new audi 4000 owner having struggles...
09-13-2007, 10:51 PM
#11
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thanks guys! if he is wanting to part it out, i need...
a turbo!
see if he has a k26 or k24... i really could use either.
poss. a new airbox (the plastic piece that the igloo TIP thing and also all the fuel lines go to...)im quite sure mine has a crack in it.
and of course... anything aftermarket im interested in.
let me know
360-305-0436
see if he has a k26 or k24... i really could use either.
poss. a new airbox (the plastic piece that the igloo TIP thing and also all the fuel lines go to...)im quite sure mine has a crack in it.
and of course... anything aftermarket im interested in.
let me know
360-305-0436
09-13-2007, 10:57 PM
#12
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It is very rarely the cold start injector. In fact, never found one to be the problem...
www.humanspeakers.com/audi
is an awesome technical reference for the 4k's and coupes.
Scott Mockery's site, whos URL escapes me, is awesome for the turbo engines.
-Dave
is an awesome technical reference for the 4k's and coupes.
Scott Mockery's site, whos URL escapes me, is awesome for the turbo engines.
-Dave
09-15-2007, 07:47 AM
#14
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Did you bother to look at the link? If you had, you would find the following:
"Cold Start Valve
This is an often maligned, very rarely bad part of your fuel system. It is always the first suspect in poor cold starting situations, due mostly to its name. What does it actually do? For a few seconds when you first turn the key (depending on how cold it is under the hood), fuel is sprayed through this "sixth" injector (well, we call it that in the five cylinder engine) into the intake manifold. This makes the mixture nice and rich for a moment, which helps get those first few sparks to make explosions.
There are fairly simple test procedures outlined for them in the Bentley shop manuals, which I am not going to duplicate here. if your car is not starting well in the cold, 99% of the time it won't be the CSV itself. Once in a while the sytem that triggers it will fail to operate properly, but the problem will usually be elsewhere even in that case.
The CSV does so little... it is an electrical injector that has constant power (12v). When the engine is cold it is grounded while cranking through the thermo time switch, and of course sprays a little extra fuel. On some cars, it is also grounded intermittently while cranking by the hot start pulse relay, adding a bit of extra fuel during warm starts.
It can be triggered manually also.
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"
I've never, ever, ever, had a bad Cold Start Injector. Plenty of hard starting conditions, but never a CSV/CSI.
Thanks to it's name, everyone always thinks it should be the problem.
-Dave
This is an often maligned, very rarely bad part of your fuel system. It is always the first suspect in poor cold starting situations, due mostly to its name. What does it actually do? For a few seconds when you first turn the key (depending on how cold it is under the hood), fuel is sprayed through this "sixth" injector (well, we call it that in the five cylinder engine) into the intake manifold. This makes the mixture nice and rich for a moment, which helps get those first few sparks to make explosions.
There are fairly simple test procedures outlined for them in the Bentley shop manuals, which I am not going to duplicate here. if your car is not starting well in the cold, 99% of the time it won't be the CSV itself. Once in a while the sytem that triggers it will fail to operate properly, but the problem will usually be elsewhere even in that case.
The CSV does so little... it is an electrical injector that has constant power (12v). When the engine is cold it is grounded while cranking through the thermo time switch, and of course sprays a little extra fuel. On some cars, it is also grounded intermittently while cranking by the hot start pulse relay, adding a bit of extra fuel during warm starts.
It can be triggered manually also.
return to top or list
"
I've never, ever, ever, had a bad Cold Start Injector. Plenty of hard starting conditions, but never a CSV/CSI.
Thanks to it's name, everyone always thinks it should be the problem.
-Dave
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