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Thread: engine stalling 93 RRC v8

  1. 19th February 2012, 12:21 PM #1
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    engine stalling 93 RRC v8

    Okay I have experienced my first real issue since putting in the motor lol.
    Today on my way to church about a mile down the road the engine lost all power for about 3 seconds then it jumped back in to life again running perfectly. About 15 seconds later the same the thing. I decided to turn around back home. It then ran good for about a mile. So I turned around and said stuff it. After turning around it started to stall on and off, not dying completely but just running. This did this all the way home. Just nowafter coming home I thought I'd let it idle. After about 5mins of idle she just started to splutter then die. I've tried to start it again but it just splutters.

    1. I don't have a fuel gauge but I filled it up 250km ago and it's got a 140L tank so I don't think it's fuel.

    2. Ever since I put the motor in I've noticed it really losing power after 3500rpm. I thought it might be the cam but now I'm thinking fuel pump.

    When it was idling the fuel pump was constantly on. I'm not sure if that's normal. I could notice a very slight change in pitch now and then but barely noticeable. It has a new ( 3 month old Bosch coil pack in it so I don't think it's the coil pack.

    3. When turning the ignition back on I can't hear the fuel pump start for a few seconds then switch off. Maybe it's still primed and doesn't need to?


    That's about it for now, Any thoughts? I'm leaning towards fuel pump/electrical problem.
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  2. 19th February 2012, 12:41 PM #2
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    It barely runs now, very low rpm and will only stay on for about 10 seconds or less then dies. During this time I got my wife to listen near the fuel tank and we can't hear the fuel pump. I pulled out a spark plug and it's dry. I wish I had my fuel pressure gauge installed lol. Rocking the car I can hear plenty of fuel sloshing around. I guess I should be looking at the fuel pump relays first...... Located under the drivers seat somewhere?
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  3. 19th February 2012, 01:22 PM #3
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    Just get a new Commodore pump, and put it in. Bosch part number BFP772. Also a new fuel filter. You can use a tyre gauge on the fuel rail if there's a schrader valve present. Fuel pumps on those don't pre-prime, they run when you turn the key to crank. You should hear the pump for 1 second after you stop cranking if it's working.
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  4. 19th February 2012, 01:39 PM #4
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    bee utey,

    It doesn't want to start at all now. I thought I'd use the kiss rule. I'm getting no spark from the coil now. I thought I'd try another coil but still no good. And I just tried to hear the fuel pump and can't whilst cranking and after. So I have a major eletctrical problem.
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  5. 19th February 2012, 02:00 PM #5
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    Time to fish out the multi meter, see if there's power to the coil, it could be an immobiliser issue too. No ignition = no signal to the ECU, no fuel pump. Check all the connections on the coil are tight.
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  6. 19th February 2012, 02:58 PM #6
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    yeah there is 11v on neg side on coil with ign on. reads 0v with ign off. Connections are tight. Any other tips? I have rave but it's for the 95 classic which is quite different. Battery has 11.94v and drains to 10.98v whilst cranking. Radio, ABS pump,seats etc all work okay. mmmmmm
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  7. 19th February 2012, 04:03 PM #7
    PLR
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    G`day ,

    your fuel pump should prime don`t know what pre-prime is .

    You should be able to turn the key on to get idiots ( not to crank ) and have time to walk to near the tank/filler and hear the pump running .

    It should run for 3 or 4 seconds before shutting off .

    Peter
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  8. 19th February 2012, 04:22 PM #8
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    No life in fuel pump and no spark I don't think the immobilzer is even connected, I've never had the fob think work plus never had central locking working either. I've checked just about every fuse in the car. I haven't checked fusible links yet though.
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  9. 19th February 2012, 04:34 PM #9
    PhilipA
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    Did you have the lower dash off on the Rh side for any reason? Maybe a connector near the ignition switch. Do the dash lights come on?

    Re the central lock. If it is like my 92 then the connector controller is up above the steering column and points down so can fall out . It is held by a coupleof clips , but mine fell out recently when I fitted the temp gauge.
    Regards Philip A
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  10. 19th February 2012, 04:49 PM #10
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    I did about a week ago when installing gauges. I have the cover off now and have checked all plugs etc. All dash lights come on, headlights work etc. The motor turns as normal but no spark from coil and no fuel pump. If it was immobilzer then I thought I wouldn't be able to turn motor. I measured one of the wires on the coil and got 11v with ign on & 0v off. Which ones should I expect to see voltage? I could only get the wire that comes from the same loom as the maf sensor to read voltage. I'm not sure what I should be getting from the one that runs on top of the alternator with the twin plug connector. I have the Bosch conversion system.
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