performance loss
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2nd Gear
Joined: Jun 2002
Posts: 2
Likes: 0
From: France
performance loss
Hi!
I have a problem with my bleoved 928 S4 ( I love the car, but of course less than my wife and daughter, to put things in perspective. BUT...)
I have not driven it much lately, about 2000 miles /year ( the car is a 87 S4 with 75000 miles)
and I noticed a severe loss of performance; I find it very hard to push it above 4000 RPM and reach speeds above 100, 110 MPH...
The engine does not stutter, I have had every possible filter changed,dito the spark plugs, added quarts of Techron, to no avail: I am getting passed by older Renault cars and delivery trucks ( in France where I took my toy from Miami Beach... Speak of a change).
Has anyone an idea of what can be wrong? I understand that it could be the coils, the exhaust system...
Thanks!
I have a problem with my bleoved 928 S4 ( I love the car, but of course less than my wife and daughter, to put things in perspective. BUT...)
I have not driven it much lately, about 2000 miles /year ( the car is a 87 S4 with 75000 miles)
and I noticed a severe loss of performance; I find it very hard to push it above 4000 RPM and reach speeds above 100, 110 MPH...
The engine does not stutter, I have had every possible filter changed,dito the spark plugs, added quarts of Techron, to no avail: I am getting passed by older Renault cars and delivery trucks ( in France where I took my toy from Miami Beach... Speak of a change).
Has anyone an idea of what can be wrong? I understand that it could be the coils, the exhaust system...
Thanks!
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Joined: Jun 2000
Posts: 40,491
Likes: 140
From: Insane Diego, California
Bienvenue, mon frère de 928!
Could be a number of things, including a clogged catalytic converter, major vacuum leak(s), bad coil(s) and/or an inoperative 'flappy' control unit.
I'm sure as this thread evolves others here will be able to narrow down your root cause.
Could be a number of things, including a clogged catalytic converter, major vacuum leak(s), bad coil(s) and/or an inoperative 'flappy' control unit.
I'm sure as this thread evolves others here will be able to narrow down your root cause.
Intermediate
Joined: Sep 2001
Posts: 27
Likes: 0
From: Lausanne (Switzerland)
I had a similar problem today. After reconnecting the battery this morning i forgot to follow the procedure that let the injection brain recover his settings. The manual says that you have to start the engine and let it idle 10 minutes. I had the symptoms you described (total loss of power). So i simply disconnected and reconnected the battery again and followed the procedure. The car runs perfectly now.
Bonne route
Bonne route
