94 5.0 pinging
Lead Driver
Joined: Aug 2006
Posts: 5,670
Likes: 13
From: Sand Lake, MI
This start after the tune up or the tune up was done in attempt correct the problem? If started after the tune up I'd take a good look at the parts that where used.
Regardless have you checked/set the base timing?
Regardless have you checked/set the base timing?
Senior User
Joined: Mar 2014
Posts: 433
Likes: 0
From: southern maryland
well i wont say you need higher octane fuel but it could help the issue until you get it resolved pinging is usually pre ignition and what about trouble codes it could be alot of thing could be your truck is running lean and getting real hot or timing and so on but i would look for codes first if you can if it were me i would want a look at the plugs but not always the case no need to start their
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Have a look at the motor in complete darkness and rev it to see if there is any arcing between plug wires or wires to block.
Pull codes and check fuel pressure.
Fix any leaks in the exhaust or air injection system upstream of the O2 sensor.
Pull codes and check fuel pressure.
Fix any leaks in the exhaust or air injection system upstream of the O2 sensor.
Laughing Gas
Joined: Dec 2007
Posts: 959
Likes: 8
From: Imperial, MO
If your truck has a MAF, it would be worthwhile to clean it, especially if you're running an oiled air filter (like a K&N). Also, verify that you don't have any vacuum leaks.
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Senior User
Joined: Mar 2014
Posts: 433
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From: southern maryland
pulling the codes not an option right now its any ones guess usually unless it was an extreme case a dirty mas air flow would not cause pre detonation unless your truck is running real lean and real hot how about idiot lights are you sure your truck is actually pinging does the pinging happen all the time
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Mountain Pass
Joined: Nov 2004
Posts: 215
Likes: 0
From: nj
the pinging is happining going up steep hills at about 3000 rpm and loses power. last night i was on the highway and had to slow down so it would stop. and the temp gauge was going up and down but never real high
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Mountain Pass
Joined: Nov 2004
Posts: 215
Likes: 0
From: nj
went to work today up a big hill and no ping and drove much better. now the brake question? when I go to stop I get a shaking of the truck like with out of round drums. but I put all new rotors and drums on it. can the abs valve on the frame cause this?