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mustang wont run

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Old Mar 20, 2004 | 05:52 PM
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Default mustang wont run

hey guys i have a 87 lx 5.0 its just stop runing,i was leaving my aprment on the stop signed the car started to sort of misfire then it shut off like it ran out of gas but i just filled it up too,what do ya think i can be the fuel filter cloged or the fuel pump is bad,does the fuel pump make a noice when the ignition switch is on i need some help here thanks in advance guys
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Old Mar 20, 2004 | 06:55 PM
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Well if you flip the ignition switch over you should hear your fuel pump activate in the back almost like a buzzing sound. If you don't hear that sound, well I guess that could be the culprit.
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Old Mar 20, 2004 | 09:21 PM
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fuel pump relay... its under your seat... i believe on the 86-88s
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Old Mar 21, 2004 | 04:41 AM
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well i found out the plugs dont have a spark they think is the ignition module are those eazy to change
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Old Mar 21, 2004 | 04:26 PM
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I went through this problem almost 3 years ago. All the same symptoms of a bad EEC relay.


I ended up replacing mine with a relay at Advance/Discount Auto Parts. GP Sorensen part # MR14. Should be around $12.


If this doesn't fix it the PIP as mentioned before may be a culprit. This should always be replaced at the same time as the TFI. Many owners get by with only replacing the TFI, but these two parts work in conjunction with each other. Make sure the inertia switch in the rear hatch/trunk has not been tripped. If replacing the fuel pump doesn't help the only other thing that I could think of is replacing the EEC with a new one. Checking the EEC relay is the cheapest alternative, though.
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Old Mar 21, 2004 | 06:23 PM
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I forgot to mention when I removed the old EEC power relay the was some corrosion in the connector. Buy some CRC Electrical Contact Cleaner from the parts store if you replace the relay. Scrape out the excess, if any, then spray out the connector. After it dries spray a little WD-40 in there. Wipe it out with a rag/cloth. Install the new relay.
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