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Nov 10, 2005 | 10:13 PM

pageparsley

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Joined: Sep 2003

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From: panama city

engine ping

ive got a new 5.0 crate engine with a holley 600 and aod tranny.when i get on the gas hard the engine makes knock or ping like sound. or if im in like third gear and give alot of gas the same.could it be air fuel mixture float bowl level or fuel pressure. any input is appreciated. thanks

Nov 10, 2005 | 10:41 PM

budman-mo

Tuned

Joined: Oct 2005

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Lean fuel will ping (low float or possibly low pressure) If it's instant it's probably not the pressure.

Vacuum leaks are the easiest cause (hoses or intake / carb base gaskets) Too hot of a spark plug can do it too.

Timing advanced too far.

Does it have normal or high compression ratio?

Nov 10, 2005 | 11:18 PM

pageparsley

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Joined: Sep 2003

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From: panama city

engine ping

it has normal compression. ill try out what you suggested tomorrow. thank you very much

Nov 11, 2005 | 08:19 AM

Kemicalburns

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Joined: Jul 2002

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From: Bend,OR

timing would be my first guess then carb adjustments from there.

Nov 13, 2005 | 02:44 PM

'92FlareSide

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That is what my truck is also doing, so i put in 93 octane it worked than i put in 87 and it is back and seems like it is doing it even more than before. I have a 92 f150 w/302. WHY???

Nov 14, 2005 | 05:36 AM

ken75ranger

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Joined: Jan 2004

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From: Troy,NY

I'm with Kemicalburns. Try timing, carb then an intake leak. I found a nice trick for intake leaks. Use brakecleaner to spray the bolts., If you have a leak it will make the exhaust smoke.

Nov 14, 2005 | 09:09 AM

Kemicalburns

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Joined: Jul 2002

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From: Bend,OR

92flare, check your timing. it should be set at 10*btdc with spout connector removed. it is very important to have the rig at running temp. once you have set timing and checked it. reconnect spout and start it . then turn off and unplug battery for 15mins. then reconnect and drive for 30-45mins. do some city/hwy driving at various speeds this helps the ecu relearn. also if you are due for a tune up by some seafoam and run that thru before changing your plugs out. once this has been done scan for codes

have fun