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Discussion Starter · #1 ·
Hi Guys,
My Golf is having some weird, weird issues. It runs alright when choke is on, but as soon as it comes off of choke it becomes impossible to drive. accelerate the the revs bounch (about twice a second) between 1 and 1 1/2 thousand rpm. But if you switch off the engine and go again, then as long as the choke is on she runs fine.
I was having some general running problems, but nothing this bad. I changed the lambda sensor on Friday and that helped a lot. These new problems came on suddenly after two hours of motorway driving.
We discovered that the cat was glowing red hot and appeared to have collapsed internally, so I've just replaced this but I fear that the new lambda probe has been fried. Would that explain the issues?
On top of the lambda probe I've also recently changed plugs, dist cap, rotor, leads, air filter, mass air sensor, cat converter and exhaust.
I just don't get why it would run fine on choke but barely function at all as soon as it comes off of choke!
Any ideas guys? My garage are stumped and I'm skint until payday so can't afford to go to a specialist just yet.
 

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Re: (2.Vent0)

I think his was carbureted
 

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Re: (VR6225)

A lambda probe is an o2 sensor; one in the same. You gotta remember k2col is from the UK and has some seemingly different ways of refering to things (garage = shop, skint = low on money). But lambda probe an absolutly correct term and I have even seen it comonly used in the US quite a bit. I think vag-com uses the term as well as many automotive books.
I don't think k2col's car quite has a choke but we get the point!!
 

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Discussion Starter · #9 ·
Re: (lazyace)

thanks for the responses guys and thanks to lazyace for translating my english dialect
Having lived in Colorado for a year you'd think I'd know better than using words like skint!
my current thinking on the car is that the lambda probe has been destroyed by the cat overheating so i'm gonna replace it and see how she goes. I just hope that the new cat doesn't overheat and ruin the next one. I'm also wondering if I should open up the engine and clean/inspect the injector(s?) but this is going waaay past my comfort level in terms of home mechanics.
Ignition timing I understand is automatic on the Mk3 GTI, its based on inputs from the lambda (o2) sensor, mass air sensor (MAF), air intake thermostat, throttle position sensor and road speed sensor. A fault with any one of these would case bad running/misfire and may be the cause of my problems so thats where i'm currenty focusing.
Its getting annoying though! I have already thrown a lot of money at the car and don't feel like I'm getting anywhere....

Cheers,
Colin
 

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Re: (k2col)

Hey, I like the dialect myself!
Quote, originally posted by k2col »
my current thinking on the car is that the lambda probe has been destroyed by the cat overheating so i'm gonna replace it and see how she goes.

http://****************.com/smile/emthup.gif
I think the new lambda sensor will help out a lot. When you get it back and running again I would probably let it idle for a while and periodically check the temperatures at the entrance and exit of the cat. The temps should be within ~10+ degrees of each other but not to exceed ~35, if I recall. If it is higher you still have a fuel mixture problem.
 
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