Just a few ideas - might be rubbish!
Hi all,
I've got a bit of a problem with my Merc.
It revs up ok, but when it gets to about 4400rpm, the ignition cuts, like it's hitting a rev limiter.
I'm stumped, I've replaced virtually everything on the ignition, and I'm running out of ideas.
I need to get it sorted by tomorrow, or I'll be taking my Merc lorry round Blyton on Friday!!
Cheers Frank.
Sounds like the cam position sensor. Does it crank longer than normal before firing. Also is cam tining correct? Or if belt driven the tension correct
Sorry, should have said, it's a 1982 2.8 straight 6, with Bosch electronic distributor ignition.
So it hasn't got a cam sensor, or anything like that, it's only 1 step away from points ignition.
Fuel pump? struggling to cope with higher fuel delivery? restriction in the fuel line?
Just a few ideas - might be rubbish!
No it's definitely ignition, as I've had the timing strobe on it, and the light starts cutting/pulsing when the engine hits 4400rpm.
Hi is it automatic
Does it have a mechanical rev limiter type rotor arm? If so, glue it so it can't move.
Is there constant power to the +ve of the coil and pulsed to the -ve side?
rev limiter in the rotor arm ? spring goes soft ..... vw golfs , maybe the same .
Nope,
I've swapped the rotor, it made no difference.
I've checked the power to the coil, that's fine.
The spark is perfect.
It looks like the distributor is buggered, if the 1 off my spare engine isn't any good, it looks like I'll be looking for passenger rides on
Friday 
Bring it along anyway. You can play with my Turd whilst I fix your barge.....
quote:
Originally posted by owelly
Bring it along anyway. You can play with my Turd whilst I fix your barge.....
Well, I've got the timing light...
quote:
Originally posted by owelly
Bring it along anyway. You can play with my Turd whilst I fix your barge.....
Well, it's not looking too promising, I've just come in, while getting the timing set up, the starter has died, and I think the
over-complicated fuel pump relay has spat it's dummy out again.
I'm going to have tomorrow on it, maybe into the night again, if I can't sort it, I'll come Friday morning and try to blag as many
passenger rides as I can.
I think I'm going to have to spend some serious time on it this winter...
Matches on standby
You may as well fetch it over teatime then at least you can have a beer whilst trying to fix it mate
I'll bring an axe.
At least we can have a decent fire
I'll be over tonight, I just won't have a car
It's just too much work for today, along with the stuff I've got to do for the chippy, and the fair, before I leave.
Edit: I wonder if Richard will let me run the lorry...
[Edited on 19/9/13 by fha772]
That's a shame, especially after all the work you've put in to organise it. I can't see you having any problem blagging rides though.
quote:
Originally posted by fha772
I'll be over tonight, I just won't have a car
It's just too much work for today, along with the stuff I've got to do for the chippy, and the fair, before I leave.
Edit: I wonder if Richard will let me run the lorry...
[Edited on 19/9/13 by fha772]
Or swing by Gaz's and trailer the MR2 down there maybe?
quote:
Originally posted by fha772
Sorry, should have said, it's a 1982 2.8 straight 6, with Bosch electronic distributor ignition.
So it hasn't got a cam sensor, or anything like that, it's only 1 step away from points ignition.
Is it time for a nodiz ?
After spending the day thinking about it, I think the Merc needs an ignition upgrade...
...the question is, what do I go for? Megajolt? Nodiz? Or, another?
123 ignition?