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post #1 of 6 (permalink) Old 02-22-06, 05:56 PM Thread Starter
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97 Explorer Powertrain Controll module

The diagnostic anaylzer shows codes of cylinder 4,5 & 6 miss firing. I have to assume there 's a problem with the ECM. Engine light came on first day. Second day the lifter values started to make clanging noises.

How would I find out if it's the ECM ? Ford service manager says it's rare for a module to go out. He thinks its a lifter or bad cylinder thats causing all three to go bad on one side of the engine.

Should I just replace the ECM ? Wonder if there's a aftermarket ECM for a 1997 Ford Explorer SOHC ?

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post #2 of 6 (permalink) Old 02-24-06, 06:08 AM
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Re: 97 Explorer Powertrain Controll module

Try http://www.atpelectronics.co.uk who reman ECUs including Ford ECUs (I used to work there!)

They can test the unit or you can find one of their dealers who have a test machine (called the Network 500)

Ignition coil drivers inside the ECU are a common failure.

If the ECU does not see the correct waveform for the spark then it stops firing the injectors.
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post #3 of 6 (permalink) Old 02-27-06, 05:16 PM Thread Starter
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Re: 97 Explorer Powertrain Controll module

This may not be an ECU problem. My mechanic says he checked out the compression in each cylinder and they were fine. Although there were four spark plugs that were loose. Could this have caused the miss firing in those cylinders?

He's going to go into the front end of the motor and see if the timing chain is broken or a possible tooth chip on the fly wheel which might be causing the noise. About an $800 labor job plus parts.
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post #4 of 6 (permalink) Old 04-05-06, 04:32 AM Thread Starter
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Re: 97 Explorer Powertrain Controll module Timing chain problem

Took car into Ford for a diagnostic check. Tech says there is good fuel pressure but low compression in Bank 1 of driverside. 4,5,6 cylinders are misfiring. Had the tensioner replaced on the timing camshaft. Chain must have jumped one or two teeth. Causing the engine to misfire. Ford has a special tool to time the engine. Hope this fixes it.
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post #5 of 6 (permalink) Old 04-09-06, 05:13 PM Thread Starter
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Found the problem

My Timing was definetly off. Apparently the camshaft slipped and turned by 60 degrees. Causing the cylinders to miss on the drivers side. 4,5,& 6 were misfiring and causing lean fuel to burn which ruined my catalytic converters. SOHC has three timing chains. The front chain was good, which I thought had slipped, but the one right behind it needed to be adjusted by 3 tooth sprockets. While I had the valve cover off, I noticed the camshaft was off. The bolt to it was not tighten and there was NO pin to keep it in place. Had to drill my own hole and stick a little pin in to keep in place along with welding glue. I have no idea how Ford makes this crap along with no timing marks?! The Haines Ford Rangers book will show you where the TDC mark is by going 6 marks over. Thats right, 6 sprokets over to the left and mark it so you know where top dead center is for your #1 cylinder head is on the passenger side valves. I was having low compression of under 100 on the drivers side which I believe is bank one. Passenger side was 160. Now I have equal compression of 160 on both sides. What a pain in the ass this has been ! Forget about going to the library reference section to find out about timing this engine when it slips cause there's nothing written on this kind of situation.
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post #6 of 6 (permalink) Old 04-16-06, 04:03 PM Thread Starter
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Re: 97 Explorer Powertrain Controll module

Looks like my engine is ruined. Something slipped the chain and came off it's gears. Tore up the gears and everything else inside. Something got loose ans screwed it all up. Damn!! The car was running beautifully until now. Looks like I need a used engine.
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