I have seen this too...

I did not check the connection on the inside of the valve cover. That is the most suspect area to me. As soon as I get a chance I am going to pull the valve cover and check it. Truck as all the new sensors that were under recall, others I replaced recently. With the truck being a early 99, it never had the later updated shims installed on the connection under the valve cover.

I removed my valve cover and did the quarter trick, it took the rough rough idle and stall away, but I still stall and stumble and all the lights will come on and go off. Didn't have a chance to get to the shop today.

Rick

Like I said, a wire tie works perfect!! LOL lasted forever in mine!!

I've since rechecked the connection under the valve cover and is tight as can be, I'm going to try a few things mentioned on here. I am at my wits end!!!!

Rick

Before you pull anything apart did you buzz test the injectors with the scanner? it almost sounds like you may have a bad injector...buzz test the injectors..whyle your in their i would go ahead and update the valve cover gasket and harness to the newer style ones,,the connectors are much better...

Did the buzz test, all good, didn't replace gasket or the harness, truck hasn't acted up in a few days. Crazy, I know is coming!!

Rick

fixx
 

If you can keep the scanner with you,when it acts up do a cylinder ballance test and figure which cylinder it is then buzz test that injector..Have you ever did the injector orings? keep a eye on your oil level..if it goes up you have oring leakage or a bad cyliner..

FJ9 DIAGNOSTIC TROUBLE CODE (DTC) P1316 INDICATES THAT CODES ARE STORED IN THE IDM
Possible causes:
Injector(s) or circuit(s)
Open or shorted IDM enable circuit
Open/short in EF circuit
Open/short in FDCS circuit
IDM relay
IDM powering circuits
IDM
PCM
Check for other codes.
Key on, engine off.
Perform KOEO On-Demand Self Test.
Are IDM or any other codes stored?
YES,GO to the appropriate pinpoint test. NO,GO to FJ10 .

FJ10 DTC P1316 OR P1670, CHECK FOR AN INTERMITTENT OPEN CIRCUIT
Key off.
Install breakout box, leave PCM disconnected.
Disconnect IDM.
Check for intermittent open in the following circuits:
Measure resistance on (FDCS) Circuit 821 (BR/O) between IDM connector Pin 17 and PCM Test Pin 95.
Measure resistance on (EF) Circuit 818 (GY/W) between IDM connector Pin 4 and PCM Test Pin 48.
Grasp the harness close to the IDM connector. Wiggle, shake the harness while working your way back to the PCM, while looking for a spike on the DVOM.
Do all readings remain below 5 ohms throughout procedure?
YES,GO to FJ11 . NO,REPAIR open in the suspect circuit. RESTORE vehicle. CLEAR DTCs and RETEST.