This is a read-only archive of the old Madabout Kitcars forum. New posts and replies are no longer possible, but every thread is still here to browse and read.
Due to a hesitant spluttering engine, I have had to do some head scratching,during which I have decided to simplify some variables.Primarily, I have felt that I had too many junctions reducers and pipes in my fuel set up, so I have removed my swirl pot for now.I am tempted to mount my fuel filter and h.p. Pump on the passenger bulkhead, but someone said the draw isn't great....why is this the case if it is constantly supplied by a l.p. Pump from the back?.....I also noted that my h.p.pump when fitted with banjo fittings for 90 degree input and output could suffer fuel starvation if the bolt when fully tightened did not have it's stem hole in line with the banjo hole...am I imagining this?
I am just designing my fuel system but I agree simpler is better which is why I am going to modify the tank to add a sump amd do away with the the LP pump and swirl pot altogether. This system is much simpler and the sump should overcome fuel starvation because of surging (corners and heavy acceleration).
I don't think the position of the bano and the hole in the stem is critical - the body of the banjo that the stem passes through has a channel all the way round.
How have you routed / ordered your pumps, pipes and filters? Mine is like this:
And I haven't had any issue with fuel starvation / splutering.
Yes, had routed same way, and have removed as elimination for problem....have tried replacement tps, icv,injectors refurbed, new fuel pressure regulator and swapped ecu. All electrics are fine, so about to build back up and try again
Sorry to hear about your issue but I'm not sure how the hose connectors and the swirl pot could cause the issue?
As Jason says, if plumbed up correctly this is a proven design without any issues in use with multiple builders.
Did the problem just suddenly start or have you always had the problem?
I would start with some simple things like changing to a new set of spark plugs.
I know that sounds obvious but sometimes we all overlook the simple things!!
Did I forget to mention I had changed the plugs, coil packs and AFM.......
Oh dear
OK, how about the fuel filter.
Mine clogged up after the first few hundred miles and resulted in fuel starvation.
(It was very fine alloy particles from the fuel tank despite washing it out before I fitted it.)
Chris Cunliffe sent me an email after seeing I had started my engine to warn me to change the fuel filter. He says he has had to change his 3 times in 20,000 miles, for the same reasons as Peter.
Jeremy, could your engine be sucking in air between head and throttle body?
What have you done with the carbon canister in take - one of the three pipes entering the throttle body from the underside?)
Mike
peterux wrote:
Oh dear
OK, how about the fuel filter.
Mine clogged up after the first few hundred miles and resulted in fuel starvation.
(It was very fine alloy particles from the fuel tank despite washing it out before I fitted it.)
Yes, when I first got it fired up ,it seemed very throaty and responsive, about a year and half ago,although no exhaust system of oxygen sensor where on then.With regard to air leak, I have removed the inlet manifold, and just replaced all the gaskets from pelican parts..I did find one of the nuts holding the manifold into the block was very loose, with poor thread.Am about to put all back together again.Diagnostics has on most occasions pointed to tps, but this has tested fine with a meter, and has been swapped. The carbon canister is gone, and have blanked it's port on the throttle body...mike you have the m50 also....I have on this rebuid taken out the cooling pipes to the throttle body, as they are not needed.
