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Discussion Starter #1
Can any one advise me why my 1990 Carlsson intemittently displays the TCS light, followed by the engine reducing speed to idle with no throttle response. Leave the engine switched off for 10 minutes or so and all is back to normal. Possibly the only clues are an engine check light coming on at low or idle, and what appears to be a slight brake fluid leak from the bottom of the brake fluid reservoir.
I know this is not an isolated incident, but I have been unable to find a solution.

Thanks
 

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Throttle totally dead or just working at 1/2 throttle only?

My recently kept dropping into limp mode, (heavy throttle, limited revs etc) and that just turned out to be a split hose. Although I failed to find the hose myself WMSS found it for me. Check all hoses going to from the throttle housing to the valve on the bulkhead.
 

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I also have a 1990 Carlsson with the same problem. Was advised the same, replace all vacuum hoses as a poss: cheap repair. Didn't work! Mine has a stiff throttle and only boosts halfway across the gauge. It does though seem to rev ok but if revved too hard it loses throttle response completely, although completely releasing the accel pedal and reapplying seems to restore response. My TCS warning light is on all the time and the car occasionally will not start (ign: lights come on but it will not turn over. leave it 10 mins and it will start)
Could anyone tell me what the main difference is between a standard turbo engine and a Carlsson as I cannot seem to find out much. Thanks.
 

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Could anyone tell me what the main difference is between a standard turbo engine and a Carlsson as I cannot seem to find out much. Thanks.[/b]
The Carlsson's engine is mechanically identical to other 1990-1992 2.3T's, it just has a different APC unit (electronic boost controller). AFAIK all 1990-1992 2.3 Carlsson's had TCS as well, but not all standard 2.3T's had it. I have a regular 2.3T but I have TCS ... sadly.

Regarding your problems, you could try checking the ETS fuse, it may have blown. If that doesn't fix it you'll probably need to take it to a garage that has Tech 2 so they can run some diagnostics on the ETS/TCS systems.
 

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HAD EXACT SAME PROBLEM WITH MY 92 CARLSSON IT WAS THE NON RETURN VALVE HAD COME APART.
mIGHT ALSO BE FAULTY WHEEL SENSOR OR ECU
 

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Hey, Mark

Might want to check if the steel cable running to the throttle body is loose enough. I had the same problem with the TCS jumping on. I couldn't find it myself. All the hoses were connected correctly and in fine condition. The mechanic did the same search as me and the last thing he checked was this cable. No TCS-problems after that.

Good luck,

Steve
 

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Discussion Starter #8
Many thanks for all the advise. Had to take car to Saab specialist (not dealer). The problems originated from the TCS safety valves. (one located on bulkhead O/S the other N/S inner wing)The garage replaced these with good s/h units. Car now goes like a train.However I will be replacing all of the vacuum hoses.
For those who want to get rid of TCS altogether, Two Stroke to Turbo in Hatfield, Herts, can do the job for a fee.(This may be a long term plan for my car.)
 
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