Ford Mustang Repair Question
Asked on March 3, 2006
Pinging - Detonation
I have a 2000 Mustang GT with 122,000 miles. At 4,000 RPM's I am getting a bad pinging (detonation). Does not matter if I am at WOT or not. It has been doing this for some time now.
So far I have replaced the computer, fuel pump, MAF Senso, cleaned my K&N Air Intake, have ran some Injector Cleaner through it and I only run Supreme (91 here in AZ & I have tried adding Octane Boost).
Also, when the A/C is running idle sits at 750rpm's, jumps to 1,100 and settles back down to 750.
Any thoughts or reccomendations?
So far I have replaced the computer, fuel pump, MAF Senso, cleaned my K&N Air Intake, have ran some Injector Cleaner through it and I only run Supreme (91 here in AZ & I have tried adding Octane Boost).
Also, when the A/C is running idle sits at 750rpm's, jumps to 1,100 and settles back down to 750.
Any thoughts or reccomendations?
Asked by dstryker24Answer
Replied on March 4, 2006
your timing may be off. a throttle position sensor might fix the idle problem. i believe the stock timing for mustangs is 10 degrees ( i own a 92 5.0 and thats the stock timing for it)
Replied on March 14, 2006
Could be a bad knock sensor. It's supposed to retard the spark a little when it senses a knock.
The idle rpm may just rise and fall as the A/C compressor cycles.