87 5kTQ stalling

[Ameer Antar]

This is a vac. leak. I've [as well as prolly every type 44 owner] had the 
same problem. Mine would stall some times, then do fine for a while, then 
only to die at a stop sign. It was just a really worn intake hose on the 
front of the turbo. The hose cracked under the hose clamp itself, so it 
looked fine, but the actually slipped on and off the turbo, causing the 
stalling. The only way to look for leaks is to actually remove the entire 
intake path after the air-flow meter. The problem is the cracks are usually 
where you can't see them. Look at the boot on top of the air flow meter, 
the hoses on the turbo, and michelin man. Also check the metal pipe for 
cracks as well as intercooler and any leaking around the intake manifold. 
Check other smaller hoses as well. The problem shouldn't be too hard to 
find. In most cases, it becomes apparent after taking off a couple hoses. 
good luck.

-ameer


At 05:58 PM 11/24/2000 , you wrote:
>Our 87 5kTQ has been stalling and exhibiting other strange behavior. It
>started about a month ago when it did not want to idle in the morning until
>it was warmed up, which later progressed to it didn't want to idle when warm
>and the alternator was putting out, ie; with the headlights and rear window
>defogger working. I put in a bottle of Techron, doesn't that fix everything?
>No, apparently not. I had driven a few miles to drop off my wife to ride her
>horse and was to pick her up in 45 minutes. After sitting for the 45 minutes
>I drove to get her and the car stalled at a stop light. It would fire and
>then die when I started to pull away. It did this for a couple of minutes and
>then fired up. I drove home switched cars and went and got my wife. She
>didn't drive the car for a few days and I could find nothing wrong and could
>not reproduce any of the problems. So a day or two later I was going to take
>the car to an Alfa Romeo meeting about an hour away, I guess I really pissed
>off the Audi gods since I got two miles from home and the car stalled on the
>ramp to the tollway. It would catch but would not keep running a couple of
>times and then no catch at all, no codes then or previous or now. I had to
>tow it home. I was busy all week so today I took it out and almost everything
>was fine except for when I punched it the boost would climb to 1.2-1.3 bar
>and then around 4500 rpm would start to decrease to 0.9-0.8 bar. This makes
>me suspect the Michelin Man hose or some other intake air leak, but I
>replaced the Michelin Man hose around a year ago. I also replaced the right
>front mount, exhaust manifold and intake manifold and the Michelin Man hose
>looked fine. Any other ideas?
>
>Thanks in advance,
>
>John Katos
>West Dundee, IL