need second opinion car trouble 91 chevy corsica 3.1?

Question

this car has been overheating intermitently, usually at an idle, when It gets moving goes back to normal op temp. See no visible leaks loss of fluid, oil or exhaust shows no sign of coolant, no much if any coolant prob one.

prob two- car died loss of power, lights everything fine, restarted car, ran 10 miles, died again, keep foot on gas peddle would stay running, got home checked fuel pressure 40 psi, had spark at all cylinders, would start with starting fluid. next day check codes none, started, died at first when put foot on gas peddle happened several times, finally after let it build up ran fine, and could rev up fine did this turning off and on about 5 times. any ideas this is my dads car and he doesn't have the money to throw parts at it. I appreciate any and all help. I have more defined definition but this only lets me say 1000 words. thanks ahead of time

Answer 1

prob one is probably the radiator is plugged. not all the way just enough so when your not going down the road the system can't keep up. does the radiator look green or discolored. try flushing it out if that doesn't work maby needs replacing. prob 2 could be caused by the erratic temperatures. but that should show up as a code. i had a ford once that would just not run once in a while turned out to be the wire to the fuel pump was rotted and not sending voltage all the time. good luck

Answer 2

Problem #1, electric fan not turning on.

Could be several causes.
1) Bad thermal switch.
2) Blown fuse.
3) Bad relay.
4) Bad fan.
5) Unplugged?
Buy a $6.00 12 volt test light and find where the voltage stops.


Problem #2 Vacuum leak. Small hose came off the intake?
Look around for a hose (small) that is just dangling not hooked up to anything. Also, with the engine idling, listen for a high pitched sucking noise where something isn't hooked up. Somewhere on the intake manifold.

Answer 3

first off. The cooling problem, check and make sure your cooling fans are coming on when it gets hot. if they are then it could possibly be a bad thermostat. If the fans arent coming then possibly your coolant temperature switch. There are usually 2 of them, 1 of them controls the gauge in the car and the other turns the fans on when it starts getting hot. I had a problem similar to one you describe with a chevy blazer it would start sometimes then sometimes it wouldnt i had to use starting fluid to get it started a lot of times. it turned out to be the computer had a short and wasnt turning the injector on all the time.hope that helps.

Answer 4

2 problems, i believe.
prob 1- either bad thermostat. boil to check it. should open right before water boils-195 degrees. or sediments in cooling system. radiator flush. (free with garden hose.)

prob2- maybe pressure regulator-easy to test.

follow the fuel lines from the injectors backwards. they will lead to this little mushroom looking thing that also has a vacuum line on it. first, pull the vacuum line and see if there is liquid fuel in it. should be none. also a 3rd line returns excess fuel to the tank. pinch it off with a pair of vise grips and see if the car doesn't start properly. if it does condemn the regulator. good luck to you.

Answer 5

in the previous you spend any further money on aspects, spend some on a restore instruction manual and kit. It probably is the injectors or tension regulator, perchance the pump. you will get a multimeter, gasoline tension guage, and restore e book for probably decrease than the O2 sensor fee. Use the e book and multimeter to purpose something of the sensors, and the strain guage to purpose the pump and regulator for valuable tension and leak down.

Answer 6

Check vacuum. Try to disconnect the vacuum line to the EGR valve,plug it,and test engine again!:-)=