Question about Ford Aerostar

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Took it in and had it put on diagnostics, it acts like it needs a tune up however we have already had that done. So diagnostics said it needs a new ignition coil pack.. we put that on... and still it misses.. even back fired once and it loses power .. it runs rough then for no reason runs fine .. I am at a loss PLEASE HELP?

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  • dave274 Jul 31, 2008

    1994 aerostar 4 liter all wheel drive. hesitated for some time when cold, now stalls when cold when you accelerate from a stop. 2 years ago i replaced the fuel pressure regulator as the diaphragm in it failed. this led to fuel filling the intake manifolf via the vacuum line from pressure regulator. I have scanned the computer, no codes set in koeo test. generates 2 codes during koer test. one engine coolant temperature sensor out of range, second for cylinder balance test failure-throttle movement. I suspect the there might be air leakage into the throttle body from around the snorkle and wonder if it is so; could this unmetered air give enough of a false reading from maf sensor to cause stalling cold? the engine runs fine warm. Also, sometimes, it is misfiring on start up, running very rough.

  • Pam4CM Aug 11, 2008

    My 2001 Ford Escape has 150000 miles. Started having a problem staying running when idling. Fuel filter was cleaned and ran fine for a couple weeks. Then started having problem with hesitating and "chugging" when driving at city or hwy speeds. This problem is intermittent. Completed recommended tune up. Ran fine for a couple weeks then same problem. Replaced two ignition coils. Ran fine for a couple weeks then same problem. It is in the shop now! Any ideas?

  • Anonymous Aug 11, 2008

    Could you have gotten a bad batch of fuel [water in it]? Try a couple cans of HEET. Tishappened to me and I replace fuell pump [diapram] before finding ou it was water in the fuel. Good Luck.

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Check for vacum leek when tuned up did you replace fuel filter

Posted on Jul 27, 2008

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