So I had it in the shop for about 2 weeks, got everything sorted. Took a small road trip 4.5 hours round trip. It's about 12°f here... starts but won't stay running. Haven't checked anything yet but no check engine light shouldn't be anything with the radiator. Evap lines did have leaks but were fixed. Any ideas? Non turbo, new battery, recent oil change, thinking FPR? Not sure it would start at all if that was the case but I can only hope for something easy.

 

Have you replaced the coolant temp sensor?

 

Yes, was done while in the shop.

 

you can test the ECT - its under the thermostat housing cover (follow the upper radiator hose to the top of the block). you should find the connector off to the side (not the easiest connector to open sorry to say) when cold you should see a high resistance (google for an ECT resistance chart) I use the 300/3000 rule (fully warm engine is 300 ohms or lower, cold engine (say 70F or lower) would be 3K ohms or more. At winter temps, the resistance should be in the 5K to 10K ohms range.

Also are you parking outside in very cold temps? you may have some ice in a fuel line - where a can of HEET or similar may help (if you can get the car into a garage). If the ECT looks normal then you may want to measure fuel pressure at the rail.

Final question was when was the last time the car had a full tune up - plugs/wires/rotor/cap?

 

Ended up just being the fuel pump, replaced now with no problems. Just drove it another 7.5 hour round trip Thanks!