Thread: Loss of Power in Series 3

Fuel delivery problems?

I have noticed the same onother peoples Rangies whilst on wierd angles offroad

Sounds like fuel or could be aircleaner

Petrol or diesel?

Loss of power on hills with a petrol engine is usually a partial fuel blockage (tank, pump, filter or in the carburetter), but ignition problems can mimic this, usually points have closed up or occasionally high tension leads or other problems such as coil or condenser or plugs.

With a diesel it will be a partial fuel blockage either the tank, lift pump or most likely filter.

With both diesel and petrol, one not uncommon problem is the strainer on the fuel pickup in the tank getting partly blocked. A bit of dirt under a valve in the lift pump will also have similar effects.

Make sure that you don't have a cooling problem that is allowing overheating on hills - could be any of the usual suspects, the most likely being a loose belt.

With petrol engines a rare cause is a loose connection that cuts the ignition on steep slopes, but this usually causes a complete cutoff and is clearly related to slope.

John

Check your fuel filters.
Blow out the fuel lines.

if it persists,

Check the needle & seat & float (carby)
Other fuel problems could be "flakes of dirt" partially blocking the pickup in the fuel tank.

Otherwise, as JD said - Ignition.

Typically points or condensor, unless you're using really cheap HT leads.

Thanks as always for your suggestions guys.

And it was running so well...

A LPG conversion should fix and fuel delivery problems.

I've had fuel problems in my series 3 going uphill before, turned out the float in the carbie was set way too low and there wasn't enough on the steep uphill slope.

I agree with pehonix although having the float set too high can give similar problems with the carby flooding, not a problem at high rpms and partial throttle but when you get to wide open and the engine revs drop it gets lazy and blows smoke.

It could also be a fault in the mechanical and vaccume advance units going off spec, when you pull the top off the dizzy to check the points and condenser have an eyeball.