92 sho problems

[92SHOcliTAURUS]

Hey guys and gals,
So ive been fighting my 92 mtx 3.2 block w/3.0 everything else. Just recently started running bad. Threw codes for irratic can and crank sensor signals. Replaced both to no avail. Ive gone as far as replacing every sensor/computer on the car. Car sputters and backfires out the intake on take off but then runs like a dream in the higher rpms. Starts right up every time but sounds like a misfire at idle. Fuel pressure is 33lbs at idle and 40lbs at wot. Cool pack is good, spark plugs are good.
Cant figure this one out. Please help

 

[zoomlater]

Did you clear all the codes and then pull them again after driving the car

 

[92SHOcliTAURUS]

Did you clear all the codes and then pull them again after driving the car

Yes, ive got no codes currently

 

[zoomlater]

oil in the plug wells? what brand of plugs and spark wires (are these new as well?) did you go with?

 

[sperold]

Make sure your plug wires look like this:

https://shoforum.com/index.php?threads/plug-wire-routing.89091/



The gap on the crank sensor is good?

 

[92SHOcliTAURUS]

Image doesnt load on link. Gap is good

 

[zoomlater]

I had a 95 MTX that had no codes but too high fuel pressure. It would have a miss from 1500 to 2500 rpm through 1st and 2nd gear. It would run fine beyond that. A new fuel pressure regulator didn't solve the miss, but a different set of spark plug wires fix it.

You can see the plug wire diagram on the link below. The second link has a bunch of SHO related data thanks to member itwonder

https://www.dropbox.com/sh/moz77s4au3hfx09/AADRW1HkbOsxdK9m7ctCkz05a?dl=0

https://shoforum.com/index.php?threads/collection-of-sho-repair-information-and-photos.136089/

 

[92SHOcliTAURUS]

So it was the plug wires. Swapped them out and car runs great

 

[sperold]

Thanks for the update.

That is a hard one to diagnose, was it the routing of the wires or wire failure?

 

[92SHOcliTAURUS]

Wire failure