will not start
Discussion
hi,every one hope some out there can help me took griff out for a spin to chepstow coming home started to miss fire after about 5 miles cut out fuel reading nearly half full wait,s for a min or so turn,s key fires off we go ,fine for 2 miles or so happens again .to cut a long story short i, just get home , and brake down on the corner by my home pushes into garage , next day turns key fires up ticks over lik it should pulls out ont to road and pop , pop stops again , call s rac gets it started but running lumpy rac man seem to be lost as what it is diz is fine plugs coil, fine rac man seems to think petrol , but showing lots on instruments , takes to my local fitter he tops up with petrol after braking down before he gets to petrol station puts £15 in car seems ok ,ticks over the way it should again . i take it home go for a little drive to test for myself 1 miss fire on leaving home other than that goe,s fine ,takes car out in evening fires up pull out on main road pop ,pop stops pushes back into garage will not start full stop loads of petrol in tank ,put i get 2 more gallons anyway just in case naf sensor or some thing ,anyway it turns over not fireing full stop is there anyone out there who can give me some pointers as to what is going on rac, did not have aclue garage seems to think naf reading in the petrol dept i no now for my self it is not petrol any help would be great as i am at aloss many tnanks in advance paul
Was the fuel pump running after it cut out? The pump will only run for a couple of seconds after the engine stops and the noise is often drowned out by the noise of the engine spinning down, but sometimes you can hear it if you are listening for it. Also, if you switch off and on again straight away you should hear the pump run (again, it will stop after a couple of seconds).
If the pump is running I'd suspect an ignition problem. If it isn't, I'd suspect the fuel pump relay.
I'm a little surprised the RAC man didn't investigate further than fuel in the tank, they should be well used to diagnosing this is the sort of thing.
If the pump is running I'd suspect an ignition problem. If it isn't, I'd suspect the fuel pump relay.
I'm a little surprised the RAC man didn't investigate further than fuel in the tank, they should be well used to diagnosing this is the sort of thing.
Could be the ECU power supply relay?
Its the one on the end of the 'flying lead' on top of the battery with the black holder, the other one is the fuel pump relay.
That said if the fuel pump is priming then the ECU is getting power, as that relay is switched through the ECU, possibly its not getting a speed signal?
Thats provided by the coil amplifier on the side of the dizzy
Matt
Its the one on the end of the 'flying lead' on top of the battery with the black holder, the other one is the fuel pump relay.
That said if the fuel pump is priming then the ECU is getting power, as that relay is switched through the ECU, possibly its not getting a speed signal?
Thats provided by the coil amplifier on the side of the dizzy
Matt
350matt said:
..possibly its not getting a speed signal?
Thats provided by the coil amplifier on the side of the dizzy
Thats provided by the coil amplifier on the side of the dizzy
Tacho signal goes to ECU for engine spinning (from coil IIRC/revctr IIRC), and road speed from box (trickery box on later cars).
There was a case once of a faulty rev counter defeating the ecu, Clarkys old Griff IIRC ~ which exhibited intermittent cut-outs and then completely failed. Disconnecting rev counter cured the problem.
Dave
You really need to start checking you're getting the right signals at the ecu. The Bible can help here, or there's a 14CUX diagnostic manual available on the web somewhere (I can never remember where - I've got a paper copy).
It does sound a bit like your fuel pump being internittent, but it could be other things.
Aside from doing the above, I'd check, clean and possibly replace the 'metal' main and fuel pump relays - the ones loose in the loom above the battery. I'd also check and clean the 40 pin ecu connector. Make the sure the battery is disconnected first.
I live in Chepstow, so if you want to break down near my house, PM me first so we can arrange it!!
It does sound a bit like your fuel pump being internittent, but it could be other things.
Aside from doing the above, I'd check, clean and possibly replace the 'metal' main and fuel pump relays - the ones loose in the loom above the battery. I'd also check and clean the 40 pin ecu connector. Make the sure the battery is disconnected first.
I live in Chepstow, so if you want to break down near my house, PM me first so we can arrange it!!
Very similar symptoms to a tank breather blockage I had on a different vehicle. It runs then draws off fuel creating a vacuum in the tank. If you leave the vehicle for a while after it's conked out it's fine again. I'd run it till it stops and then quickly release the filler cap. If there's a blocked breather you'll hear air rushing back into the tank.
That's non specific vehicle advice as I don't know the fuelling layout on a Griff... Yet :d
That's non specific vehicle advice as I don't know the fuelling layout on a Griff... Yet :d
hi, every one manythanks for all your help ,some of the things you have said ,i have donei cleaned every relay on the board checked fuses too cleaned ECU too,i have ordered 2new fuel pump relays should have them tomorrow ,i have changed the 2 fuel relays over and every thing seems fine now someone said to give it a try so i did , i don,t know if it has cured the problem put it has not miss fired or stopped ticking over yet i have fired car up 4 times so far going fine at the moment but i have not been out in car yet i am not the rac mans best friend at the mo. ill put new relays in tomorrow and take it from there like to once more manythanks to everyone outthere for your help some of which i grasp some i don,t being a painter and not a mech,anyways thanks again paul
BliarOut said:
Very similar symptoms to a tank breather blockage I had on a different vehicle. It runs then draws off fuel creating a vacuum in the tank. If you leave the vehicle for a while after it's conked out it's fine again. I'd run it till it stops and then quickly release the filler cap. If there's a blocked breather you'll hear air rushing back into the tank.
That's non specific vehicle advice as I don't know the fuelling layout on a Griff... Yet :d
That's non specific vehicle advice as I don't know the fuelling layout on a Griff... Yet :d
getting yourself comfortable in here?
sleep envy said:
BliarOut said:
Very similar symptoms to a tank breather blockage I had on a different vehicle. It runs then draws off fuel creating a vacuum in the tank. If you leave the vehicle for a while after it's conked out it's fine again. I'd run it till it stops and then quickly release the filler cap. If there's a blocked breather you'll hear air rushing back into the tank.
That's non specific vehicle advice as I don't know the fuelling layout on a Griff... Yet :d
That's non specific vehicle advice as I don't know the fuelling layout on a Griff... Yet :d
getting yourself comfortable in here?
Just trying it on for size
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