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Old October 16th, 2007, 03:38 PM   #1
Symmes
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Default 02 Explore problems

My girlfriend has a 02 explorer. It wouldnt start for her yesterday. The only way that it would start is with ur foot on the gas, then it will die if u take your foot of the gas. She has a bad habit of running it down so the tank is almost completely empty. So im thinking that the fuel filter is full of dirt? Anyone heard of any problems like this or something else it could be. I live in pennsylvania and havent had a chance to look at till this weekend so anyideas would be great.
thanks
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Old October 16th, 2007, 03:44 PM   #2
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check voltage across the throttle pos sensor... should be 5V in, gnd, and about ,75-.85V at closed throttle

then check fuel pressure on the fuel rail
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Old October 16th, 2007, 03:48 PM   #3
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Alright thanks ill check into that.
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Old October 16th, 2007, 07:04 PM   #4
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Quote:
Originally Posted by Symmes View Post
My girlfriend has a 02 explorer. It wouldnt start for her yesterday. The only way that it would start is with ur foot on the gas, then it will die if u take your foot of the gas. She has a bad habit of running it down so the tank is almost completely empty. So im thinking that the fuel filter is full of dirt? Anyone heard of any problems like this or something else it could be. I live in pennsylvania and havent had a chance to look at till this weekend so anyideas would be great.
thanks
jake
To me, "holding your foot on the gas to start it" is called "clear flooding it" on a FI motor.....meaning when you crank it without touching the gas the injectors are putting way way too much fuel into the motor - when you hold the gas pedal the PCM recognizes that the TPS voltage is max, and cuts injector pulse for a few revs of the motor

If it were me, I'd "attempt" to start it without holding the gas, and then I'd pull a plug (the easiest).....if the plug is black or wet, the PCM is injecting too much fuel and you've gotta find out why.....and to be honest, if that's the case a look at data stream with a scan tool would probably yield something obvious

I agree with bones though, without a scan tool, I'd also check TPS voltage and fuel pressure.
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Old October 23rd, 2007, 06:05 PM   #5
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If she dosent have to hold it all the way down to start it could be a bad vacum line or a dirty throttle body. Both will cause problems with cold start and idle.
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Old October 23rd, 2007, 09:54 PM   #6
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Most likley a stuck idle air valve, have her start it with her foot slightly on the gas, once it is running tap on the idle air valve a couple of times and then see if it will idle.
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Old October 27th, 2007, 06:27 PM   #7
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i agree with frd boy. check out the IAC they are know to be pieces of crap.
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