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Discussion Starter · #1 ·
I recently purchased a 1995 9000 CSE with the 200hp 2.3 DI turbo motor. Got a few questions and concerns. I'll be updating this thread with what I find and what I do.

First question, the car overheats. I've narrowed it down to the cooling fan. Now I replaced ONE of the cooling fan relays under the hood with no avail only to find out later that there's a second relay that controls the 2-speed function and that this may be bad. I'm going to replace that soon. Otherwise, if it's the fan that's bad, do I have to replace it with a fan of the same model, or are they interchangeable? I think I may get an aftermarket fan that pulls more air and wire a toggle in the dash if not.

Second question. How do I know if the ECU has been tuned? I've read here and elsewhere that this car uses the T5 ECU, and you have to add extra pin-outs to tune. Is this correct? If so, how do I check to see if it's been done?

Third, When the car's temp level is about halfway, it boosts amazingly. The stock boost gauge nearly touches the red. Is this normal? Once the car starts to overheat a bit ( about an inch from the red) it seems to cut boost by about half, drastically decreasing engine performance. I'm assuming that this is a fail safe to prevent harm to the motor. I'm going to be hooking up an aftermarket boost gauge to see where it's at, what is stock boost level?

Fourth, my turn signals don't work. Anything specific to look for at first? I've checked the fuse in the glove box and it seemed to be fine. Is there a relay that I'm missing?

Sorry for the long post, got some questions and I'm sure I'll have more as things go along. I'll get pictures up as soon as I can.
 

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stock fan is plenty, 9ks stay really cool.... i have one if you need it i'll sell it to you for 45 plus shipping

if the car is getting really hot then you should not be beating on it anyways...
it should boost close to the red... but if its hot or its hot out it may not

the blinkers could be the turn signal stalk.. i have one of those also if you find it to be bad

pull the cover under the steering wheel off and make sure that the connections are tight in there i have seen them wiggle off... more often then not the turn stalk is bad though
 

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Discussion Starter · #3 ·
stock fan is plenty, 9ks stay really cool.... i have one if you need it i'll sell it to you for 45 plus shipping

if the car is getting really hot then you should not be beating on it anyways...
it should boost close to the red... but if its hot or its hot out it may not

the blinkers could be the turn signal stalk.. i have one of those also if you find it to be bad

pull the cover under the steering wheel off and make sure that the connections are tight in there i have seen them wiggle off... more often then not the turn stalk is bad though
Once the car starts getting hot I stay off it. I'll definitely get back to you on the fan and the stalk if those happen to be the problem. Is there still a problem with running a switch to the dash? It's pretty much going to be an override switch, I'll let the car do it's thing when I want, but on days that I really play with it or i'm stuck in traffic for long periods of time I want to be sure that I'm not overheating.
 

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no i ran a relay harness i got from napa and wired my fan up to a spare fog light switch i had kicking around
 

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Discussion Starter · #5 ·
Ok sweet. Next question, I took it out tonight to see if the boost issue is related to the overheating. And while it seemed to do really well for me when it was operating at stock temperature, once it reached a certain temperature level it seemed to start cutting boost again, so I'm going to assume that the boost being cut is related to the overheating. Has anyone else experienced this? Is there anything else that could be related to the boost?
 

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Discussion Starter · #6 ·
Ha, well i'm dumb. For some reason I've been thinking my car is a 95, and it's a 94 lol.

Did a little bit more diagnostic work, found out why my fan isn't working. Seems as though I keep burning my 30A high speed fuse under the dash. Not the relay, but the fuse. Also, my turn signals have started working intermittenly, so I'm assuming that the wires were disconnected from the stalk at some point. I went ahead and bought and aftermarket cooling fan, going to install that and hardwire it.
 
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