Fueling, any Idea's?
Turbo Mini Forums

Went to the RR today for my first set up, but fueling is causing an issue! At idle the car is fine, it'll hold rev's too, but any sort of load an rev's, leans off and dies. The carb was stripped and cleaned, then the jet cleaned out etc and it's still the same.

Fuel pressure is 4psi at idle, so that's fine..

The balance pipe is disconnected, but car won't run with it connected at all! Or with the carb side of the balance pipe blocked off it won't start either. The RR opperator can't work it out, I have ordered new gaskets for the plenum-carb to ensure the airways are clear in that department, anybody have any other idea's??

Balance pipe??

is it turbo with hif44? was the little hole cut out in the gasket between the carb and plenum not all have it

is the fuel pressure going up with the manifold pressure?

is there an air leak?

have you tryed the "T piece trick" (a quick search should find info)

just a few to check :)

also did you drive it there? did it drive ok then?

Yes i moved to the darkside

Instagram @jdm_brett

Yes i moved to the darkside

Instagram @jdm_brett

Had a read search and read about the Tee Piece trick, and I think I might give that a try tomorow, hopefully my new gaskets will turn up tomorow so I can fit them and try again.

By carb balance pipe, I mean the plastc pipe that runs from the pipe just above the fuel in, and to the spacer after the carb. At the minute I have nothing connected on that, meaning I'm loosing all the pressure that the plenum-float bowl airway is providing, surely? It won't run with anything connected onto the float bowl side of this thou....

I towed the car there as I couldn't get it running right (got it idling but nothing more) so he could go from there but I'm stuck now...

I'll have a check on my gasket aswell tomorow, because after second thoughts, if the hole isnt in the gasket, then blocking the pipe will surely just make a vacuum? Causing my trouble with it starting...

Edited by TomBooth on 14th Jan, 2009.

Its strange that it won't start when you block the carb end of the leanoff pipe, or connect the pipe. If not used It should be blocked both ends, thats what you should concentrate on.

If you do not block the carb end or use the pipe there is a leak in the system, I think its tapped to the top of the fuel chamber and if I remember correctly that that would mean that if you came up on boost the fuel would not get pressurised (through the hole in the gasket that often gets blocked by using the wrong type) so even if the gasket is OK it would lean out, i.e exactly what you are seeing.

Maybe your basic idle mixture has been set way off to allow for that leak, and when you block it its so rich the engine will not run?

As said, definitely check that hole in the plenum/carb gasket, it still could be the problem..

Terry

Edited by Turbo Tel on 14th Jan, 2009.

website:- http://www.terryhunt.co.uk

Good advice above. The part throttle lean off pipe is your problem. This needs to be blocked off or connected.

I think that Turbo Tel has hit the nail on the head ... "Maybe your basic idle mixture has been set too rich to allow for that leak, and when you block it its so rich the engine will not run? "

In the 13's at last!.. Just

Preety sure it is fixed! Checked the gasket and the hole was there, but not open enough. so I opened that up and blocked the part lean off pipe, it was better but still died back down after revs, alot better then it was thou.

I Tpieced into the fuel reg-plenum line, and fitted that to the part lean take off an it runs ALOT better! It's actually driveable too which is a massssive leap on what it was. Going to richen it up a little then run it down to the rollers. Thanks for the help thou all! Much apreciated!

Have you checked if your fuel pressure is rising with boost?

Team Racing

This problem plauged me for over a year, car would idle and run ok off boost but once the pressure came up it cut out and died turned out to be the balance pipe. ther was the smallest of holes in it and this is enough to cause all sorts of issues. What annoyed me was it was a new part one of the first bits I changed but it had the same fault. Go figure:(

Edited by Mr Joshua on 16th Jan, 2009.

Own the day

Not yet Jimster, going to fit a FP gauge just to make sure...

Did you get to the bottom of the problem

Own the day

"Tuning should be a compromise between what is possible and what is necessary"

10)Thou shalt always quest for more power

tom fitted turbo daves T piece trick and its sorted now

and he used the plenum gasket with the hole in