Possible reasons I'm loosing spark?

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Replaced ignition module, cap & rotor, spark plugs, alternator, water temp sensor, battery, voltage regulator and car still looses spark usually after heating up. I ran the spark test light on it & thats how I found out it was loosing spark. Leaves me stranded sometimes. So far I put about 500-600$ into this. Please help....?

guitargod in Laurel MT

May 4, 2015

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RepairPal Certified shops can diagnose and repair your 1990 Mercury Sable. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

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What is your question?

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Possible reasons I'm loosing spark?

What is your question?

guitargod in Laurel MT

May 4, 2015

2 Replies

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globalhelperon May 4, 2015

poss ignition module

guitargodon May 4, 2015

Oh ok I got ya... I replaced ignition module, voltage regulator was busted and alternator was pumping 18V, fried 2 battery's, changed voltage regulator, still have the problem, runs like a champ up until car gets hot, then rpm's bounce around for a minute until it stalls. Will start right back up, run for a min & then stall again, I cleaned the wire boots to the coil but no solution yet!!!

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pushrodon May 4, 2015

Crankshaft position sensor!!!

guitargodon May 4, 2015

So far thats what I've heard from a couple other ppl. Any other possibilities?

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Popular Answer

What are the best Mercury repair shops?

RepairPal Certified shops can diagnose and repair your 1990 Mercury Sable. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.