
1995 Mustang 5.0L car has worked fine for 2 season suddenly it started to surge only on cold start after sitting over night. it only surged a few hundred rpm for a minute or 2 ...its progressively gotten worst to the point where it will stall if i dont give it gas for a minute or 2.
once the car warms up it idles fine. any suggestions?
Car has Underdrive pullies and CAI but hasnt had issue with them before.
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Possible vacuum leak, tired Iac valve or tps.
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My car does the same 25% of the time... couple of revs and it passes.
I need to build a motor :(
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What kind of vacuum should it pull if there isn't a leak
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A small leak won't change the vacuum reading.
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-plugs / wires / cap n rotor in good shape?
-fuel filter recent / confirmed cold start fuel pressure?
-cleaned all connections at battery / starter along with body and engine grounds?
-cleaned MAF?
-confirmed TPS voltage / done idle relearn procedure?
-at least visual check of all vac hoses?
-intake hoses / pipes, all clamps tight?
-no exhaust leaks cold?
-check values of coolant temp sensor?
-clean throttle body?
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I'll add my 2 cents:
Clean out the idle air valve.
Clean the throttle body.
Already mentioned, but those are the two likely culprits I've run into with my 5.0
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Plugs, wires, cap and rotor are all under 10,000km....all vacuum lines were replaced during the build 2 season ago...MAF has been cleaned....IAC has been cleaned but didnt change anything
I did the KOER test and one code was for the ECT sensor....replaced it and it didnt fix the car..... i switched back to the original sensor....the new one was all plastic which was strange to me
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For sensor, suggest OEM Ford only, having too much trouble with aftermarket.
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Updated sensor comes with a new connector. Always suggest solder / shrink wrap vs using supplied crimp connectors.
http://www.americanmuscle.com/coolan...5-install.html