Bad pinging!
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Cargo Master
Joined: Nov 2003
Posts: 2,000
Likes: 39
From: North Dakota
Bad pinging!
My truck has been pinging pretty bad lately. It will run great but when I sit for ten minutes or so and begin to move again it will ping for a little bit really bad! It does not over heat when I sit there it will only get up about half way. Any ideas?
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Joined: Oct 2002
Posts: 8,547
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From: MA
Have you done anything to this truck lately? What octane are you running? Have you switched gas brands? Have you checked the timing? Have you scanned for codes? Im not sure why it would be doing this, just trying to stir up some ideas.
Rich
Rich
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Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
hook up a mechanical oil pressure gauge to see what its at when you hear this ping. give the rig a tune up , cap,rotor,plugs and wires. check timing like Wheel said. if that doesnt change much pull codes and buy some SEAFOAM from napa. great stuff and should clean things out pretty good.
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Cargo Master
Joined: Nov 2003
Posts: 2,000
Likes: 39
From: North Dakota
I run 87 octane and usaully Chevron. The timing on my truck is a mess. I don't trust it becuase when I time it to factory specs or anything close to it the engine is way too far advanced. I just time it by ear now and I like how it is but I guess it must still not be right if it is pinging like that. I went through the mc donalds drive-through and when I was sitting there the temp got to half way. It never used to never get past a quarter way up. After I got my food and proceeded to go it was pinging bad. After moving for 5 min or so the temp went back down to a quarter way and stoped. Would the heat thing happen because my timing is too far advanced? Or could it be something else? Oh yeah, when the temp goes up my truck will start too idle really rough. thanks for the help.
Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
get a timing light, take out the spout connector an set timing to 10*btdc. that is factory setting. but you must set it with the spout disconnected other wise it will not time correctly. you might replace your tstate to could be bad. go with a 195* stat.
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Joined: Jul 2002
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From: Bend,OR
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Cargo Master
Joined: Nov 2003
Posts: 2,000
Likes: 39
From: North Dakota
I already have removed the spout and set it to 10 btdc. It is not even close. Anything within 3 or 5 degrees of that is still making the engine ping. The timing light is okay because it works on other vehicles just fine. So I just try to time it by ear. Someone told me that sometimes a rubber bushing could slip on the balancer causing the timing to always read incorrect. Maybe that is what happened. I used motorcraft plugs and I don't even remeber what the wires are. I don't think any are arcing but they could, on an 88 5.0 what cylinders are 7 and 8?
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Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
well is sounds like your timing chain is slipped a tooth. how many miles on motor. get the codes read an buy yourself a haynes manual. its one of the best things to have . ive heard balancers slipping before but your motor would be off balance then and really shakin bad. also try that seafoam out works real good to clean out carbon deposits in the motor.
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Cargo Master
Joined: Nov 2003
Posts: 2,000
Likes: 39
From: North Dakota
I have 92,000 original miles. How does a timing chain slip a tooth? I have a code scanner and a manual but it shows nothing. I will try to find a Napa here and get that seafoam stuff. I am going to mess around with the timing again tonight when the temp cools down.