2001 Mercury Marquis Engine Stalling for no Apparent Reason
I have a 2001 Merc Marquis w/ 300,000+ miles. Been great car, never a major repair.
Started to stall intermittently. Requires turning key off to get it to restart. Service guy is
telling me might be bad coils or AC compressor going bad. He wants $400 to check the
coils, more if any are bad, and $750 to replace compressor and freon. It's looking like a
$1,500 research project. Is it really $400 to check the coils? He says he has to take each
one out to test it. Any advice is welcome.
400 is too much to check coils unless you are replacing them all !! Most people guess with one or two new coils and start a system to swap them out. I would look into sensor problems before guessing ac problem. Definately get some other opinion before dropping piles of money on it, and keep us posted when you find the answer
Heck, the dealer would be cheaper than that! Go somewhere else. This guy wants you to pay for his education (he doesn't know how to fix it). Besides, testing individual coils is a waste of time. How does he explain the AC to Stalling relationship? I would more suspect a failing fuel pump but that's only a guess and I work on vehicles similar to yours every day! (Crown Victoria). 1 hour's worth of labor for diagnostics and an estimate - that's all.
Thanks for the advice; you got me thinking in the right direction. The shop is at the Dealer. Went down to listen to the AC and it seems fine. Decided to replace the coils. Went to NAPA for the parts; about $385 for 8 coils (Dealer wanted closer to $500 for coils). Gave the parts to the Dealer's service guy and asked him to do a tune up and replace the coils when they pulled and replaced the plugs. Service was $180 for the tune up, plus $100 for the original diagnostic. All in about $675. Towing was by AAA, so no additional expense on that. Car runs fine now. Car just needs to last another 18 months till the son driving it graduates. All-in-all a really good car. 300,000+ miles, and only a single major repair. Thank you Ford!
Every time I get one of our Crown Vic Patrol cars in with over 130,000 miles on it, I realize that those are a HARD 130,000. We're keeping them 'till 180,000 now. Surprisingly, in a fleet with over 800 of them, we see very few engine failures. I'm sure that your car will last just fine.
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