Knock/Ping in 2000 GT

[Go Heels]

I have a 2000 GT, in the morning and especially when it's cold my car pings a little under light accleration. The Ford dealer told me to stop using 93 octane gas and that helped, however if I use 87 like all the manuals do it spark knocks under full throttle very badly. I have found a happy medium in 89 octane which has stopped the knocking at full throttle but it still pings when the engine is cold or when it below say 45 degrees. This car is stock except for a K & N filter. Has anyone had this problem or have any idea what causes this. I am the second owner and the other owner was an older couple that never drove it. It's a manual and it only has 27000 miles on it.

 

[okc2KGT]

how does going to a lower octane gas help stop pinging?

 

[Go Heels]

Don't know, but damn if it didn't work..

 

[Go Heels]

I took the car in a to the FORD dealership and the "head mechanic" rode with me and listened to what the car was doing and said the car will do "all sorts" of weird stuff if a don't use 87 octane. I explained to him that if I use 87 octane my car will spark knock under full throttle badly. He had no answer for me except that he could de-tune my car..I said no thanks. So now the only propblem is a ping/knock sound under light acceleration only when it cold outside.

 

[wms004]

I have a 2000 GT, in the morning and especially when it's cold my car pings a little under light accleration. The Ford dealer told me to stop using 93 octane gas and that helped, however if I use 87 like all the manuals do it spark knocks under full throttle very badly. I have found a happy medium in 89 octane which has stopped the knocking at full throttle but it still pings when the engine is cold or when it below say 45 degrees. This car is stock except for a K & N filter. Has anyone had this problem or have any idea what causes this. I am the second owner and the other owner was an older couple that never drove it. It's a manual and it only has 27000 miles on it.

I have a 2001 and mine was ping/detonating bad. I took it to my local mustang performance shop (www.apexmotorsports.com) and they told me to run 91 octane and it still was detonationg. So, i let them dyno tune it, add and retard timing in all areas along with adjusting the air fuel ratio and the car has run smooth ever since. Its expensive to get a tune, but highly worth it to save the life of your motor.

-wade

 

[Go Heels]

You've got Flowmaster Deltas, mine go on next week

What did your tune cost? If you don't mind me asking.

 

[wms004]

You've got Flowmaster Deltas, mine go on next week

What did your tune cost? If you don't mind me asking.

You will like the 2 chamber deltas. I HIGHLY HIGHLY recommend matching them with a magnaflow catted X pipe. Sounds really smooth and gets a little more volume to the flows.

My Autologic chip was 300 and the tune was about 130. Thats a pretty average price.. I trust the autologic software since i've had it and had no problems, but i've heard good things from superchip tunes as well.

-wade