Still problems AFTER rolling rd

[stu e]

With Lumenition ignition, your plug gaps should be 0.6mm, smaller than for the standard ignition. Also the combined resistance of the coil and ballast resistor should be at least 3 ohms, which is why a coil from an electronic ignition is no good the resistance is too low.
HTH Stu.

[Sidecarbod]

Originally Posted by chr15w

The engine will accelerate well to all revs in 1st - 3rd but on Mway it doesnt like to rev above about 2700 in 4th & 5th

Could well be a fuel starvation issue then like the others have said. I'd run the "one minute" test as see what the results are if I was you.

By the way when I did the test I could not find a measuring jar that was large enough so I devised a cunning plan!

I used a large clean dry plastic milk container to collect the fuel. I then marked the level of the fuel then poured it back into my tank. I then filled the container to the same level with water. As water weighs 1 gram per cm3 you just have to weigh the water. In my case it was just under 2Kg, hence just under 2000 cm3.

It really is worth doing this test, Alfiebeard was having problems, this test showed that he had a duff fuel regulator.

HTH,

Pete

[Sidecarbod]

As the engine revs right round in all the lower gears my money is on a fuel issue. The ignition system does not care what gear you are in. The fuel system could have problems that don't show up in the lower gears as the "load" on the fuel system is low.

Pete

[TINKA]

Had a very similar problem to this a few years ago, WOT in 1st, 2nd, 3rd and 4th was fine but in 5th it just started to spit and cough. In the end (thanks to Chris Purple AK) I found a fitting on a fuel filter was crimped allowing it to suck air and this only showed when on WOT for a longer period. New filter problem solved.

[Purple AK]

Originally Posted by TINKA

Had a very similar problem to this a few years ago, WOT in 1st, 2nd, 3rd and 4th was fine but in 5th it just started to spit and cough. In the end (thanks to Chris Purple AK) I found a fitting on a fuel filter was crimped allowing it to suck air and this only showed when on WOT for a longer period. New filter problem solved.

I believe it also caused a starting problem if left unstarted for a while?

[Happy Jim]

It's worth a quick blast with the filler cap open just to rule out any chance of a tank breather problem.

Jim

[slogger]

Chr15w, is your fuel pump one of these?

A lot of the early RV8 Dax had them fitted and the screw in canister is a filter that gets blocked with crud from the tank.

These solid state pumps are only just man enough for the Rover and yours maybe past its best and may benefit from a filter change. I have one of these pumps with filter somewhere. It looks a bit sorry and could be in worse shape than yours, but you are welcome to try it.

Good luck

Ian

[chr15w]

Originally Posted by slogger

Chr15w, is your fuel pump one of these?

A lot of the early RV8 Dax had them fitted and the screw in canister is a filter that gets blocked with crud from the tank.

These solid state pumps are only just man enough for the Rover and yours maybe past its best and may benefit from a filter change. I have one of these pumps with filter somewhere. It looks a bit sorry and could be in worse shape than yours, but you are welcome to try it.

Good luck

Ian

Thanks for your offer Ian. I think the problem is fuel supply.
Ive just done the fuel supply test suggested in an earlier reply and the pump produced about a 1/2 litre in a minute which is well below what the poster expected.
I have a Facet fuel pump which is about the size and shape of a coil so Ive decided to replace it with a new one. I couldnt see any filters between fuel tank and pump so assume its in the pump itself
Will post results

[craggle]

The filter in the pump is not meant to be used as the inlet filter, It is only a last effort to save the pump if anything gets through the first filter.

It states in the Facet instructions that the warranty will be void if no pre-filter is fitted.

The pump may be fine if you just clean it out and fit a new filter before the pump. The bottom of the Facet pump comes off if you turn it with a large spanner. The filter is underneath this cover.

Craig.

[Sidecarbod]

Originally Posted by chr15w

Ive just done the fuel supply test suggested in an earlier reply and the pump produced about a 1/2 litre in a minute which is well below what the poster expected.

You could not run my lawn mower on that amount of fuel! (well you could but you know what I mean!)

That is definately a problem, it still might not be the pump, there could be a filter hidden away somewhere. At least your getting somewhere with regards to solving the problem.

Pete