1990 240 DL Fuel System Issues

trixsta587 · Post by **trixsta587** » 13 Jan 2014, 14:45

Okay, so recently I went to go start my car and it would just turn over and not start. It was acting as if it were getting 0% fuel or spark. I let it sit with the key on for 1 minute and it starts up just fine and will run fine also. I'm assuming it's taking this minute to pressurize the fuel system, but I just can't figure out what exactly is causing the issue. Any ideas?

lummert · Post by **lummert** » 13 Jan 2014, 15:25

Fuel pump check valve?

trixsta587 · Post by **trixsta587** » 16 Jan 2014, 16:36

Okay, so I've replaced the fuel filter, fuel pressure regulator, ignition coil, ignition rotor. I checked all the spark plugs, tested them and the spark is perfect. I've tested both fuel pumps, and I have verified that I am getting gas to the engine. It still just cranks and cranks, and occasionally after a while it will finally start. Its acting as if its flooding the hell out of the engine (I used to be a jet ski mechanic). I am beginning to lose hope in this car.

daveybeee · Post by **daveybeee** » 16 Jan 2014, 17:27

Look at the flywheel pick up sensor...AKA the reference sensor. On top of the transmission behind the cylinder head. Look for outer shielding coming unraveled near the sensor where it mounts. Other than that, I dunno...

ddriel · Post by **ddriel** » 17 Jan 2014, 13:56

Hi, I have had the same kind of problem with my Volvo 240. By me It was the fuel relay. After replacing no problems.

trixsta587 · Post by **trixsta587** » 17 Jan 2014, 16:16

I will check the reference center.
I just tested my injectors, and to ground I am getting 2 volts. Which I'm assuming is not good.
I replaced the double relay about two years ago when I had similar issues. Bit do you know of any ways to test it?

trixsta587 · Post by **trixsta587** » 21 Jan 2014, 13:41

So, it turns out it was my ecm. I'm guessing some internal relay for the fuel system got fried. I bought a new one and installed it and it started right up and ran fine. But now I went to start it again, and the ecm is toast again! What the heck is causing this?

lummert · Post by **lummert** » 21 Jan 2014, 13:56

Most likely have a short somewhere in the wiring harness.