Author Topic: Fuel Starvation?  (Read 928 times)

Offline EvilScotsman

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Fuel Starvation?
« on: 18 February 2007, 09:44 »
Hi all,

I had the usual gti cutting out problems etc (yawn) and fix them yesterday by cleaning the TB to pristine condition lol

The engine now idles sweetly, and starts quite easily altho still needs a wee bit of throttle to catch at start up HOWEVER the engine now seems to have developed a fuelling fault - if i accelerate say - up hill, opening the throttle further causes the power to drop away, but letting back on the throttle and the engine wakes up and pulls strongly!

Its like too much air / low fuel pressure etc,

I did at one point renew the wee hose to the FPR although I might not have sat the FPR in exactly the same position (as it seems to rotate easily if twisted by hand now) - so maybe it isnt fitted correctly now? I saw in the haynes that the return port must point down but the new hose is a tiny bit short so pulls the FPR round a bit - could this be the fault?

It revs fine now when sitting still but under load the throttle has to be used gently or opening up too much makes the power sag away :O(
"Handheld OBDII Scanner"

Offline robster23

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Re: Fuel Starvation?
« Reply #1 on: 18 February 2007, 12:41 »
Could that be something with the air fuel mix as set by the ecu? Now it's getting air more easily, it doesn't know what to do with it? Maybe try resetting the ecu and see if it sort itself out?

odd problem!
It's urban right? That means it must be tougher, obviously.... ;-)

Offline EvilScotsman

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Re: Fuel Starvation?
« Reply #2 on: 18 February 2007, 14:27 »
I seemed to have cured all the problems wi one swoop!

I spent an hour just now - removed all spark plugs and lined no1 cylinder on TDC, checked the dizzy and it was well out. I rotated the body till the mark was aligned wi the centre of the rotor, cleaned the plugs and put it all back - now its running like a sweetie. Smooth, quick and strong. I know you cant adjust the timing because of the ecu but the base setting was indeed wrong so now its right the ecu seems very happy. (btw my long term mfa consumption had fallen to 20mpg!

It had done this since i got the car a month ago but the TB sooting up was probably the last straw for it. On an 8 mile trip to the local tip and back it recorded 25mpg from cold so looks like its mended.

Yee haa!
"Handheld OBDII Scanner"