Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Can you watch engine data with the scan tool you are using
Acording to si there is a relearn procedure needed to be done if the cmp or ckp is replaced.
Important: The Crankshaft Position (CKP) system variation learn procedure is also required when the following service procedures have been performed, regardless of whether DTC P0315 is set:
Important: The ECM monitors certain component signals to determine if all the conditions are met to continue with the CKP System Variation Learn Procedure. The scan tool only displays the condition that inhibits the procedure. The scan tool displays the signals of the following components:
Perhaps I was not clear. I have access to Alldata and Mitchell On Demand and am capable of reading the procedure myself. I am looking for someone who has actually had experience with this particular variable cam timing system and can give me a step by step outline where to find the crank relearn procedure in the Tech 2 machine. It is not listed where it normally would be or is with any other engine other than the 1 VIN code engine. I can not find a relearn procedure in my Solus or Genisys for this particlular engine and if I try to do it under another engine option it is unsuccessful. Apparently there is something unusual about the software for this engine.
I am trying to be as specific as I can get. I am an ASE Certified Master Technician with 25 years experience, also L1 Advanced Engine certified as well as certified in Florida as an Electronics Technician. I am not a parts changer. This vehicle has something very unusual going on with it, and I do not wish to be treated as an idiot who needs basic instruction. Thank you.
I got this from the GM si . I am sorry if you are offended, I did not mean to do that.I don't like to be treated that way, so I would never do that to others. If I were doing this procedure this is what I woud see. I would hook up the tech 2 and look under engine and search through the options.
OK, I am probably a little testy because I have not had something elude me like this van in a long time. Guess I need a little humble pie occasionally.
I sent it back over to the tech I know with the Tech 2. If he can't find the operation on his tool, I guess I will bite the bullet and take it to GM, although I do not have much confidence in the rip-off Chevy dealer and the Pontiac/GMC dealer is down to one driveability tech (the service manager offered me a job, in fact). Hopefully a relearn will fix my problem. I will let you know. Thanks.
The engine is not misfiring anymore, not since I replaced the CKP sensor. It only stalls now, then immediatly re-starts. I did see the TSB you spoke of earlier, and did an upper cylinder clean because I thought the valves were leaking due to carbon build up. But at that time it was misfiring intermittantly. Everything is intermittant with this thing. Anyway, good luck with your valve job. These vehicles seem to be problematic, and I will never own one. Bring back the good old Astro with the 4.3.
Mike, I honestly don't remember if I cleaned the throttle body. I did use a Snappy decarbonizer machine and cleaner, but I do not remember checking the throttle. I will look at it tomorrow, but I have never had a dirty throttle cause an engine to stall. However, I also have not had a lot of time with GM drive by wire either. What did you have to do on the trucks that did not clean up, replace the throttle body?
need help on a 1999 Chevy K3500 pickup with a 7.4 L