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running on four cylinders

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Old 07-29-2018, 10:15 PM
  #16  
Rob Edwards
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Here's a picture of where they are, sorta- The arrow points to the plug in the bottom of the cylinder head exhaust port where the temp sensor screws on, though on this particular motor the sensor plug is in the wrong place- it's shown in cylinder 1, but on a '94 the sensors will be in the bottom of cylinders 3 and 7.

Old 07-29-2018, 10:25 PM
  #17  
Randy V
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Well hell, that doesn't look like an easy access to check and clean them!

I thought swapping the coils to troubleshoot would be a pain - that's nothing compared to this.

Thanks Speed, and Rob.
Old 07-29-2018, 10:46 PM
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Rob Edwards
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Yes, the car has to be at least on liftbars to be able to get to them, if not an outright lift.
Old 07-30-2018, 11:02 AM
  #19  
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Originally Posted by Randy V
Well hell, that doesn't look like an easy access to check and clean them!

I thought swapping the coils to troubleshoot would be a pain - that's nothing compared to this.

Thanks Speed, and Rob.
Come on Randy, you can DO IT!! Seriously, once the GTS is lifted and belly pan removed you can reach right up there unscrew the retaining nut, unplug connector, remove, clean and reinstall. It is really not a big deal.

Oh and look..we now have BACKUP(thanks Jeff and Rob)!! Woo Hooooo!!!!

Happy Monday Morning,

Dave
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Old 07-30-2018, 11:30 AM
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Randy,

Be sure and read the PDF I posted in #11, if shows locations and gives some info that might be helpful.

Here is the link again: http://jenniskens.livedsl.nl/technic...01989-1994.pdf

Dave
Old 07-30-2018, 01:36 PM
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Randy V
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First i'm going to swap the coils to see if it is bad.

Any tips or tricks on removing the passenger side coil? It is really wedged in there among the cooling hoses.
Old 07-30-2018, 02:07 PM
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SeanR
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Originally Posted by Randy V
First i'm going to swap the coils to see if it is bad.

Any tips or tricks on removing the passenger side coil? It is really wedged in there among the cooling hoses.
10mm socket on a long extension will get the lower bolt, remove it and the bracket comes off allowing you to pull the coil up enough to access the 8/10mm nuts for the coil wires.
Old 07-30-2018, 04:38 PM
  #23  
Randy V
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I might be on to something.


Old 07-30-2018, 05:20 PM
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WyattsRide
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"Houston...I mean San Diego.. we have a problem" I wonder how that popped off?
Old 07-30-2018, 05:27 PM
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Rob Edwards
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Coil fart. Switch to a gluten-free battery.
Old 07-30-2018, 05:34 PM
  #26  
Randy V
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I pulled the plug and removed the coil from the bracket to get access.

You can see the significant corrosion on one of the coil wires.

I've got it soaking in PB Blaster for awhile before I attempt to remove that wire. Hopefully it doesn't snap off, but if it does I have a new coil coming from 928 International.
Old 07-30-2018, 05:44 PM
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That huge amount of corrosion on the lower coil wire...is interesting.

Like that ONE part lived its live in a Michigan winter.
Old 07-30-2018, 05:53 PM
  #28  
Rob Edwards
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Was there a plastic cap on the top of that coil? 927 602 801 00.

Old 07-30-2018, 05:58 PM
  #29  
Randy V
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Yes, I popped it off to access the wires.

I thought it had a piece broken out, but see from your pic that notch is there for the wires to exit.
Old 07-30-2018, 06:06 PM
  #30  
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Measure the resistance of the primary and secondary windings, and report the results. Do the other side maybe too. Running the car for a while with the secondary winding open can damage the coil enough that it will never work right. The high tension circuit needs to fire into some resistance(spark plug gap), or it will overheat. My survive, or may be dead, hard to say with this coil type.


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