Under fuelling possible over 3000rpm?
Turbo Mini Forums

Okay something I've just found. From the plenum to the pressure regulator should there be fuel in there? Daft question it's gonna sound I know as my thoughts were it's just for sensing purposes??

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Try blocking the part throttle lean off pipe. It goes from the side of the carb up to the top near the flange on the manifold side.

Block both ends securely.

In the 13's at last!.. Just

The loop from the top by the inlet manifold to the one on the side by the fuel in on the carb?

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By the way it's not coming through it at great pressure just dribbling through it. And if it is that link pipe. No good it's still doing it

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May be nothing to do with this but I have had an EDIS that refused to work properly over 3000rpm.

Well seems to me is a fuel issue as it will go all day flat out however now it's like when you come off the throttle it's still fuelling? Which is why I rebuilt the carb as I thought it might be the needle seat not shutting off. No good though as the problem is still here. And now I've noticed as I said above there is a constant dribble from the regulator into the plenum. Hence why that keeps filling up with fuel?

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Right some good news!!! Fitted new fuel pressue regulator and yay the over fuelling into the plenum has gone. Drives a treat now just needs fine tuning so I know it's okay on boost. Although I can't get 3-4 psi to show at the regulator. I have a gauge and I'm right in thinking you put it between the carb and the regulator. Is that right? Also where is the best place to fit the lambda for an afr?

Cheers people

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yess to check fuel pressure you place the gauge after the reg ie remove the line feeding the carb and stick the gauge in there turn the pump on should be 3-4psi as you already know

if you are asking how far from the cylinder head do i weld the O2 sensor for AFR gauge then that depends on the brand i think for my AEM its something like 16" ? correct me if im wrong guys

BUT! you cannot place it before the trubo as it wont read correctly they dont like pressure so it must go in the dump pipe most guys have them just after the elbow

there is a way to read before the turbo but its more work and it only reads #1 #2+3 #4 depending on how many O2 you have and how complicated you want it