poorly car, ISV advice anyone pleeeeease ? !

laura80 · 19-02-09, 09:09 PM

hi i was wondering if anyone can give me some advice on this isv please, after being laid up for about 4 months, my 86 gt coupe has decided not to run properly, she was fine when i left her (apart from i smashed up one of the original rear alloys, hit a rock doing 60 OUCH) so she could just be peed off with me!!
symptoms are :-
starts fine from cold, ticks over perfectly at just over 1000, almost immediately it will start to slow and then die. wont start again for about 5 mins.
also if i give her any throttle straight away she dies even sooner.

i have tried many things, including;
new leads plugs vac hoses dizzy cap rotor arm, checked for air leaks. etc,
new air filter , i cleaned the isv, but the spring inside seems a bit slack,
should the valve be well sprung inside?
also i think i scratched the inside of it with a screw driver.

stoopid i know.
could it be the injectors even though it seems to start and run perfectly for a couple minutes? does my car have an ECU could that be the prob?
anyways thanks in anticipation sorry for the essay!

mikes2 · 19-02-09, 11:42 PM

Is this a KV engine ?

It may be old petrol in the system causing a problem. I would recommend filling the tank with fresh fuel

laura80 · 20-02-09, 08:46 AM

yeah it is the kv,
i never thought of filling it up, i just put a jerry can full in .
ill give that a try and run some redex through with it

laura80 · 22-02-09, 10:08 PM

have tried a load of fuel and redex, checked the timing yesterday as well, thats fine, its really predictable what it does, it starts absolutely on the button , revs a perfect 1100-1200, stays like that for a minute or two then starts hunting up and down , lower and lower until on the fourth decline it just cant pick up anymore. just fizzles out . wierd

ive got an isv coming now so im gona keep my fingers crossed that it will sort it

19-02-09, 11:42 PM	#2
mikes2 4 ring whore! Classic Audi Club Member Join Date: Nov 2007 Location: Polmont Posts: 2,617	Is this a KV engine ? It may be old petrol in the system causing a problem. I would recommend filling the tank with fresh fuel __________________ 1991 90 quattro 20v sport 1991 90 quattro

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20-02-09, 08:46 AM	#3
laura80 Grown up member Join Date: Feb 2009 Posts: 71	yeah it is the kv, i never thought of filling it up, i just put a jerry can full in . ill give that a try and run some redex through with it

22-02-09, 10:08 PM	#4
laura80 Grown up member Join Date: Feb 2009 Posts: 71	have tried a load of fuel and redex, checked the timing yesterday as well, thats fine, its really predictable what it does, it starts absolutely on the button , revs a perfect 1100-1200, stays like that for a minute or two then starts hunting up and down , lower and lower until on the fourth decline it just cant pick up anymore. just fizzles out . wierd ive got an isv coming now so im gona keep my fingers crossed that it will sort it