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...and even in my friend's car's case...
...the computer isn't "Dead"... it's just that the values on it are so out of whack that it isn't allowing his car to idle at all.
Like i said though, when we plugged THAT VERY SAME COMPUTER into a car of the same year, transmission type, and model, that was working perfectly fine, and that other car DID IN FACT START, AND IDLE...
...which would lead me to belive that computer is functioning properly, however it is just in absolute need of a calibration procedure.
The fact you mentioned about them inheriting the TCS error codes... that would make sense, however neither of these cars had any, so, it didn't really matter.
I guess that fact would ONLY matter to a friend of yours who is about to let you plug in their own perfectly good TCS computer, into YOUR troubled car, that does in fact have an error code...
...so i was wrong about them not having anything to risk, i guess that is their risk.... but if they are your friend, and the problem is so great, and could be fixed at the simple swap of a computer... i would hope that they would "suck it up", swap the box, run the test, inherit an error code or 2, and then make a trip later on to a saab mechanic and get the codes cleared, and why not get their own system recalibrated while they are there, for fun.
That's just a scenario i had the other day... but the car we were plugging the second box into, HAD no error codes.... so lucky us i guess.
(I can also say with great certainty, that neither car had it's throttle body "fried" by this procedure, and although i cannot gurantee it not frying yours, as David says is can, i CAN assure you that i've done it and NOT had any problems... for those of you brave enough to bear the risks in order to fix your problem) ;)
The computer in the car was literally was the ONLY problem it had... and here is why.
On the 92 9kt with the TCS brain and starting problem, the positive battery wire that comes off of the battery, and travels down to a small distribution punch down panel on the side of the battery tray, was extremely loose where it connected to the dist. block.
It was SO loose that it would lose connection completely while driving, and the car would of course lose all power, and die. This happend about 3-4 times... in random places.
My friend couldn't figure out what this was at first, but after stopping dead a few time in traffic, he figured it out. He came to my house to fix the problem...
...and i witnessed him drive up to my house, turn off the perfectly running car, we fixed the loose connection with a new ring terminal, then went to start the car...
...no start.
almost 5 days later, after switching the following things.
Battery
TCS Control Valve
TCS Saftey Valve
Main Relay
Fuel Pump Relay
LH Fuel Injection Computer
DI/APC Computer
Checking All fuses
Checking All air and vacuume lines
Checking All electrical connectors
Checking All related grounding points
...and we still had yet to get the car to start...
ANd not only that, the symptom of the car starting, and catching momentarily, then dying out immediately, hadn't been alterd ONE BIT from any of the things we replaced.
By the way, every part we had we were pulling off of a known working TCS 9kt of the same year... we were extremely lucky to have that opportunity, and of course not everyone will have that...
SO THE SECOND that we switched the TCS brain under the seat... the car started.
So David... the computers DO get whacky sometimes...
and TOM, try switching out the computer, or getting it calibrated at least.
and those of you with TCS cars?
PRAY TO WHATEVER GOD YOU BELIEVE IN FOR TCS SAFETY!
-gavin
posted by 69.168.104...
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