Coil problem
Dec 9, 2012 | 10:16 AM
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From: south jersey
Coil problem
My wifes 3V mountaineer has had a bad miss for a long time now. It seems fine until around 40-60 mph where it bucks and misses bad. I replaced all the plugs and it went away for a while but its back again. So far Ive replaced 3 of the coils with the accel coils but its just a shot in the dark really. Can you guys tell me an easy way to check the coils or cylinder to see which one is truly the culprit?
Dec 9, 2012 | 03:10 PM
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From: BC Canada
If it bucks and misses enough times it will set a MIL... or you could connect an OBDII scanner and check for PENDIN codes.... Philip
Dec 9, 2012 | 03:12 PM
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From: south jersey
It bucks all th etime between 40-60 but no cel.
Dec 9, 2012 | 03:16 PM
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From: BC Canada
I doubt you have a coil issue, does the CEL illuminate when you first turn ignition on (no start)....... Philip
Dec 9, 2012 | 03:20 PM
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From: south jersey
I believe it comes on then goes off like its supposed to.
Dec 10, 2012 | 08:43 AM
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Bucking under load is more often an issue with a sensor such as the MAF. Clean it with MAF sensor cleaner and see if it doesn't improve. Do yourself a favor and replace the POS Accel coils with Motorcraft.
Dec 10, 2012 | 01:39 PM
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From: south jersey
Really? The accel coils are junk? That sucks. Spent like $120 on 3 of them so far.
Dec 10, 2012 | 02:21 PM
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From: BC Canada
Quote:
Originally Posted by
panteramatt
Really? The accel coils are junk? That sucks. Spent like $120 on 3 of them so far.
That is why it is best to fulfill the basic diagnostics first.. Philip
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Dec 10, 2012 | 03:00 PM
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From: south jersey
Sorry but what do you mean by that? I dont have a cel so Im not sure on the problem.
Dec 10, 2012 | 05:16 PM
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From: BC Canada
Miss-fire/bogging under load can manifest under many circumstances...
I suggest connecting a LIVE DATA SCANNER.
Check for pending codes,
then record the values for MAF, O2, LTFT, ECT.
Verify correct fuel pressure,
...Philip
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