Pinging after tune-up
Thread Starter
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Freshman User
Joined: Dec 2001
Posts: 29
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From: Syracuse
Pinging after tune-up
I hope someone can get back to me soon on this one. My ignition control module died and I needed to get a tow to a shop who fixed it for me for a very inflated cost (the price for needing a tow when your truck dies out of town). After the unit was replaced along with plugs, rotor, cap, etc., the truck now pings badly under light load in top gear (91 5.0 with 5 spd.). Can they adjust the timing? Is it something that is pre-set?
I am really pissed off as it has never pinged before and hate it when a mechanic can know the year and engine and not know if the timing can be adjusted (I know...the Ford 302 is SO rare!!).
Was the timing something they would have done in the course of the repair? I am not paying them another dime to finish a job I already paid for so I hope someone can tell me what I might say to get them to take care of it properly. As always, thanks so much in advance as I ALWAYS get great tips here!!
I am really pissed off as it has never pinged before and hate it when a mechanic can know the year and engine and not know if the timing can be adjusted (I know...the Ford 302 is SO rare!!).
Was the timing something they would have done in the course of the repair? I am not paying them another dime to finish a job I already paid for so I hope someone can tell me what I might say to get them to take care of it properly. As always, thanks so much in advance as I ALWAYS get great tips here!!
Lead Driver
Joined: Sep 2002
Posts: 9,182
Likes: 12
From: Gateway to the West
Pinging after tune-up
Chris,
You may also have lost the knock-sensor in which case the computer doesn't even realize that the engine is doing the pinging. Try tapping the block or intake manifold with a hammer. If the idle RPM's drop, the sensor is fine if, not, check the connector and/or replace the sensor.
You can also pull codes from the computer and it should give a code for a failed knock-sensor or at least a code that says the computer isn't getting signal from it.
The knock sensor is located at the back of the block IN the top of the block immediately in front of the bell housing for the transmission and behind the lower intake plenum. PITA to get to!
You may also have lost the knock-sensor in which case the computer doesn't even realize that the engine is doing the pinging. Try tapping the block or intake manifold with a hammer. If the idle RPM's drop, the sensor is fine if, not, check the connector and/or replace the sensor.
You can also pull codes from the computer and it should give a code for a failed knock-sensor or at least a code that says the computer isn't getting signal from it.
The knock sensor is located at the back of the block IN the top of the block immediately in front of the bell housing for the transmission and behind the lower intake plenum. PITA to get to!
Elder User
Joined: Oct 2002
Posts: 573
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From: Medina, Tn.
Pinging after tune-up
I also had a problem with slight pinging and found that plug wires # 7 and #8 were overlapping a couple of times between plug and cap. Once I corrected this, no more pinging. Ford actually has this as a bulletin.
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Freshman User
Joined: Dec 2001
Posts: 29
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From: Syracuse
Pinging after tune-up
Thanks for the info. Apparently the monkeys who "repaired" my truck didn't know about the #7 and #8 wire bulletin. Sure enough, they were side by side AND crossed!! Uncrossed them and what a huge difference. It was like that for about 10 days, should I be worried about damage to my engine? It seems okay now. I made sure to let the shop know that a big new building isn't worth a damn if their mechanics don't know their way around a 302.
New User
Joined: Sep 2003
Posts: 23
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From: Orlando Fla
Pinging after tune-up
If it was light pinging and you stayed out of it when you heard it it's highly doubtful you hurt anything in the motor.It usually takes some major pinging to do damage in my experiance.
