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95 Merc Grand Marquis wont stay running until warm
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bigjohn
User
Jan 10, 2012, 3:58 PM
Post #26 of 29
(1612 views)
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Re: 95 Merc Grand Marquis wont stay running until warm
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Hammer Time:
Well the Ford garage replaced the IAC and it turned out to not be the problem. They say the butterfly in the throttle body is working just fine, the fuel pressure as measured by there computer is just fine, and they want to replace the PCM to the tune of $400. and they when I asked hedged about who pays if they are wrong and the PCM doesn't fix it. What would you do? I forgot to mention the Mass Air Flow Sensor showed 20 ma low when tested by them but they say that's not the problem as it runs good when warm.
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Hammer Time
Ultimate Carjunky
/ Moderator
Jan 10, 2012, 4:02 PM
Post #27 of 29
(1611 views)
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Re: 95 Merc Grand Marquis wont stay running until warm
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I*'d tell them to stand behind their diagnosis and if it doesn't fix the problem, they can put it back on their shelf.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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bigjohn
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Jan 11, 2012, 11:36 AM
Post #28 of 29
(1592 views)
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Re: 95 Merc Grand Marquis wont stay running until warm
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I'm considering replacing the PCM/ECM myself, and I have some questions. I located the PCM Connector just below and to the right of the master cylinder, must you remove the connector and then go under the dash and remove the PCM from the inside?
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bigjohn
User
Sep 21, 2012, 2:42 PM
Post #29 of 29
(1454 views)
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Re: 95 Merc Grand Marquis wont stay running until warm
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Well I finally got sick of the stalling and restarting and got serious about replacing the ECM, as it was proven it wasn't the Mass Airflow sensor, the IAC, or the coolant temperature sensor. I just couldn't believe that I had to send in the current mileage and VIN number to get a properly programed ECM, so I call both the Cardone and Borg Warner factories and talked to tech's that both told me the ECM came factory programed to run right out of the box and no information specific to my car was needed! One of the tech's told me to call the Ford dealer with my VIN and they gave me the factory part number that is no longer serviced by Ford, and that saved me removing the ECM to take a number off it before I had the part and was ready to change it! I purchased the part for less than $100 including tax and 2nd day air shipping from one of the major discount auto parts stores, and I had the part in and the car running great in 26 min.
Big John
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