My saab doesnt idle well. it races and stalls and sputters. worse when cold. my mechanic says its doesnt register on the comp. analyziser. changed sensors and checked vacuum hoses. is there a chip or something im missing? whats the best course of action? 1995 saab 900s conv.

Try some gas line anti freeze (methle hydrate) It will dissipate water which may have been at the bottom of the tank. If he put regular gas and you put super, add octane boost. and drive for half hour and it will clear.

Have the fuel pressure tested, running out of gas will destroy the fuel tank moumted fuel pump or cause it to run slow with the resulting loss of power.

the car will maintain 850/900 revs in all gears on the flat and only decelerate when the engine is reving over 1500.its called auto idling valve.....(computer controlled..)

idle control valve ,where it is and what it looks like on this vehicle i honestly havent a clue ,none of these cars here in spain

its your idle air control valve. controls emissions and controls stalling, hesitation

change the air flow meter thats your problem.Good luck

92 max
I own a 92 max 370 kms runs good but one day just cuts out while doing about 30 km, I pull over i can start it no problem but when I touch the pedal to accelerate the car stalls out.

It got worse to the point of sputtering on the highway , sometimes i could keep it alive by working the pedal but others would slow down and stall out.

I have changed the fuel filter and plugs seemed to make it a bit better but still stalling. I ran it in my driveway for 10 mins on idle then it stalls out

Is this the fuel pump??

It sounds like you may have a vacuum leak. A good way to check for a leak is to take a squirt bottle with water in it, and with the engine COLD and the engine at idle, spray some water around where the intake mainifold and the head meet. If the idle changes you found your leak, also spray any vacume hoses. Stay away from the alternater.

I had simerlar problem with opel vectra which machanic said was fuel pump so replaced it and didnt work. Any how it turned out to be water in the fuel (it doesnt need to much) so i put 2 litres of methelated spirits and running good ever since. Hope this helps.