924Board.org

bseghat · Joined: 30 Apr 2009 Posts: 30 Location: Connecticut

i have a problem which might be similar to http://www.924board.org/viewtopic.php?t=29000 but i am not sure.

i just bought this car and i think there is something missing but i cant find out what. i will post pictures of the engine soon.
the car starts, idle a title bit low, but if a press on the gas pedal nothing happens, i also opened the throttle manually but the car just stays on idle.

bseghat · Joined: 30 Apr 2009 Posts: 30 Location: Connecticut

this car hasn't seen the road in 20 years

when the car was on i noticed this part. Is it missing a hose or that's the way it should be?
removed the part so i could take a clear pic of it.
Check picture,
http://img147.imageshack.us/img147/8272/imgp247233.jpg
http://img167.imageshack.us/img167/2150/imgp2473r.jpg

Smoothie · Posted: Tue May 05, 2009 6:36 am Post subject:

Can't guess what part you removed to get the clear pic, but -
Pic 1 looks like an air pump for emissions. You'll have to hear fromm someone that's more familiar with them - as to whether that port gets an air filter attached, or if it gets a hose connection back to another part of the engine...
May be able to eliminate this part depending on emissions laws in your area.
Pic 2 is showing the throttle body with no intake "plumbing" to it (it should have some rubber/plastic "boots" attached that route air from the airbox-fuel distributor to the throttle body.

If it hasn't run in 20 years, count on it needing a thourogh fuel system disassembly and cleaning due to old fuel varnishing up and/or rusting both moving parts and small orifices. -But suprised it runs at all if it really hasn't run in 20 years..
_________________
"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

968rz · Joined: 21 Aug 2006 Posts: 537 Location: S. E. Wisconsin

+1 on Smoothie's comments.
With out the air boots from the throttle body to the fuel dizzy it may start but will never rev up .
_________________
Rick
79 924 coupe Petrol Blue 3spd auto (wife's DD)
93 968 coupe Amazon Green 4spd Tip (my DD)

bseghat · Joined: 30 Apr 2009 Posts: 30 Location: Connecticut

Smoothie · Posted: Tue May 05, 2009 1:50 pm Post subject:

Ya. It is definitely an air pump, and it's for emissions, but I never had a car with one, so don't know much about them. My understanding is that they pump air into the center of a dual bed catalyst catalytic converter (look for an attachment to the cat). Pretty sure now that the open port in pic 1 is for a small air filter. You'll need to hear from some else for the rest including what that fat line to the intake accomplishes.
Most parts diagrams can be looked-up on pelicanparts.com - from that you can usually see what other parts are associated.

-But like I said, if you don't need it to pass emissions testing in your state, consider removing it. Many that don't need it, do this. The air pump + dual bed catalyst wasn't/isn't the greatest emissions device (inefficient fuel-wise and usually produces high NOx), even if the catalytic converter is in like-new condition, which would be unlikely.
_________________
"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

968rz · Joined: 21 Aug 2006 Posts: 537 Location: S. E. Wisconsin

The fat line is going to on way pressure valve that stops exhaust from backing up into the air pump. The valve should be connected to a hard metal tube that connects to the exhaust at some point. All this thing does is inject air into the exhaust to dilute it. They often freeze up internally and as Smoothies said, if you don't need it for state emissions get rid of it. They steal some HP from you and most inspectors wouldn't know it was missing anyway.
_________________
Rick
79 924 coupe Petrol Blue 3spd auto (wife's DD)
93 968 coupe Amazon Green 4spd Tip (my DD)