Power loss at 4000

[Marc Dugas]

I can not figure out why when my 1987 european Audi, 2.3 I5, NF KE-jettronic 
III, 136HP, 75000miles, Looses all power at about 4000 rpm. I have canged 
the fuel pump, fuel filter, air filter, cap and, roter. I run 0w40 synthetic 
oil.

It has more problems when it gets warm. When you first start it, it has 
great power all the way to about 4500 and dies at 5000, just will not 
accelrate anymore, no matter what gear.

I noticed the problem about a month ago I couldnt get above 5500 rpm. But 
now Im limited to 4000. That is why I have all the new parts. I thought 
putting all that new stuff on would help, but the problem never changed.

When it gets warm you can not get it above 4100 and it has no power starting 
at 3500. Its not unstable at its max rpm, you just keep your foot on the gas 
it will just stay there, untill you go up a hill or something(no power cant 
climb hill).

When you shift gears and drop the rpm's lower again it still stumbles a bit, 
not misfireing, just like if you took your foot off the gas a bit. Then it 
seems to regian itself and accelerates to 4000 and just sits there.

When the engine is hot, like when you take a long highway trip, it just 
dosent have much power at all. Makes the normal engine full gas engine 
roaring noise just no power. When you keep it at 4000 for a period of time 
and take my foot off the gas, sometimes I hear a bit of a ticking sound. The 
engine also seems to run a bit hot, the fan comes on alot, and when I turn 
the car off (i have a new thermastat also) the fan usually stays running.

It also has a very low, bit rough, but stable, idel at about 600 rpm.

I suspect the hydraulic lifters are bad, but would this cause the rpm 
problem. I think they could cause this problem. Just looking for some advice 
before I start spending the beer money, (living in Austria) beer is good 
here.

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