question about pinging
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Freshman User
Joined: Feb 2004
Posts: 33
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question about pinging
I have a 93 ford ranger that has 280,000 miles. It runs good most of the time but when the engine temp comes up and i give it half or more throttle it begins to ping and lose power.
The only thing that i have tried so far is to use various types of engine flush and restorer.
Any ideas?
any and all help is appriciated
93 ford ranger extended cab
4.0 v6
6 inch lift
33 inch tires
The only thing that i have tried so far is to use various types of engine flush and restorer.
Any ideas?
any and all help is appriciated
93 ford ranger extended cab
4.0 v6
6 inch lift
33 inch tires
Posting Guru
Joined: May 2003
Posts: 1,211
Likes: 0
From: York, NE
It probably needs to be decarboned.
Decarbon the 4.0
Also, if you have other problems, check the sticky at the top of the Ranger Forum titled technical information. There is a lot of different threads linked in that sticky that can help out. That's where this link came from.
Decarbon the 4.0
Also, if you have other problems, check the sticky at the top of the Ranger Forum titled technical information. There is a lot of different threads linked in that sticky that can help out. That's where this link came from.
Posting Guru
Joined: Nov 2003
Posts: 1,221
Likes: 0
From: Homer, Alaska
Carbon certainly is a likely candidate, but there are several other things that come to mind. First is the timing. Usually, when an engine pings, it is because the timing is off. Carbon deposits on the piston retain heat, and will ignite the fuel before the piston reaches the optimum. It is kind of like a little glow plug. What kind of driving do you do? Home to work to store to home, or do you drive it for an hour on the freeway? Short hops will carbon up; long trips will eliminate the problem. Or it could be something as simple as a bad batch of gas. Keep us posted.
Post Fiend
Joined: Feb 2003
Posts: 6,940
Likes: 2
From: Eastern WA
The three most common reasons for ping in the 4.0L are:
1) Dirty MAF sensor
2) Loose intake bolts
3) Carbon buildup
Timing on this motor cannot be be adjusted and is managed electronically. There is a jumper which, if removed, backs the timing off by 2 degrees. Leave it alone as removing the jumper is masking the real problem and will cost you power and mileage. You will also note that the TSB for #3 advises not to use midgrade or superduper unleaded as this can aggravate the problem.
1) Dirty MAF sensor
2) Loose intake bolts
3) Carbon buildup
Timing on this motor cannot be be adjusted and is managed electronically. There is a jumper which, if removed, backs the timing off by 2 degrees. Leave it alone as removing the jumper is masking the real problem and will cost you power and mileage. You will also note that the TSB for #3 advises not to use midgrade or superduper unleaded as this can aggravate the problem.
