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Old 10-22-2012, 17:03   #1 (permalink)
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stalling on cold starts

i have a 02 explorer and just recently it is stalling on me when i go to start it in the morning. there is a keer sound that happens on most starts lately. i was just wondering if anyone could help me figure out what is going on. i changed the plugs and air filter. there are no codes coming up and only does the sound on the first start meaning if i start to go and get gas it makes the sound but after i get gas and start back up no sound. if that makes sence. the stall is if it sits for a period of seven or more hours. thanks for any help on the problem
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Old 10-23-2012, 04:06   #2 (permalink)
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Re: stalling on cold starts

If the noise is coming from the starter it could be dirt on the pinion shaft which is causing the pinion to stick a bit as it throws forward to engage with the flywheel prior to turning the engine . If that is the noise , removing the starter and cleaning the shaft so the pinion can slide freely should cure it . You could also check the teeth on the pinion and ring gear at same time .If not that , could be a belt slip noise .Hard to judge without hearing it .The cold stalling could be caused by the ECT ( engine coolant temp ) sensor which lets the ECU set up know how much fuel the engine needs , i.e more fuel when cold and then leans out as engine warms up .Just like the old chokes on earlier cars .
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