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1992 Ford Explorer

Question: doesnt like to start when its cold

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singlemomma, Wisconsin Rapids, WI, November 05, 2010, 18:04
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 Rookie

i had the alternator changed cuz it died and ever since then it wont stay on. i start it and it dies rite away does this a few times and then itll stay on for a few mins. its alright after it warms up but is very slow n jus chugs along. cant get it up over like 15-20mph. no clue what it wrong wit it. tryed changing the fuel filter and that seemed to help a tiny bit but now my gas milage has gone WAY down. very confused at this. going to try and change spark plugs and wires. if anyone else has had this prob n has had figured it out plz let me know! thanks!

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  • Answer #1

    DaveJHM November 05, 2010, 22:31
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     Master

    singlemomma,

    I'm concerned that you are using so much fuel. That coupled with being bogged down driving makes me wonder if you have an injector sticking open or an oxygen sensor issue causing excessive fuel consumption. These OBDI vehicles are not very sensitive to check engine lights coming on, so you may have a problem without a code causing the light to come on. Still, you should check the truck for codes and find out if there might be a fuel trim code or something like that.

    Also check your MAF sensor for proper baro reading, as your truck could think you are at very high altitude, and adjust fuel trims accordingly.

    You will need to use (or find someone to use) a good diagnostic tester with the ability to monitor sensors.

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