Flappy Question - sorry
09-04-2004 | 12:49 PM
#1
Thread Starter
Track Day
Joined: Oct 2003
Posts: 23
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From: Sterling Heights, Michigan
Flappy Question - sorry
Sorry about asking a flappy question, but I couldnt find anything on this when searching and I am looking at a car to buy.
The owner says that his mechanic has wire tied the flappy open. I havent checked yet to see if it moves on start-up, but I am just generally wondering if this is an OK thing to do. As I currently own an '82, I usually dont follow these discussions too carefully, but wire-tieing it open doesnt sound like it would help things when most of the time I thought remained closed. Seems to run good though.
TIA,
Paul B
The owner says that his mechanic has wire tied the flappy open. I havent checked yet to see if it moves on start-up, but I am just generally wondering if this is an OK thing to do. As I currently own an '82, I usually dont follow these discussions too carefully, but wire-tieing it open doesnt sound like it would help things when most of the time I thought remained closed. Seems to run good though.
TIA,
Paul B
09-04-2004 | 01:55 PM
#2
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Joined: Jul 2002
Posts: 2,673
Likes: 35
From: AZ
Go to heinrich's thread titled
S4 - 85 Hybrid Engine ... Thoughts?
It is a few pages back. There you'll see a chart that I posted that shows factory power charts of with and without the resonance valve (flappy). You'll see that for normal driving you DO NOT want the flappy to be tied open, it should be left in the closed position.
If you buy the car, you should plan on removing the intake manfold and fixing the flapply (probably replace the actuator) and also clean/replace the idle speed regulator and all the vacuum lines. While you're down in there check out the spark knock detectors. Often they get damaged by oil and gas and need replacement. So, I'd lower the bid price to compensate you for the extra work that needs to be done. After that, your shark could be good for the road!
I'd suggest a full pre-purchase inspection to see if other bad practices were preformed. Why anyone would tie the flappy open is beyond me.
S4 - 85 Hybrid Engine ... Thoughts?
It is a few pages back. There you'll see a chart that I posted that shows factory power charts of with and without the resonance valve (flappy). You'll see that for normal driving you DO NOT want the flappy to be tied open, it should be left in the closed position.
If you buy the car, you should plan on removing the intake manfold and fixing the flapply (probably replace the actuator) and also clean/replace the idle speed regulator and all the vacuum lines. While you're down in there check out the spark knock detectors. Often they get damaged by oil and gas and need replacement. So, I'd lower the bid price to compensate you for the extra work that needs to be done. After that, your shark could be good for the road!
I'd suggest a full pre-purchase inspection to see if other bad practices were preformed. Why anyone would tie the flappy open is beyond me.
09-04-2004 | 02:41 PM
#5
Drifting
Joined: Nov 2003
Posts: 2,733
Likes: 92
From: London, UK
I became rather distracted by the operation of the flappy when I should have been concentrating on the condition of the cam belt. It's really not a huge issue - if the actuator has failed a weekend is all it takes to sort the problem, and there's lots of help online to guide you. As Rich says it's a good time to replace dodgy looking knock sensors, you'll get a much better understanding of what does what if you choose to do the work yourself, and you don't need any special tools (but you do need lots of gaskets/seals).