Trying to solve a no start on a 1990 245. The car ran fine and then when tried to be started after leaving a house it just turns over with out starting. Changed out the 25 fuse, replaced the FI relay and jumped the pump. I almost think the in tank pump wasn't sounding but I then was for sure if it should run when jumping from 4 to 6. But the car engine light came on while on the freeway on the way to the house it wouldn't start at. The codes would not appear after unhooking the battery. I didn't get them in time and nothing was appearing from cranking the car. Thought maybe the CPS would show a code if I was cranking it? Anyways, I've got to jump the rear pump still.

Just wondering because there is no smell of fuel after all the cranking.

It was a bad CPS. I found a good white band used out of a 740. I also cleaned the fuse panel and replaced some fuses. The old CPS had bare wires and the insulation was so weak that it just fell apart. I knew over a year ago that the part should have been replaced but totally forgot. Its a friends car that I've been helping him with. Trying to save one more volvo from the demise of a scrap yard.

Do you have spark?

You should get these codes if the Crank sensor is intermittent or bad, look for bad insulation at the sensor

From socket 2 - a code of 1-3-1 Ignition system RPM signal missing on starting Wiring fault or RPM sensor bad Engine will not start

From socket 2 - a code of 2-1-4 RPM sensor signal absent intermittently Faulty RPM sensor, wiring or incorrect installation Engine will not start;

Dan

Is this a B230 engine? Go to www.stepbystepvolvo.com for free guide to 740 no-starts. Do the normal: check for spark, then fuel at fuel rail with in-tank fuse pulled. Those tests will help isolate the issue.

I put the ignition wire to the distributor near a bolt on the strut tower while someone turned it over. It showed spark. But the amount the engine has been turned over I think there would be a hint of gas when smelling the engine with the oil cap off. No strong fuel smell.

The insulation on the crank sensor is falling off even at top. But won't a car with the rpm sensor in the distributor keep the fuel from happening when you turn the car over? So wouldn't cranking the car with a bad crank sensor keep the car from being flooded? Not sure about it.

I listened for the pre-pump through the gas filler hole and couldn't distinguish a sound coming from the tank. But usually it seems like a pre-pump goes out slowly and you get some symptoms like cutting out or rough running. Not good one minute bad the next. Kind of weird.

If a timing belt skips a tooth wouldn't the car still start? I changed the timing belt this week on the car but it was driving fine for a couple days. Plus the the check engine light came on during the last drive before it stopped. Not sure why the tester isn't working either.

Could be the main fuel pump. Isolate per my instructions on www.stepbystepvolvo.com. Also, watch out for spurious results. On my latest no-spark (1987 740 turbo), I got spark sometimes and later on got no spark. Finally the engine stayed dead and I could isolate the problem. Turned out to be a short circuit in Hall plug wire, which fried the Hall sensor.

1. When I've had in-tank pumps fail they just fail - there's no effect on car operation. When the hose between the sender tube and the in-tank pump goes, it starts cutting out and then won't run until you add fuel.

2. Is the main fuel pump running?

3. squirt some fuel into the intake manifold. If it starts right up, there it is.

4. I'm sure you know a frayed CPS wire means the unit is about to fail.
--
240s: 2 drivers and some parts cars

You have spark so the crank sensor is doing it's job hopefully the TB is timed correctly. If it is new and tensioned (not loose) timing should be fine. It was running correct? For now assume the timing is good.

The insulation on the sensor is bad and should be changed very soon but if you have spark it is good for now.

The main pump should run with a jumper across the left side of fuses 4 and 6. Don't worry about the in-tank pump for now it won't keep the engine from starting if the fuel system is primed. Does the engine run with the jumper on? If it runs and you know the relay is good remove the jumper and do one more thing.

Do you have a pink label 561 ECU? These have a habit of going bad and not providing a ground to the fuel relay so the pumps will not run. You can provide a ground to the blue/green wire of the fuel pump relay connector. If it starts with this ground attached the ECU is not providing the ground to the relay and you have a bad ECU.

Dan

Thanks for the help.

The main pump could be heard when turning the key. Jumped the main with paper clip from right side of #4 to left of #6. Was it suppose to be left side #4 to left #6? Now I'm trying to remember if I got the pump sound.

Switched out the fuel injection rely with one I thought was good. Replaced 25 amp fuse. Wiggled the rpm/crank sensor while trying to start. FPR is new with no bad smell. AMM disconnected w/ no change. Checked the ECU label and it wasn't pink. Tested for spark by holding the ignition cable to distributor near the strut tower nut. It showed spark.

Did not clean battery ground. Did not have a volt meter on hand so no electrical tests.

Usually if you have fuel and have been cranking the engine excessively then there is some smell of fuel in the engine. But I smell only oil. That right there gives me reason to believe the in tank pump is not delivering fuel to the main.

Would there be fuel pumping/ spraying through the injectors if the RPM/ crank position sensor was bad?

My plan is to get a rmp sensor ASAP. Looked for one on a 740 turbo but couldn't see it on the bell housing. Someone on the 700 board pointed out it might be an earlier model. I'll try another yard tomorrow. Needs replaced either way but don't want to wait days for new one to be shipped.

I'll be jumping pumps again along with jumping rely and grounding ecu tests.

If you have spark the CPS is good.

Do you have fuel?
Take a plug out and see if it is wet.
Dan