Question about 2004 Mercury Mountaineer

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2 weeks ago had tune-up done, replace the fuel filter, car still not running right, had the throtle body sensor replace on Wed. and on yesterday replace the fuel pump, truck will turn over but not start, at time seems like it want to but doesn' one time it actually started but it lasted for only bout 3 seconds...what can I do next?

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I would go down and talk to the Tuneup place. They can have it towed in or send a Mechanic over to fix it. If you live in an area where Mechanics have to be Certified, you can usually Download a Complaint form.

Give the original place the opportunity to fix it. If it was running better before they touched it, its their responsibility to make it right. Make sure the extra things you had done were done right. Check the fuel filter to see if FLOW arrow is pointing to the front of the vehicle. Listen to the fuelpump when you turn on the key.

There is a Inertia switch for the fuelpump cutoff. It will kill the juice to the pump but will not cause an intermittent problem. Check for a Fuelpump Relay in the powerbox under the hood. Bad contacts will cause an intermittent problem and eventual shutdown.

Without giving a lot of detail, ask a Dealer if the Antitheft system can cause a starting problem because you have had problems since the Battery was disconnected while work was done to the vehicle. Ask if there is a RESET sequence for it. Sometimes the Electronic key and matching memory in the antitheft lose the ability to communicate.

I hope this was helpful and would like to know the end result.

Posted on Aug 01, 2010


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