20 Most Recent 1991 Saturn SL - Page 5 Questions & Answers

air leak, stuck throttle body and or parts, faulty idle air control valve.

needs a tune up.

p1811 means=Replace Pressure Control Solenoid Valve Assembly. Its a common problem with saturn transmissions.

What kind of transmission ?

The first thing that comes to my mind is "45 MPH"... and let me explain why..... Your engine you said is running GREAT so a MPH is not going to effect the running of the Car but what happens @ 45 MPH you ask?Your Torque Converter goes into Lock up.... If the Torque Converter is slipping in and out of lock up, you are going to have an irregular pulsating of the engine playing catch up.you need to do this, try and drive the vehicle (you did not say what kind of vehicle it is), and drive it without the OVERDRIVE On...So drive it and see if it is RPM RELATED. If there is no CHUG and you can go all the way to 55-60 without issue, Slow down below 45 and put the OD IN and accellerate and see what happens.. Is the Problem SPEED RELATED? Is it RPM Related?If it does not happen with it OUT of OD, then what you probably have is a Torque Converter Failing... I hope this helps

IF YOU CANNOT HEAR A FAINT, MOMENTARY HUM FROM THE FUEL TANK AREA WHEN IGNITION IS TURNED ON, THEN CHECK FUEL PUMP RELAY, CIRCUIT BREAKER, AND/OR FUSE. THE FUEL PUMP IS NOT GETTING POWER

i just had almost same thing. i was getting heat then cold air. replace thermastate and bleed the air out of lline

Have you checked for voltage at the flasher unit and the switch ?

My 02 did the same thing. If I were you I'd first check for vacuum leaks and check the intake manifold gasket. They are known to go bad.Take engine cleaner, or brake cleaner and spray directly onto the intake while the engine is running. This is right under the fuel rail. Spray and listen for a change in the idle. If there is any change at all, the intake manifold is bad. Spray all vacuum hoses too. If that is not the problem you should clean the TPS throttle positioning sensor, and the AIC air idle control. Also clean the throttle body. These cars are known for this too.. First take off air cleaner hose, and disconnect the battery. On the throttle body TB you will see 2 10mm bolts. Undo them and the throttle cable. Don't lose the metal gasket. Take TB off and look at the back side of it. Is it carboned up? If so, clean with same cleaner making sure the 2 vacuum hoses are clear. Take the AIC off with a #20 torx screw driver. Dont lose the rubber O Ring. Clean it up, but dont try to move the plunger. Clean inside the TB where this plunger seats. Dirt can cause your symptoms. Clean it up good scrapping the carbon off the back of TB. The TPS is right above the AIC and can also be cleaned up a bit. put it all back together and it should run right.It's usually one or the other with these engines, please let me know what your test results come up with thanks

The cold start valve needs to be replaced. It is not letting the engine warm up properly.

best get a replacement unit and have it fitted .quickest way out

No ABS, yeh you can lock them up.