I have a 1989 Cutlass Supreme 2.8MFI V-6. It will start and run fine for 20-30 Min. Then just shut off. When you try to restart it will kinda try to start but wont. The only Trouble Code I have is 45 Oxgen Sensor Rich Error. Oil pressure Is fine. If I let the car sit for couple hours, will restart problem all over. What would cause the car to do this? Fuel leak, Bad O2 Sensor?
2007-01-13 09:33:41 · 10 answers · asked by Jonny Boy 1 in Cars & Transportation ➔ Maintenance & Repairs
If it seems to be heat related, next time it will not start, i would check for spark at the plugs. If none, probably a bad crank sensor or ignition module. Good luck
2007-01-13 09:42:23 · answer #1 · answered by TonynNC 5 · 0⤊ 0⤋
I would say its either the Crank position sensor, Ignition module, or fuel pump.
When it shuts off, does it shut off right now? Or does it sputer a few times and then turn off?
If it sputters, i would say it is a fuel related issue (pump/filter)
If it shuts off right now, i would say it is ignition (crank position sensor/ignition module)
You can buy a fuel pressure gauge at your local parts store, and install the gauge on the fuel rail ( there is an easily accessable port for this on the fuel rail) Install the gauge with the car off, then start the car, and monitor the gauge. If it starts to drop pressure then die, you have narrowed the problem down. If the pressure stays steady, i would start looking into the ignition system.
Either the ignition module or the crank sensor is where i would be looking.
Good luck.
Kevin
2007-01-13 09:45:02 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Bad O2 sensor will shut down fuel pump in tank at the relay. O2 sensors are easy to change, though. Just unplug, and unscrew from exhaust manifold. Purchase one at the auto parts store first, then you will know what you are looking for.
2007-01-13 09:57:45 · answer #3 · answered by Tinman_2_54 2 · 0⤊ 2⤋
Another option: check in the trunk for a switch. Some Cadillacs come with a fuel shutoff switch that will trip when the system's been messed with. Also if your car has a security system it may be shutting down your fuel pump to prevent theft. Try disarming and rearming it (if you have one). Barring that, I'd suggest calling your local garage and asking for advice.
2016-05-23 22:00:58 · answer #4 · answered by Elaine 4 · 0⤊ 0⤋
hrmmm the heater in your o2 sensor might not be heating up enough or fast enough, replace the o2 sensor. check the spark, check if its getting enough fuel and the pressure. your engine is running rich when its running so i would look at the Mass airflow sensor and the throttle position sensor.
2007-01-13 09:40:03 · answer #5 · answered by ke6mdw13 2 · 0⤊ 1⤋
Easy. The valve clearences need checked. As your engine heats up the metal expands slightly causing less fuel or / and oxygen to get into the chamber. A pressure test etc. will identify the culprit(s)
2007-01-13 09:44:32 · answer #6 · answered by Merovingian 6 · 0⤊ 1⤋
could be plugged fuel filter /bad pcv valve/ecm//electroniccontrol module// not reading correct volthag// bad fuel pump in tank//or intermittent problem in coil of distributor
2007-01-13 09:40:18 · answer #7 · answered by toadyboy 4 · 0⤊ 0⤋
yes it's your O2 Sensor have that replaced and it should run good again
2007-01-13 09:40:06 · answer #8 · answered by davedebo198305 4 · 0⤊ 2⤋
get the alternator check...it might have to be replaced
2007-01-13 09:36:41 · answer #9 · answered by HAPA CHIC 6 · 0⤊ 2⤋
lack of petrol
2007-01-13 09:36:22 · answer #10 · answered by ? 4 · 0⤊ 2⤋