Ive checked the plugs after it just idling and No 2 plug is always SOAKED with fuel


i have swapped injectors around to see if its a leaky injector

nope

still the same plug being flooded



what could have an effect on the injector to overfuel other than the ECU????

cheers guys, all help is greatly appreciated.. slowly getting there

 

Try it without the vac pipe to fuel reg connected. Its probably split the diaghragm and is squirting fuel straight down the pipe into no2.

 

thanks stu ill go try that now

if not, what else do you think could cause it?

 

dead plug of course

 

No spark to no 2 plug? Dizzy ??

 

tried new plugs, dizzy cap and rotor arm


Stu, my fuel pressures are

idle 41 psi
on boost in 2nd drops to 37 psi
on boost in 4th stays at 40-45 psi


dead pressure reg?

 

Dave have you tried a new ht lead on number 2?

 

i havent mate, that bang on my list when i return to the garage tomorrow

thing is, it drives off boost fine

it only splutters when its reved whilst idling

and missfires under full load

fuel pressure is still low isnt it, a 1.7 bar esc cos shouldnt run 37 - 45 psi on boost

should it ?

 

Have you also checked for a leak on the inlet manifold?

I would deffo change that plug lead as it could be causing the wet plug/missfire!

 

Regarding the fuel pressure i am no expert but my car was indicating 55psi at idle and 60 at 3k rpm!

 

ill deffo change the lead, see if it makes a diff.

time to change the pressure reg i think too


Stu , if the rail was welded whilst the pressure reg was still in situ.. this could well faff it up yes? thinh is, i cant see Martin overlooking that

 

Its a possibility but like you say, i dont see Martin overlooking that as its a simple circlip to remove it and hes nobodys fool

If it has failed then it may be for no other reason than its 12yrs old.

Fuel pressure should be at 3.5bar +-0.2bar with the car idling and the vac pipe REMOVED.

BWith the vac pipe refitted it should drop approx 0.5bar although that figure isnt important. What is of VITAL importance is that the fuel presure rises with a 1:1 ratio for boost.

So:
ZERO on boost gauge = 3.5bar

0.5bar boost = 4.0bar
1.0bar boost = 4.5bar

ETC ETC ETC.....

Please take note Dave, if this is wrong the engine WILL melt.

Reasons for lack of fuel pressure.
Split / leaking FPR signal hose / dying reg / crushed fuel line / dying pump / dying wiring.

Thats it top of my head at 8:30am.. brew time

 

thanks stu, much appreciated

i found this by geert in the technical forums

https://passionford.com/forum/viewtopic.php?t=57488

sounds like my exact prob so ill change the press reg. I did text martin and he said the reg wasnt taken out as the welding wasnt close to the reg itself so wouldnt suffer heatsoak.. looks like its deffo dead though

now lastly.. any reccomendations on a replacement fuel reg? std? or geert reckons he has a higher pressure one from an audi

 

If your sender isnt next to the reg then as he says, it wont suffer much heat, they are obviosly designed to take some decent heat given they are bolted to a YB

Std is generally fine actually but there are aftermarket ones to run slightly higher, bear in mind that more fuel pressure = more fuel everywhere, so your map will be rich and ideally need remapping.

 

you beauty, lets hoep this sorts it

cheers again

 

Let us know what the problem now was m8.