GTI cutting out, oil light flashes

[kicklikeamule]

Update since my last post. Fitting the ECU relay (I didn't have one before!) has made no difference. I have also changed the Fuel Pump relay, but again no difference.
Oh well, at least that's two potential cures off my list. Might try and sell the impulse sender that was changed previously and fuel pump relay to recover some of the cost. They'll be appearing on a well-known online auction site near you very soon. Hopefully, they'll find a good home and cure someone else's faltering VW.

[starfishcracker]

The diagnostic port is behindthe small pannel to the left of the ashtray.

You have to remove the ashtray and then the pannel slides out to the right!

easy when you know how - very well hidden though!!!!

...where is the diagnostic port on a 1997 P Reg 8v? The Haynes manual doesn't even cover the engine management system!

[PhilGTi]

Thanks 

Phil

[hempy72]

Can anyone help I have a VW Golf 2.0 8v MK3 Anniversary edition I'm having the exact issues I've changed the ECU relay, Air flow meter and still it cuts out at every junction. Oil light and battery light as soon as the car comes to a stand still. Its been to the garage and they reckon it needs the hall sender changing ( expensive) any ideas? Cheers

[Supermac]

Had the same problems on a MK3 P reg 8v, used this forum to sort it out. Changed the rotor arm, and the ECU relay to no avail. My mate's dad runs a garage, he cleaned the throttle body out (for ?50) and it hasn't cut out since. One garage I spoke to before this tried to get me to pay the diagnostic charge and wanted to replace the throttle body itself, which they said could cost up to ?600.

From what I can see, the best option is to get the throttle body cleaned if the rotor arm and the relay don't work, the arm wasn't that expensive and I got the relay for 8 quid. At least the body-clean is cheaper than some of the options, and seems to be the #1 solution. Thank God for this forum, I was going wappy with the damn thing cutting out all the time.

[Overseer]

cleaning the thottle body is really really easy.. you just need a squirty thing of carb cleaner (something like wynn's..) cost me about 6 quid i think..

u just loosen the circlip by the body and clean it all up... 50 quid? ouch!

[PhilGTi]

Just a quick update on my problem. I have datalogged the Speed Sensor as I though this may be the issue (after reading posts here). Nothing wrong with it and to be honest a magnet either works or it doesn't. I logged the power to the sensor to see if that was dropping out. Nope. I them measured the resistance of the Ground wire back to Chassis Ground. It was a whopping 4.5ohms, it should be 0.5ohms. I'm now looking for a Ground fault, which would make snse as the car plays up after it heats up (wires get too hot and the Ground trips out).

Just a note about the throttle body. A dirty TB would only make the car cut out when it's idling, not normal running.

Phil

[PhilGTi]

A quick fix for idling/stalling problems when coming to a stop. I had this last year and this worked a treat (although I didn't actually find the fault).

If the throttle plate closes completely, to idle the system relies on a idle valve to leak enough air past the throttle to keep it running. Clearly there is a problem somewhere and I took off the TB to inspect it. I couldn't see a passage way for air to go around a closed throttle and put the TB back. I didn't want to clean the TB as this has caused high idling problems as you can remove too much carbon and risk not having the throttle seal.

Not knowing the exact problem and course of action to take, I knew the car needed air to keep running, which in some cases it wasn't getting. My solution was to tighten the throttle cable at the support just before the TB, so when the cable was at rest the throttle plate was slightly open. this had the desired effect of no more stalling and it idled under 1000rpm. A few months later I went back and slacked the cable and it been fine ever since. May be the ECU has 'learned' the new position?

Phil

[gti monkey]

hello!
im fairly new to the forum, having only purchased my shiny green sexed up gti 3weeks ago
but since that day it has had this exact same problem which was bugging the crap out of me.
i decided to start at the easiest place and work my way up! so i removed the pipe from the airbox to the
throttle unit. i noticed a tiny bit of gunk around the intake and with some carburater cleaner removed it.
decided to put it back together and take it for a spin just to be sure this wasn't the problem and incredably i couldn't
get her to stall its been a week and its as smooth as silk.
i suggest everyone try this as it takes less than 5 mins and requires as much kill as your average cabbage can muster!

 anyway hope that helps someone

[redcarboy]

IF you are running an AGG engine have a look at page 76 of the march issue of golf + theres a good paragraph on the old oil lamp cutting out engine problem..