If you have a voltage tester, check the tps before you replace a good part. I found a youtube video last weekend that shows you how to check it out and replace it on a 302. Mine was bad and took less then an hour to replace. Don't forget the throttle body gasket when you go to replace it!

 

I already replaced the tps and the gaskets.

 

Have you been able to locate or anyone send you a picture of the test plug wires that came apart? If not, I will try to look at mine once I get home and get back with you. I think it would be a lot easier for us to help you with a diagnosis if we knew the codes.

 

I used alldata to fix the harness the codes I'm getting are code numbers 12, 21, 41, 33, and 77. Trying to figure out what the are. I got these codes during the timing test.

 

Code 12: RPM out of spec (extended idle)
Code 21: ECT out of range
Code 41: System lean
Code 33: EVP not closing
Code 77: Goose test input missing

Your EVP sound like a good candidate to try next. This is what indicates the position of the EGR and retards the timing if there isisnt enough flow.

 

Try www.oldfuelinjection.com . My guess is a bad o2 sensor or vacuum leak. Good luck and let us know!

 

Well now I just got home and my truck stalled out and won't stay running. If you start it and give it gas it just pops and won't idle up. I know a month ago I had trouble with the distributor and I replaced it with one from a junk yard. I think it might be time to get a new one and try that. Its starting to do the dame thing it did before I replaced it.

 

Junkyard distributor? Really? 20$ Buys you a new champion one for the cap which should corect that Check again for vacume leaks.

 

Or has a new cap and rotor. I'm thinking the pip on the inside needs replaced and the module on the outside needs to be replaced. I can get the whole set up brand new for $100.