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1990 Ford Mustang GT Question: Why will my 88- Mustang GT only run with starting fluid in the throttle body????

 

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trying to make it, Laurens, SC, September 29, 2012, 16:43
 Rookie

Car started to sputter, then finally just wouldn't run. Checked for fuel pump running it was but the pressure was only about 20psi. I replaced the fuel pump, strainer, and fuel filter. I also blew out the fuel lines and emptied the tank of old gas. I added 5gal fresh gas opened the fuel rail and ran pump until new gas came out. engine turns over with not atempt to start. Checked for Injector pulse with node light tested ok. checked for spark tested ok. If you spay starting fluid into the throttle body it starts right up and idles good until it uses the fluid then shuts off.

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  • Answer #1

    goodguy September 29, 2012, 22:58
     Master

    could be a defective fuel pump recheck your fuel pressure again

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    trying to make it, September 30, 2012, 04:48
     Rookie

    I checked, the new fuel pump is coming on, and I get 40psi with the key on. Haynes manual says fuel pressure should be 30-45 psi. I'm still focused on the fuel being the problem, because it runs good and starts so fast with the starting fluid. WHat else should I be doing???????????

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    goodguy, September 30, 2012, 19:36
     Master

    scan test for codes it could be a tps

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    pushrod, October 03, 2012, 08:01
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     Master

    MAKE SURE IT IS GETTING GOOD FRESH GAS!!! MAY BE SOME JUNK STILL THERE SOMEWHERE. GOT A RANGER IN THE SHOP NOW
    SAME DEAL CAUGHT SOME GAS IN CLEAR BOTTLE, HALF JUNK!!! LOOKED LIKE OLD MILK MIXED WITH ORANGE JUICE.
    I GOT CORRECT FUEL PSI SPARK AND PULSE RUNS ON SPRAY GOOD BUT IT AIN'T GOING TO RUN ON THIS CRAP.
    I KNOW YOU SAID FRESH GAS AND ALL BUT STILL CHECK IT AGAIN, I WASTED A LOT OF TIME ON THIS ONE!!
    CUSTOMER SAID NO WAY BUT THERE IT IS.

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  • Answer #2

    ziptie12 October 04, 2012, 07:05
     Master

    How are you spraying fluid into throttle body? through mass air flow sensor , or is MAF disconnected?

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