Vehicle & Technical > Range Rover

efi 1987 won't start

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zulublue:
Hi Rob, this sounds familiar to me, I have just had an efi put i to my 82 rrc, i have an external pump fitted for fuel but found it a bit powerful, so fitted a regulator to it, anyway my plugs were getting soaked to start so I knoced the reg back a bit, no difference, the garage finally got it going by fitting a new (original) disie cap, HT leads and new plugs.

Yes it was the last thing I thought of, but it worked. must be worth a try, fingers crossed for you.

big rob:
update on my problem.
so I have swapped everything over from another 3.5 efi which runs ok.
everything which has been swapped works ok on the good car.
ecu, air flow meter, leads, dizzy cap rotor arm ,coil,new plugs, relays and fuses, fresh petrol.
fuel regulator was last thing; and it was noted that there appears to be no vacumn to the back of the regulator, when the good car is turned over petrol is returned to the tank, but on the bad car no petrol is coming, so the regulator isn't opening due to no vacumn I've checked the pipes and all seems ok.
why would there be no vacumn? also it seems the advance pipe on the plenhum chamber is also not producing a vacumn.
I got some spark testers and the spark is as big as the one on the good car
What next any ideas? I don't want to scrap the car as I have done a lot of work to it and is fully kitted for offroading and I want know what has gone down on the car so we all know in the future if the problem comes up again, the car was running fine just a fortnigt ago and has only been run for 10 mins at a time.
any thoughts , Rob

Range Rover Blues:
The pressure reg on the fuel line has a vac tapping tot hge plenum so that the fuel pressure is 27psi or whatever above manifold pressure, that's all.  It should still do something if open to atmosphere.  Either the reg is stuck shut or the fuel isn't getting to the engine bay.

The vac advance won't do anything 'till the engine is running.

big rob:
well it looks like i have the answer.
It appears that the compression has been lost,which explains no suction/ vacumn.
i have been told that the rings could have seized to the pistons or moisture has got to the valves and has  jammed the valves open.
so I am going to spray some oil into each pot and turn the motor over and allow mr wd40 to do his magic, the i will turn the motor a few days later and blow out the oil, then I will do another compression test and put the plugs back in and with a bit of luck it should fire.
 if not then I need to make a dicision as to strip the motor and clean and lap the valves or break the car.

Range Rover Blues:
Don't use WD40, use Redex.

I'd be surprised if this is the only problem causing the reluctance to start, but you say it's been stood a while so who knows.

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