Computer swapped in, she fired up and has been driving ever since.


Thanks to everyone.

well, after spooin feeding information to my buddies shop tec, they have finally given up so I am here working on it. Impedance values for the injectors is ??? how many ohms? will continue to look around here and see If I can fnid it, but if anyone know of the top of their head yell them out loud.

I am looking for the 727 computer, 128/ 260 versions as a possible failure point, wouldnt be too suprised if the injectors were bad, dealer replaced them a year or two ago and the car ran just fine in that time until I went mach 2 on the highway that night...

Havent ruled out bad gas, but it seems to be it will run and start drive a bit then die, wont start for a few hours, start eight back up and do it all over again. Water enriched gas I would think wouldnt allow for the car to restart... I am leangin towards the drivers getting too hot in the ecu, for what ever reason. impedance out of spec on the injectors, bad ecu driver assembly.

Blah Blah Blah.... Sorry guys.

I found a computer, second day airing it here, but if the emprom is the issue, it shouldnt change. Perfect time to get a X wing top gun super street fighter chip from here...

Anyway is there anyone with a spare tgp computer with a stock tgp eprom that I could buy, try etc?

well, after spooin feeding information to my buddies shop tec, they have finally given up so I am here working on it. Impedance values for the injectors is ??? how many ohms?  will continue to look around here and see If I can fnid it, but if anyone know of the top of their head yell them out loud.

I am looking for the 727 computer, 128/ 260 versions as a possible failure point, wouldnt be too suprised if the injectors were bad, dealer replaced them a year or two ago and the car ran just fine in that time until I went mach 2 on the highway that night...

Havent ruled out bad gas, but it seems to be it will run and start drive a bit then die, wont start for a few hours, start eight back up and do it all over again. Water enriched gas I would think wouldnt allow for the car to restart... I am leangin towards the drivers getting too hot in the ecu, for what ever reason. impedance out of spec on the injectors, bad ecu driver assembly.

Blah Blah Blah.... Sorry guys.

well, all of the grounds have been checked. The shop where my car is sitting is owned by a couple of friends that I trust, though this is the first grandprix they have encountered. Be that is it may, they swapped a non turbo computer into the car and it ran breifly and now once agaon ot doesnt run.

I guess I am looking for a turbo computer, if anyone has a lead on one to borrow for a few day let me know. 309-645-5618. I wish I had the time to be more hands on with this, but right now it seems the only info I feed them is the only info they are getting.

Side note the crossover pipe came out perfect... Now if I could jsut get her to run. I am going to check the impedance on the injectors, not sure if they have done that yet. Anyway its late, Im still recovering from the stamina draining effects that Valentines day enduces on married folk.

Thanks for all the data, everyone.

Jeff: ohms might be dropping on a few which will overload the injector drivers in the ECM, causing it to shut down till it cools (meaning you can pop the hood, open the ECM cover area to allow the ECM to cool enough to get you back on your way, for a while).

Intersting. I did some checking and the dealership has put in 2 sets of injectors in the last couple of years for the same issue. (wasnt mentioned to me when I got the car, but now I am aware.

The ecu has evidently been replaced with a refurbished one...

The plot thickens, perhaps it is a blessing in disguise, the winning bidder on my auctino hasnt returne my emails. Probably a good thing seeing that it is not running right.

FPR tested good. Holds -25psi of vacume.


Bacically what is happening when lookikng at the driver lines form the ecu that activate the injectors, on the non start condiition the trouble lite illuminates very dim, (coming from the ecu). Wait a hour or two and bam it fires right up and runs right up until you press the throtte a quarter of the way. Car dies and wont start. Injectors are not oppertaing. (all off them).,

The circuit that looks at impedance in the ecu may be shot I suppose. Any thoughts? I have spark, great fuel pressues (48psi)... Is the injector driver assembly a serviceable unit?

So it is impossible to flood the car out with the stock fuel maps at wot with no boost? I will check the rest of the listed for possible failures.

Man a lot of emails and no lookers. I want 3500 out of the car, I am having the flex sectinos replaced on the cross over pipe as i write this. I can be reached at 309-645-5618 between 7pm and 9pm central standard time. I am still waiting for insite to turn on my internet at home so I can send and post better pics. Should be up and running on Saturday.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2454220131

here it is for sale again on ebay.

Thanks for all the responses, I had three rather large boost leaks at the intercooler piping, and near the intake manifold. Two clamps were loose and another was plain broke. Its always nice when its an easy fix.

Oddly enough after sitting for two days it fired back up and wreaked of fuel as if it was flooded. I am curious how the ecu regulates fuel, I know it has preset maps that follow engine load, throttle position and engine rpm. hypothetically if there was a subtantial boost leak somewhere could the car flood at wot? Saying that it is only reading the maps based off the TPS and engine RPM. One would think that it would also look at the mas air meter. Anyway I am going to look for boost leaks and such and keep an eye on it. Runs great again, fuel pressure was good. Ill keep ya all informed on what I find.

It was a brisk evening, and I needed to fill up so I did so with some good ol 93 octane. I noticed there after that the car started to lope alone abit at part throttle, surging ever so slightly. I figured it was the ecu making since of the cold air and it would work itself out... It didnt. Cruising back on the higway I was maintainign about 75-80, occasionally more than that when the road permitted doing so... I was about to take an off ramp when I noticed that the motor seemed to stall, no power, just dead. It happend after about 4 seconds of wot form 70-90 or so. I pulled of to the side of the road, the car would not start. Checked the fuses for the fuel pump, and the selinoid. Selinoid kicked on & the fuse was fine. I went through the other fuses none of which had tblown. My first thought is the fuel pump died, but I suppose it could be a crank angle sensor. Any thoughts?

Out of curiosity, what is your DSM shops name? Major failures you have seen, etc.

It sounds like you have a lot of luck racing dsm's over there in Ohio.
I have spent a little time reading through the kill stories, remenising when I had my black 90 TGP, and feeling a sense admiration that I now own a decent red one.... (with grey cloth)...

Since owning that black 90 TGP I have dove straight in to the turbo charged motor vehicle way of life, there is so much potential for cars that come factory turbocharged.

Anyway, congrats on the kills, if you ever make it to Illinois feel free to strike a race up with any DSM adorned with a DSMCENTRAL.com sticker you see. There seems to be quite a following of DSM turners here, to include myself.

I Love the refinements/ creature comforts that the TGP's have, the turbo motor once dialed in with chips and repaired x-over pipes are a great drive. Dsm's are more "go out and kick ass in a 2000 dollar beater" type car, lots of potential, but not the plushness that the TGP's offer.

My old black TGP that would get a little tirespin on the 1st to second shift change would out run the 3.8 gt grandprixs, but the supercharged ones would pull away.

My more recent red gtp with the bad x-over pipe and probable boost leaks barely kept up with a newer se model. The kid claimed that he has a nitous kit and he didnt spray on it. I didnt get to chat too much with him after pacing him from 0-90 and back. Red light wasnt long enough.


edited for correct car.

Hey Zach, do you ever make it to peoria? I see a red tgp with aftermarket wheels and a loud assed exhaust rolling around from time to time. Is that you by chance? Btw I wouldnt mind heading over to bloomington some time to hang, cruis talk cars...etc. Chances are I could find a few sotck and not so stock dsm's to come along and play with.. :twisted: