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Old 08-12-2017, 01:18 PM   #1
89v240g
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Default B230 no start problems

Ok, so my 89 240 sedan will not start. Last week the fuel pump went out then the relay would not click after check relay to make sure it wasn't that I read somewhere on here that the ecu ground might be bad so as a temporary fix I put the ground on a toggle switch. It ran fine but now the car won't start and is flooding itself. Pulled the plugs covered in gas with the fuel cut off the engine will stumble to start but obviously won't cause there's no fuel but the minute you turn fuel on it floods. I have replaced the coolant temp sensor and have a new air mass meter on the way. What else could it be that is making it do this? Thanks guys Ben
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Old 08-12-2017, 01:40 PM   #2
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Old 08-12-2017, 08:11 PM   #3
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Old 08-12-2017, 08:15 PM   #4
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Originally Posted by 89v240g View Post
so as a temporary fix I put the ground on a toggle switch. It ran fine but now the car won't start and is flooding itself.
How long was it running "fine" before it started "flooding itself"?
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Old 08-14-2017, 11:36 PM   #5
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3 or 4 days, I replaced the cold start injector also
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Old 08-15-2017, 12:37 PM   #6
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Have you done any tests such as the ones in my sig?

Asking why your car doesn't start with no diag info is useless.
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Old 08-15-2017, 10:27 PM   #7
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I it runs with the injectors unplugged and using starter fluid. Not the pumps i can hear them and also took fuel feed line off of rail and getting fuel, fuel pressure regulator? Stuck injector maybe? Please help
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Old 08-16-2017, 12:31 AM   #8
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I it runs with the injectors unplugged and using starter fluid. Not the pumps i can hear them and also took fuel feed line off of rail and getting fuel, fuel pressure regulator? Stuck injector maybe? Please help
Hearing them doesn't indicate it's getting to the correct pressure.

But always check for spark first. Follow ZVOLV's guide then get back with more info.
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Old 08-16-2017, 01:36 PM   #9
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Sounds like it really could be flooding. The fact that it runs on ether means it's likely a fueling issue.

You can pull the rail and reground the ground wires and then power the fuel pumps or crank, with the injectors unplugged for safety AND ignition disabled, and see if they leak.
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Old 08-16-2017, 08:29 PM   #10
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See if the injectors are leaking?
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Old 08-16-2017, 09:15 PM   #11
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Injectors are not leaking just did what u said
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Old 08-17-2017, 11:16 AM   #12
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Disable ignition, pull fuel rail, unplug all injectors but one, reground ground wires, spray injector into bottle and see if anything comes out.

These are low tech, no tools methods.

Common problem on 1989 240 is crank sensor.
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Old 08-24-2017, 01:39 PM   #13
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How long should the injectors stay open? My car has a remanufactured ecu last 3 digits are 951. Also just replaced crank sensor a few minutes ago and still no start.
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Old 08-24-2017, 05:11 PM   #14
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Dude, you gotta get some tools on there.

Do you have injector pulse? For the cost and effort of a crank sensor you could go spend $10 at the parts store for a noid light kit. Or for free, screwdriver handle to your dome and tip to injector. Buddy cranks.

If you have injector pulse, and sprak, that leaves fuel pressure.

Have a buddy crank while you test for 12v at the fuel pump. Yellow wire. Unplug it and check for 12v between it and ground.
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Old 08-24-2017, 06:02 PM   #15
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Dude I have tools, I have no injector pulse it's a continuous stream of fuel. Fuel pressure is at 42lbs, I have power at pump already checked that
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Old 08-24-2017, 07:00 PM   #16
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Ben,

Continuous stream of fuel!? That means your injector drivers are likely shorted. Unless there is a short to ground in the wiring before the ecu. Do you Have the correct injectors? If one puts low resistance injectors in front of a computer that is expecting high z injectors it will short out the drivers from excessive current. I have done it.

A test that comes to mind to check for a short in the wiring would be to unplug the ECU, key on, and still see if the injectors still go. You asked how long injectors should "go" and that answer is NOT AT ALL unless the engine is being cranked.

I'm curious what fittings you used and where you tapped in for fuel pressure test.

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Old 08-25-2017, 11:42 AM   #17
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It was not stated prior that the injectors were full ON. Noid or test light Tools would have revealed this without pulling the rail.
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Old 08-25-2017, 12:40 PM   #18
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It was not stated prior that the injectors were full ON. Noid or test light Tools would have revealed this without pulling the rail.
I don't think "continuous stream of fuel" is saying the injectors are on. I think he means the fuel supply, as in delivery stream measured by running the return line into a jug. Maybe I'm wrong.

Why doesn't anyone suggest the mode 3 diags. They test the ECU outputs. No tools needed. Not even a screwdriver.
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Old 08-25-2017, 01:58 PM   #19
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Beacuse internet diag is bull****.
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Old 08-25-2017, 02:20 PM   #20
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Beacuse internet diag is bull****.
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