Ignition Timing

[LumbChuck]

I can't turn my timing down past 15 advance . I have checked to see if I was one tooth out, but was not . This is a new cam sensor I'm dealing with . Has anyone had this problem and how did you fix it ?

 

[MDCmotorsports]

Check and verify that the check engine light comes on.

If it doesn't, check to make sure your diagnostic wire is inserted correclty.

If the CEL light comes on, and you still can't get her below 15....

Your CPS is ONE TOOTH OUT. Take the cam cover off, verify what tooth / teeth are lining up.

Mark those teeth (cps / cam).

Then move either one tooth left, or one tooth right.

Try again.

 

[Frank Rizzo]

Also, make sure engine is at operating temp before you use the diag port.

I think he skipped over the diag port part.

 

[jetjock]

^ That would be bad. Also, as MDC pointed out, always check for a normal MIL code whenever the diag block is jumped before doing anything else because if the IDL contact is open timing can't be set.

 

[Boostedstr8six]

Does the engine really have to be at op temp?

Also, I've never thought of checking the MIL to ensure proper 'jumpering'. Thanks Please hold any RTFM comments...lol

 

[Frank Rizzo]

Checking the MIL and disabling the electronic advance use the same terminals at the DIAG port.

Read the TSRM, it tells all.

 

[MDCmotorsports]

^ Correct. But - some people just put the jumper wire in "thinking" they are good to go. YOU MUST check that the CEL comes on first before adjusting timing.

 

[MRSUPRA]

I had that problem with my BC264 cams. Every time that I went to push in the CPS it would jump a tooth. I couldn't figure it out until I pulled the CPS cover off to see what was going on. I really had to come in at an "off position" to get it to stop jumping off.

 

[jdub]

It should look like this installed w/ the crank pointing at zero and BOTH cam gears pointing at the index marks on the back plate: