Timing

[mccloskey]

I have a 99 Tahoe 4WD, 5.7. Last week I replaced the spider fuel injector with the newer MPFI design and also replaced the spark plugs, wires, distributor cap and rotor. Now it seems to have a timing problem, running rough with little power. It is throwing a P1345 code related to timing. Is setting the timing something I can do myself or should I take it to a mechanic with a scanner? Thanks!

 

[lesterl]

You will have to have a scan tool with the capability to read cam offset? Did you pull the whole intake or just the fiberglass part?

http://www.youtube.com/watch?v=4G9_aCu2Bgw

There are several shade tree ways to set the timing, when I did my LIM gaskets I just kept turning mine untill the light stayed out..... been fine since.

 

[renrut.j.k]

I also tried the adjust by turning the distributor until the light went out this was after a complete head replacement for both sides so I did have the distributor out but felt as if the timing was off still so had it hooked to a scanner (luckily my brother in law works where he could bring one home) and found my timing was still quite a bit off. Timing is supposed to set at 0 + or -2 and now mine runs much better. I can't really figured why your timing is off based on what you done unless you turned the distributor while putting on the cap somehow but then I'm no professional lol. Sorry I couldn't be more help. Good luck and hopefully you can post back and let us know what you come up with.

 

[lesterl]

Yeah, I will set mine with a scan tool or a logic probe, just not gonna do it before I replace the engine (has a large crack in block), just wanted it running.......

 

[Mayhem]

FYI.......When replacing the distributor, you think you put it back in the same spot because it drops in, it drops in 1 tooth off. Pull out distributor and rotate 1 tooth counter clock wise. I just went through this, after pulling intake off, then replace the distributor. I had pulled mine 2 times, so I went back 2 teeth and no more check engine light and purrs like a kitten now. After the second time the truck would barely start and stay running. I looked at my marks I left and sure enough it was off. Hope this helps.