How is your battery? Check the voltage. A low battery can cause weird problems on some cars. A quick check with the voltmeter can verify. Check it with the engine off, engine on at idle and at higher revolutions. Should be above 12v with engine off. Should be somewhere around 12-14 with the engine running. Shouldn't go much over 14v when the engine is revved.

 

Battery is good. Fairly new too

 

Did you check the voltage?

 

I did. It seemed fairly normal. Went between 12.5-13.4

 

that was 12.5 when the engine had been off for awhile? thats a mostly charged battery. and 13.4 when running? that means the alternator is working .... if it went BELOW 13.4 while running, then the alternator is having issues.

 

Yeah 12.5 after hasnt been running and 13.4 while running. It sometimes wont start but then after a few minutes starts right up and runs for a minute before cutting out

 

Update. Issue is fixed.

 

what fixed it ?

 

Wiring to fuel pump relay was messed and not connecting properly

 

huh. with the integrated fuel/relay panel on the 740/940 being in such a protected location behind the ashtray and on top of the transmission hump, I have trouble seeing how that wiring could get messed up. I did have one relay socket on one of my 7/9's loosen up such that it made a flaky connection, this was because someone had stuffed a extra wire into it for a cheesy stereo install. I had to pull the relay panel, extract that pin socket from under it, and carefully pinch it back together so it would get a firm grip on the relay blade, and rewire the car stereo properly.