Timing set right on at 10 deg.Pings like crazy-feels underpowered...gauge not reading hot.Any ideas??

 

Take it to a shop that can test and find out what the problem is. Let it ping and you will destroy pistons.

 

Thermostat possibly

 

I know that.The truck is very rarely used,just noticed it doing this.I was wondering if anybody had a similar experience.

 

i also have a 1995 f250 with a 460. Unless i run mid to high octane gas it pings when under a load also.

 

My 1996 460 use to ping on regular with the timing set at 10 degrees. Changing the thermostat to a 180 degree had little effect.

First make sure your engine is in tune and your EGR system is working properly.

I solved my pinging problem by installing an adjustable fuel pressure regulator and gauge and set the fuel pressure to 41 psi. I can now run 12 degrees of timing with regular gas, AC on plus tow a load.

 

Guess I read into it wrong thought it was running not hot enough

 

I'll look into that.What was the fuel pressure at from the factory?Thanks.

 

Big350 - what fuel pressure regulator are you using. Thanks.

 

Thats interesting that adding an adjustable FPR solved the problem. The factory fuel pressure for '93+ was 41psi, '88-92 it was 39psi. With that being said, possibly the stock FPR had gone south and not delivering what it should, thats my only thought. On a side note, my '88 EFI 460 has pinged on 87 octane since the day it was new. I have tried several things to resolve this, but the best thing I have found so far is to run 89 octane, I forget what my timing is set at now, but I believe its around 12* and it runs like a champ.

 

I used a Kirban from a Mustang EFI. Earlier years are 3 bolt mounts. The later ones, like mine, are 2 bolt mounting.

 

You say the vehicle is hardly ever used. Gas starts to go bad after 30 days. Try runnin a fresh tank and put a can of Stable in it and keeps the gas good for a year.