Yes!! Your supposed to jump the TE1 and E1 terminals in the diagnostic box. It shorts ECU/sensor input/timing advance so you can set the ignition timing correctly. If you watch with your timing light, you'll see the timing retards<<so to speak<< with the jumper in and advances with the jumper out. It's supposed to, anyway. If it doesn't, something's not right.

 

Most likely, the TPS is not signalling to the ECU that the throttle is closed.
Three things have to happen for the ECU to let you set timing:
1) Engine coolant has to be at normal operating temp (means the temp sensor has to be working properly, at least at normal temp).
2) The TPS has to tell the ECU that the throttle is fully closed.
3) The jumper between the TE1 and E1 has to be inserted while the engine is running.
If #1 is true, doing #3 will cause the idle to change (usually to a lower RPM).
Then you would set timing and idle (and may have to alternately adjust both to get them both correct).

 

Abe with the details......

I wonder if goo would help in this situation? It works for windshields. And, ........well, nevermind.

What abe said.....

 

haha, alright.. so i am supposed to adjust the timing and the idle at the same time? oh geez.. i knew i shoulda read the manual. It couldnt just be another easy timing job where you give the timing light power and thats it. Im assuming i adjust the idle through the screw on the idle air control valve, right?

 

Yes.....with the large flat head. Otherwise, known as the idle bypass screw or idle speed adjusting screw . Set the timing first and then see where the idle is at. Under normal circumstances, you shouldn't have to mess much with the factory setting of the idle bypass. But, if you do, no big deal. Just don't mess with the throttle stop screw! The small one with the allan head and stop nut that the throttle lever rests on. Folks often make that mistake.

Reference.....
http://personal.utulsa.edu/~nathan-b...93throttle.pdf

 

Yesterday, i jumped the 2 terminals and redid my timing. It was not very far off at all, but i adjusted it anyway. It is now timed perfectly, but i didnt really notice any change in the way my truck drove. I filled up with gas right after i did it, so ill see if that changes any, and if it doesnt ill just start doing things like changing the fuel filter and checkin the cat and replacing my holy muffler that desperately needs attention. Thanks for the help guys, especially the quick responses around the holiday times.. I didnt really expect that

 

sometimes i have to post things twice to get it to show up here..