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Username Post: 1998 vortec 454 timing?        (Topic#261283)
Forum Newbie
Posts: 2

Reg: 04-15-11
04-15-11 05:37 PM - Post#2077241    

so my vortec's M.I.L. is on with a p1345 trouble code: cam/crank correlation my timings at 20-25* around 1200rpm sapose to be 0-2* to be inspec ive tried my disbritor a tooth over in both directons an it dosent change my cam sensor messed up? ive heard the cam sensor is what cuases the p1345 code any help or any educated guess's would be apprieciated-J

Low priced Genuine GM Auto Parts
Posts: 26153
Age: 44
Loc: Texas
Reg: 08-01-03
04-16-11 02:20 PM - Post#2077545    
    In response to 98beast

Put the timing light away; it's useless to you on a Vortec. You need a scan tool that can read the "cam retard" figure. With RPM's held at 1,000 or more, the cam retard must read within +/- 2 degrees of zero. You adjust the distributor until you get this.

If you set it this way, clear the codes, and P1345 returns then the distributor is the most likely suspect as it's probably badly worn. Before you remove it make TWO marks - distributor body position, AND rotor position - install the new distributor as close as humanly possible to those two marks, then use your scan tool to fine-tune the timing as specified.

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