1990 Buick Reatta - Answered Questions & Fixed issues

It may be a bad pressure switch or refrigerant temp sensor.

Make sure your battery cables are clean and tight. I had a tow in one day because I could not boost it. After the tow in they replaced my two battery cables and bingo no trouble after that.

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Don't understand ......the fuel metering is done by the ECM. You must drop the gas tank to get to the fuel pump.

The unit in the dash with the buttons gets dirty. You can remove it from the dash, take it apart and clean the pads under the buttons and I have had 100% success fixing the problem

You could have a bad relay in the start circuit. The relay is there because of the security system. If someone tries to jump the car to steal it, the alarm will disconnect the relay and the car will not start. I believe it is in the relay box in front of the air cleaner

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Probally just a bad connector somewhere leading from the ecm

If you're certain it IS NOT running hot, then it is the gauge itself. I am assuming the water pump is pumping, etc...There may be a sensor plugged into the radiator or the resevoir you can disconnect.

bolt is striped out remove j b weld replace

Does the AC have a charge in it, that would be the common reason for no AC in this year. Temperature control module?? no such part.

You read too many web site blogsPeople make up stuff about fuses,relays,resettingthingsHave the A/C System diagnosed & the problem resolved

I would try replaceing the master clylender and rebleed the brakes start at the right rear have some one help you press the brake paddle down and hold it open bleeder its where the brake line connects to the brakes looks like a greese fitting open the bleeder then close it let brake paddle back up repeat until you have fluid comeing out of bleeder go to the left rear do the same then right front to left front

in 1990 cars took r12, if your car has not been retrofitted to 134 the valving will be wrong, and you will not be able to add freon. you will have to at least get someone to look at it and tell you if it has been retrofitted or not

I doubt it,, but I'll do some checking for you,, most master cylinders and boosters are on the firewall on the drivers side, under the hood,,

code 022 TPS ( throttle position sensor ) signal high


code 041 camshaft sensor signal

Crank sensor.

Check & inspect bulbs and sockets on the right side front and rear. Also check the bulb and socket you just replaced.

well it sounds like you have a major problems here . If your coolant level is dropping and the oil level is high it sounds like you have a head gasket leaking coolant into your oil system . Is the oil a milky color . if so i would look at a head gasket problem . Also if the oil does look milky it may have gumed up the oil level sensor so it is not working right

Drain the oil and check for coolant, if there is coolant present, you have a head-gasket problem. You may also notice sweet smelling exhaust because of the coolant leaking into the cylinders.