LQ9 Misfire Code??

[Gordonr1973]

HI,

just going through the formal camshaft break-in and I'm getting a code on my code reader that says "cylinder 6 misfire detected".

Now, the engine sounds okay, but I haven't taken the truck in for a final PCM tune yet....

I'm wondering should I continue the break-in process and see what happens, or should I stop completely???

I have the truck booked in for the exhaust to get done tomorrow .... wondering if I would be okay to drive it there to finish that then worry about the misfire?

I'm unclear how much concern I should be paying to this code in an LS engine at this pioint before the final tune??

Thanks for your suggestions.

[Gordonr1973]

And which one is cylinder six by the way...I'm searching the net for a diagram as well

[clinebarger]

Originally Posted by Gordonr1973

HI,

just going through the formal camshaft break-in and I'm getting a code on my code reader that says "cylinder 6 misfire detected".

Now, the engine sounds okay, but I haven't taken the truck in for a final PCM tune yet....

I'm wondering should I continue the break-in process and see what happens, or should I stop completely???

I have the truck booked in for the exhaust to get done tomorrow .... wondering if I would be okay to drive it there to finish that then worry about the misfire?

I'm unclear how much concern I should be paying to this code in an LS engine at this pioint before the final tune??

Thanks for your suggestions.

Originally Posted by Gordonr1973

And which one is cylinder six by the way...I'm searching the net for a diagram as well

3rd cylinder back on the passenger side is number 6, Roller cams do not require break-in.

Check for spark & injector pulse on #6, Check for a cracked spark plug. Open headers/big cam can cause a P0300 multible misfire code. But not certain cylinder misfires unless its actually misfiring on that cylinder.

P0306 is the misfire code for cylinder #6.

[Gordonr1973]

Thanks Cline!! I will definitely keep my eye on that. Tat's a good tip on the cylinder # verses the code number, I didn't know that either!

I wasn't sure about the break-in either on the roller cam but I thought what the heck, may as well run it for a while with open headers & annoy my crazy neighbor and see if he calls by-law on me tonight. lol

I checked my plug wires and #6 was loose. Duh!! Pushed it back on and no more codes.

Someday I will learn!