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I've had this car about three weeks, I'm an old guy and I got it as something to tinker with. It sat for about ten years in a driveway with a tarp on it. Fuel tank had been emptied, I put about five gallons of premium 100% gas in it. Guy I bought it from said he had it running for about five minutes and couldn't keep it running. When I first got it, it would hit for about a second and stall.
Cam is turning, replaced fuel pump relay, getting fuel smell in engine compartment when cranking and fuel coming out of injector rail, getting spark on number one plug (the only one I tested). Cranks good, will not start. Have not checked fuel pressure or compression, but fuel pressure seems to be strong. I blew through the vacuum line and felt good resistance on the fuel pressure regulator.
Thought it might be a crankshaft sensor until I realized it didn't have one, has a Hall Sensor, that should tell you I'm a newbie to these cars.
I have heard this could be a bad ECU--I have the yellow label one ending in 544--so I bought a used one, I'm going to trade it out to see if it makes a difference.
My thoughts/guesses:
1. Fuel injectors are not coming on live--maybe ECU or bad electrical connections, although the wiring on this car looks surprisingly good.
2. Fuel injectors are all bad--maybe from years previously of ethanol gas?
3. Sensor somewhere--have no idea which one.
4. Bad ignition control module--just because I'm guessing.
This is the first Volvo I've ever tried to tinker with--I am an aircooled VW guy and those are the easiest cars in the world to work on. Any guidance on where to start first would be very much appreciated.
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