LQ4 Pinging

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Oct 14, 2013 | 06:34 PM

69importkilla

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LQ4 Pinging

So I'm getting what I think is pinging in 5th and 6th gear. I've tried running 93 octane with no success. I'm using the MSD 6010 controller and pill #1.

Doesnt make any sense. The car is over half the weight of the truck the engine was pulled out of. Maybe a different heat range plug? Any suggestions would be helpful!!

Oct 15, 2013 | 06:26 AM

Old Geezer

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Try the tune/diagnostic forum??

Oct 15, 2013 | 06:54 AM

69importkilla

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I posted in here because I figured this is were the most experience would be found with conversions.

The tune/diagnostic forum says PCM on it, so I figured my carbureted application didn't apply there.

I did put a copy in the carbureted LSX forum, maybe someone can help.

Oct 15, 2013 | 08:32 AM

oange ss

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what carb/jetting ?

Oct 15, 2013 | 08:35 AM

69importkilla

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Staging Lane

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Holley 650 DP out of the box. Not sure what the jetting is but I can find out...

Oct 15, 2013 | 08:42 AM

oange ss

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have you adjusted the secondaries ?

Oct 15, 2013 | 11:27 AM

69importkilla

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No just dropped the carb on right out of the box.

How would the secondaries cause this issue? Not trying to be a wise guy, just learning..

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Oct 15, 2013 | 12:27 PM

69importkilla

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Staging Lane

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Still curious if anyone has any knowledge how the secondary's can effect this?

Back to orange ss, thanks! I'll look into it tonight.

Last edited by 69importkilla; Oct 15, 2013 at 12:41 PM. Reason: modified comment's

Oct 15, 2013 | 04:19 PM

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oange ss

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secondaries aren't the root cause, carb needs tuned or reduce timing

Oct 16, 2013 | 12:49 PM

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Renegade6

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This may or may not be related but, I had a pinging problem on my Silverado that drove me nuts. Ended up being the bendix hitting against the flywheel. Only heard it at freeway speeds under a load.