car runs for about 2 seconds then dies. I unplugged the coolant or temp sensor located next to the thermostat on top front of the motor and it ran fine but at a real high idle. thought sure that was my problem. installed a new sensor, plugged it back end but car only ran for a couple seconds. I unplugged the sensor and car ran fine again but real high idle. I decided since the car was running now I could take it to the shop. I started it once more with the sensor disconnected to see how long it would run before I got out on the road. It did run for 3 minutes or so at high idle but then died and now with the sensor plugged or unplugged it will just run for a few seconds. The battery was bad and I replaced it but still the same problem. I also changed the fuel filter. It the fuel pump is bad I would not think it would have run for the 3 or 4 minutes or so. Need help, would like to take it to Cruising the Coast next week.

 

I would suggest you start by actually measuring your fuel pressure. Otherwise you could spend lots of time and money changing parts you do not need. It is always great to be able to observe your actual fuel pressure and state 'It is definitely not a fuel pressure problem'.

 

Measure the resistance of that new CTS. It should be ~2-3K ohms cold and only about 200 ohms at 200 degF. You may have purchased a bad unit.

 

Every tbi guy should have a fuel pressure gauge. May be the fuel pump or like in my situation, a bad rubber fuel line in the tank. They get old and split. Mine was like mush went I took it out.

 

also check the oil pressure switch and relay. the relay will allow fuel without oil pressure for only a short period to enable startup, but once it is running, it will kill the fuel pump if it doesn't sense oil pressure after a few seconds.