Hi all... I've had a resurgence of this persistent engine problem again - drive the van out of the city, doing 30 - 50 on A roads, stop starting for 10mins; then get on the motorway, bring it up to speed and once I settle into cruising she hesitates, then dies off.... revving doesn't revive her and ultimately I bring her to a stop, stall, wait a moment and then restart and go.... bring it up to cruising speed... ya de yada. This was a problem before the engine rebuild, after the engine rebuild with stock old carbs and now on it's first test run with new Webers... an expensive way of not solving the problem!! It's a CJ 2.0l. electric fuel pump, pressure regulator. the only significant parts not replaced during the rebuild were the coil, dizzy and alternator. It also has a Petronix module in the dizzy and has run well on it prior to the problems. I'm wondering if it's a dizzy problem, a quick suck on the advance pipe and the plates move, but as the problem only occurs under cruising load, I didn't expect a quick suck to reveal any problems. Thanks in advance.... (that may be an unnecessary pun...) Andy.
Fuel filter blocked, petronix or HT leads breaking down, could try pulling petronix out and putting in points and condensor and see what that does. Once you got points and condensor fitted, if you open the points with a screwdriver with ignition turned on you should see sparks across points, if no spark then coil or condensor gone.
Sounds like fuel starvation or coil breaking down. Coil is an easy fix, checking fuel flow under load not so easy.
scratch that as you've cleaned the tank... was there much muck in the tank when you cleaned it? I'd be tempted to take it for a high speed run, let it stall out and pull a top off one of the carbs, see how much fuel is in the float chamber...
Buy yourself a new Brazilian coil for about 17 quid. Worth it anyway, as coil probs notoriously difficult to diagnose. Stick your breakers and condenser back on and try them out.
Fuel starvation is favourite. Check your pipes, install a clear fuel filter, check whether you have a fuel pressure limiter and that it is set correctly. Also set your fuel level at the correct height in the carb(s) and re-new your float valve and needle.
if you want to rule out your fuel lines etc then run a separate tank on a run see if it dies with that.
Welcome to my world. Since my over charging issue in Easter my bus has done this on and off in that annoying intermittent way that drives you mad. All seemed fine until Damper Jam. Weekend just gone the bus broke down twice. Starts really easily again given a moment or 2. Checked the fuel pump pressure. The pump even though it rattled and the filter had an amount of fuel in it it seems it was not really running to pressure. And as it should be 2-3 psi it's not running at a lot. New pump fitted so fingers crossed Summer Camp 2012 sees me making it. Check your alternator isn't per charging first. It plays havoc with the ignition system. Then check the fuel pressure. If your running a biset pump that works at 2-3psi you shouldn't need a pressure regulator.
Morning all... a good few things to try out there. I guess I have a day avoiding the ball ache of sanding the cargo floor in this heat!! Will report back later. Andy.
This is doing my head in!! I've changed the coil and the slightly dodgy looking fuel pump for new. I've relocated the clear filter so it's below the tank (still in the engine bay) and not pointing up, which wouldn't have helped fuel flow. I'm not sure about removing the carb to check the fuel bowl... They're new webers and just looking at them I'd need to remove the filters and linkage before getting to the bowl... Which is not an option on the little stretches of motorway outside Portsmouth!! I'm considering moving the pump down to a position below the tank too rather than up on the bulkhead. I should mention that this us all being done with low fuel, I'm concerned that if I fill it up it will skew any results!!
