GolfGTIforum.co.uk
Model specific boards => Golf mk3 => Topic started by: match on 07 August 2009, 18:47
-
Hello when my mk3 is on idle it sits at 1000 rpm and drops to 800rpm then 1400-1500rpm then 800rpm and it does this all the time non stop any ideas? :laugh:
-
Telling us what engine/car you have would be a good start! :smiley:
-
Its a 1.4 sonn to be a vr6 :grin:
-
do a search for idle problems and read everything.. there is quite a lot it might be.
-
Has the 1.4 not got a carb? If so there will be an idle jet that will probably be blocked.
-
isv perhaps......what year is it?
-
its a 1.4 1995 ive done the sparks,leads,dizzie cap and rotor arm
-
Has the 1.4 not got a carb? If so there will be an idle jet that will probably be blocked.
Spi, like a carb but electronic :smiley:
-
Is that single point injection as opposed to multi on a gti, how does that work then?
-
Is that single point injection as opposed to multi on a gti, how does that work then?
yes..
well its like a carb, but it has one injector that feeds all 4 cylinders unlike gti's that have one injector per cylinder.
-
it is single point i ran an injector cleaner through it (redex)
-
Is that single point injection as opposed to multi on a gti, how does that work then?
yes..
well its like a carb, but it has one injector that feeds all 4 cylinders unlike gti's that have one injector per cylinder.
Correct.
However everything is controlled by an ecu, that's where it differs from a carb.
-
A couple of suggestions.
Check for any vacuum leaks around the injector unit.
Also there is a throttle potentiometer with a built in idle switch on the injector unit.
-
thanks will have a look for splits and whats this switch?
-
Next to the where the throttle cable mounts is a 4 pin connector.
Disconnect it, put a multimeter set to resistance on the bottom 2 pins.
With the throttle slightly open it measure not more than 200 ohms.
With the throttle shut it should measure infinity.
-
and if not?
-
Next to the where the throttle cable mounts is a 4 pin connector.
Disconnect it, put a multimeter set to resistance on the bottom 2 pins.
With the throttle slightly open it measure not more than 200 ohms.
With the throttle shut it should measure infinity.
I dont suppose you have a diagram?
-
A feeler gauge is used to test the switch in this diagram.
(http://i59.photobucket.com/albums/g306/golfvr/throttleswitch.jpg)
-
how about this mate
idle stabelizer valve on the front of spi unit
do you know anything about this?
-
if it has an isv, i would try cleaning it out and seeing if that makes a difference
-
I don't think the ABD engine has an ISV, at least i can find one listed....
-
what will this show me if it doesnt read infinity?
-
It will show that the idle switch is not working properly, so the ecu will not know when the car should be in idle mode..
-
so just a simple switch switch then?
-
Yes, pretty much. I think it also has the throttle position built in.
It may not be your fault at all, but its worth a look.
-
il give it a go in the morning any other ideas in case all fails?
-
Get it on vag com?
-
best bet really cheers mate the vag is cheap where can i get the software?and what do i need to run it?
-
all sorted mate split hose purs away nicely
cheers for the help :smiley:
-
Nice one.
Which hose was split?
-
from induction to carb
really small could just hear the hiss
-
Like i thought then. Most of these problems are usually down to vacuum leaks.
-
The hose didnt look up to much so i got a new one just had to trim it up.
Just a quick one can i put an induction kit on my golf or is it not worth the hassle?
-
I probably wouldn't bother on a 1.4.
If you set it up right, as in the cone filter at the front of the car, you will get slightly improved throttle response, but thats all.
-
do you know where i can find one for my 1.4
cheers mate
-
Try ebay.
-
cant find one for a 1.4.
-
Just found one KnN but think im gonna make my own out of stainless u's and a cone
it will look beter.