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2002 Ford Explorer Question: truck turns over but don't start

 

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texmexbetancourt, 4.0L V6 SOHC, Lansing, MI, January 04, 2014, 16:48
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checked inertia switch,ok checked for spark,ok checked fuel pressure,ok turns over very easy but no start. can anyody please help

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  • Answer #1

    pushrod January 04, 2014, 18:41
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     Master

    Ok, since you have confirmed good spark and fuel pressure.?. See if it will attempt to start on a little carb cleaner sprayed into intake, if so "possible" throttle position sensor stuck at wide open throttle triggering clear flood. Can unhook TPS connector and try it, or better yet the TPS signal can be checked with a DVOM or scanner. If it will not hit/fire on carb cleaner, check compression.

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    texmexbetancourt, January 08, 2014, 16:48
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    Thanks for the reply, I checked compression and its all good.Srayed the carb cleaner with the throttle wide open and it wants to fire up but only for a couple of cranks and then it just turns over. It actually starts up about an hour later. It starts on the first crank and idles for about a minute and then dies. Crank it again and idles for about 20 seconds then dies. It wont start after that for another hour or so. Also when I crank it over I'll press on gas pedal all the way down and it wants to start but it doesn't. Just recently replaced the TPS,cleaned the MAF sensor,new wires and plugs and also put new gaskets to the upper intake just in case. Checked all vacuum hoses and connections. Finally after speaking to a mechanic at my nearest FORD dealership that assured me that the fuel pump was bad, I replaced it. NO LUCK. Any ideas?

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  • Answer #2

    goodguy January 04, 2014, 21:25
     Master

    I agree with pushrod it sounds like you might have low compression if you say it is turning over easy

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