Car Wars: Detonation Strikes Back

[95mustanggt]

This one is for the experienced guys out there or those who have solved detonation problems on the 94/95 GT's:

Well, I have a little bit of time so I am going to post my story and hopefully someone can give me a few ideas so I can fix the car quickly. I can't stand to lose to another dam Mazada or something else!

I have been having bad detonation since I drove down from Canada.

If the A/C is on the car detonates like no tomorrow. If you turn the A/C off after it's been on the car still detonates.

If you do not turn the A/C on or leave it off and shut the car down for awhile it runs with no detonation, for the most part.

When the car is cool it seems to run pretty good. Once the car gets a little warm it will do 1 of 2 things:

1. Run like crap with no power but no detonation (that how you lose or tie races with mazda's )

2. Runs really strong, but there is a hint of detonation between 3500-4500 RPM. (that's how you take chicks driving LT1's )

The problem is I never know how the car is going to run!

Here is what I have done to date:

I have replaced the Intake Air Temp Sensor and the TPS sensor (it was over 1.0 V). There are no KOEO codes, and the only KOER code was a 123 which was the TPS.

The Continuous memory test is giving a code however and I can't interpret it. I have said this before but It goes like this:

After 2 rounds of 111 111's it pauses 6 seconds, flash, pause 5 seconds, flash, pause 2 seconds, 1 flash, pause 2 seconds, 2 flashes, pause 2 seconds, 3 flashes.

I have not checked any more sensors, but will be working this weekend on it. I am just looking for someone to maybe give me an idea or 2 on something to try so I don't have to walk through the whole dam electrical system.

I was going to start with the EGR, then the MAF, then the Oxygen sensors, Then recheck all the vacuum lines (so far I've only half-a$$ed checked all the vacuum lines)

I've also pulled the Superchips chip.

Any Ideas???

------------------
1995 Mustang GT

[This message has been edited by 95mustanggt (edited 08-22-2001).]