Well, I did a series of tests lastnight to try to narrow down the cooling issue with my TA. I drained the radiator, and there was no sludge or anything out of the ordinary. We were able to observe the coolant flowing freely thru the radiator core, and the water pump seems strong and functional.

With the OBDII PCM that I just had programmed by Ed Wright, the car will run at 235 degrees at idle... leads me to believe that the car is running severly lean with this programming.

So I decided to pop the OBDI that I have been running for a couple years back in the car, and plug in free scan, and datmaster. The car never got above 200 degrees at the water pump, and the temp guage actually showed closer to 190.

John from Fastchip suggests that the OBDI PCM programmed by MTI has only been programmed for wide open throttle, and has little or no part throttle programming. He suggests that the richer mixture is masking my overheating problem and that the car should run at 160 or so with his PCM. He suggested that I verify my fuel pressure to be 46 PSI with the vacume hose off.


He also suggested that there is a small hose going to the bottom drivers side of the radiator that is actually a bypass of some sort. He suggested that I block this, and place the hose back over the connection. He stated that this bypass somehow bypasses half of the radiator, and that by blocking it, they have seen a 10 degree drop in temps, but 10 degrees will not resolve the issue.


John also wanted to know what the Long term Fuel trims were, but I do not have a way to monitor or capture that information for the OBDII PCM.

The only erason that I got the OBDII programmed was so that I could pas OBDII scan here in Houston, and get my sticker.. But I am a little frustrated at the moment seeing that I spent a chunk of change on a PCM that I cant really drive day to day with. I have not determined that there is an issue with the programming, but thee is certainly a difference in vehicle temps when switching the PCM's..... Seems silly to chase an overheating issue when simply putting my OBDI PCM in the car will resolve the issue.

Anybody have any informative input on this siutation?

Adam G

 

I would say you could have a problem with the Ed Wright program.
I did and messed with it for over 3 years before I got LT1 edit and did a dyno
tune. I consistently had problems with knock and running lean.

I also picked up 30rwhp from the dyno tune

 

Were you able to resolve the issue with Ed Wright and get a refund?

They have told me that I need to give them some numbers to go on, but I dont really have a way of doing that..

ADam G

 

I was never able to resolve the problem.
The reason I decided to go ahead and buy LT1 edit is because he had another guy working for him who wasn't very good to work with.
Eventhough I had had several changes made to my program over 3 years he insisted that I had never had programming done there and didn't seem to want to look up my invoices. but he also didn't seem to care about my problem either.

I know someone else who has Ed's program and after several adjustments he got it dead on.

5 years ago I took my car to AZ Speed and marine for them to take some readings but it only fixed one problem.
The numbers need to come from a dyno run with wide band o2

 

Were you by chance having the same issue that I am having with overheating? I suspect that the car is certainly running on the lean side... My OBDI PCM runs just fine, never goes above 190.

How would you suggest I get the data that they are requesting? They asked me for the Long Term Fuel Trims....

Adam G