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Had a code 14 on a 93 pontiac sunbird temp hand doesnt go up much at all has new thermostate and temp sending unit . runs like new when cold runs 5-10 minutes then wont take fuel good surges back fire through plenium . thinking that the tempature is the problem
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Disconnect the temperature sending unit wire connector for the gague ( not the one for the computer ) with the key on. The temp hand should stay on cold mark. Next, ground the wire and the temp hand should go to full hot indicating the gague and wiring to it are ok. If ok suspect a faulty temp sending sensor if the cooling system is full and properly bled
I have a 1992 pontiac sunbird with a 3.1 v6 engine.My car would crank over but no spark at the plugs.The problem was the crankshaft sensor was bad.The crankshaft sensor is located on the firewall side of the engine just above the oil pan cover.Mine was hard to get out, the plastic on it was brittle and you only had enough room to get one hand in the hole to work on it.
Sounds like you may have a problem with your coolant temperature sending unit or thermostat, locate your sending unit, unplug the electrical connector run a jumper wire across the 2 wires inside the connector the gauge should read hot when the jumper wires are connected and when you remove the jumper wire it should go back to cold this verifies your gauge and all related wiring are working properly, if it doesnt work as described you either have a wiring problem or a bad temp gauge, next if your heater output is suffering you more then likely have a weak thermostat staying open or partially open replace the thermostat with a new unit, however if you arent experiencing any heater trouble replace your coolant temperature sending unit because your thermostat is more then likely working properly.....
There is a temp sending unit on the engine, it sends a signal to the engnie computer which provides a ground to turn on the fan relay. You might want to check the relay for the fan, I believe its on the passenger side just aft of the strut tower but dont quote me on that.
have you tried replacing the electronic spark module located inside the distributor cap. its a thin flat plastic and ceramic piece that has about four wires going into it.
have you chg. any thing lately like thermostate? added any coolent to system? if not, thermostate could be stuck in the open position. if stuck open, setting still, it will throw heat, but moving coolent flows to fast and does not get a chance to get hot. if you did chg. thermostate it could have a air pocket in the system. and also adding coolent can create an air pockets too. you will know this when your traveling down the road and temp guage fluctuates up and down. witch means air in system.
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