Engine shut off at highway speed, won't fire

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jusatad

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Need help troubleshooting my 1989 SHO. It shut down while going 60 mph and would not start again. Turns over fine, won't fire. Pulled the plug wires and found plug wells so full of oil it was over the top of the plugs. Don't know if this caused the shut down or not. I've cleanup out the plug wells and replaced the ignitions system module. Still won't fire. Need more troubleshooting ideas.

Thankss in advance,
Tad
 

luigisho

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Pull computer codes. Sounds like crank sensor. Also looks like you need new valve cover seal set, plugs and wires
 

rubydist

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^^ I second all of that.
 

SHOVNST

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Exactly what I was thinking. Had the same thing happen to me.
 

rubydist

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So there are no codes present. Your system will output 2-digit codes. It does this in two sections, each repeated; the first section is current codes as the test is being conducted, the second is stored codes. So, you see 11, 11, then the 1 separator flash, then 11, 11. 11 means "system ok" (no codes).

The fact that there are no stored codes is not unusual. As we mentioned above, I would change the crank sensor and the valve cover gaskets.
 

jusatad

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The one article I found on Crank sensor replacement is missing the pictures.
Where is the crank sensor located? how long does it take to replace? Are there pictures somewhere?
This car has 187k and this is the first time I've had any major issue. Not sure I want to invest anymore time and money. Considering selling/parting out/scrapping it.
 

jusatad

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I can find the cam sensor and see a wire going down towards the crank, but I cannot see the crank sensor from above or through the passenger side wheel well. Do I need to remove the belt, idler pulley and water pump pulley to see the crank sensor?
 

jusatad

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That's awesome, thank you. I have a shop manual and finally found where it talks about the crank sensor. You provided this doc just in time. I was just trying to figure out how to get the crank pulley bolt out. If all goes well, I may be ordering a crank sensor before this day is done.
 

jusatad

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Thank you all for the help. I got the SHO running again today after replacing the crank and cam position sensors at the same time. The drop box full of documents is very helpful. I already bought a valve cover gasket set that still needs to be installed. May do some of the other 60k maintenance as well, since I don't know the maintenance history. It had 178k when I bought it and now has 190k.
 

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