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#1
05-18-2014, 11:51 AM
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Misfire issue
I have a 2002 Ford Windstar with 125k miles. I have experienced issues with CEL going on and TRAC / ABS / BRAKE lights on and off for a long time. I developed an issue with the engine misfiring and engine running terrible - no power, hesitation - LONG time to increase speed and engine misfiring - acting like it is running on only a few cylinders. I have added fuel system cleaner, replaced the spark plugs and spark plug wires. No imporvement. I had the engine checked and was told cylinders #3 and #4 are not firing (not getting spark). They suspect a bad PCM, since they could not get electrical signal to the coil pack. Is it more commmon for the coil pack to go bad - over the PCM? Should I replace the coil pack? I read I can check the wire (#1) from the PCM (which sends signal to coil pack for #3 and #4) to see if there is any signal - should I do this before replacing the coil pack? I find it hard to believe the PCM would go bad. I do not see any water damage on the wires at the PCM and dont see and damaged or disconnected wires. By the way, I tried to get TWO automotive supply businesses to try to find a CODE but they were unable to get ANY code from the plug in control input, located underneath the steering wheel.
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#2
05-18-2014, 01:51 PM
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Re: Misfire issue
I would first pull the intake plenum and clean the EGR ports. Also remove coil pack and look for tiny hairline cracks on the bottom. It's a common failure item so you could always try another to see if that fixes the problem.
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#4
05-19-2014, 07:40 PM
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Re: Misfire issue
I pulled the coil pack and replaced it. It SOLVED the issue! the coil pack DID have small craks on the base of the unit.
I would first pull the intake plenum and clean the EGR ports. Also remove coil pack and look for tiny hairline cracks on the bottom. It's a common failure item so you could always try another to see if that fixes the problem.[/quote]
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#5
05-19-2014, 07:44 PM
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Re: Misfire issue
That may be accurate........since the coil pack was the issue in my case. I also found it hard to believe the PCM was the culprite. It was not.
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#6
05-20-2014, 10:42 AM
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Re: Misfire issue
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#7
05-20-2014, 02:09 PM
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Re: Misfire issue
Actually I am on my original one...! But theres a story behind it. When I was looking for the engine vibration that turned out to be the harmonic balancer I did replaced the Spark Plug Wires & Ignition Coil Replacement on 02/19/08 @ 51819 miles trying o fix the problem.
I kept the original since the Coil wasn't the problem after all, and then I had the original Ignition Coil put back on 08/20/11 @ 84590 miles, when the cheap replacement actually developed a crack on the casing. The van is at 108K now, so it's been about 75K on my original Coil now
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---------------------------------------------- Current Rides: 2018 Honda Pilot EX-L - 3.5L V6 -{|}- 2004 Toyota Matrix XR 4WD 1.8 I4 ________________________________________ Past Rides: 2000 Ford Windstar LX - 3.8L V6 SFI - {|} - 2003 Ford Expedition XLT - 4.6L V8 SFI 2005 Chevrolet Malibu LS - 3.5L V6 SFI - {|} - 1991 Chevrolet Corsica LT - 3.1L V6 MFI 1995 Dodge Grand Caravan SE - 3.3L V6 MFI - {|} - 1980 Ford Mustang - 3.3L L6 1BBL ----------------------------------------------
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