|
|
|
|
| Author |
|
|
1974 911 w/ 83 SC engine
Join Date: Aug 2009
Location: Austin, Texas
Posts: 602
|
The old spray carb-cleaner to find the leak trick...
I've been reading the way to find leaks in your CIS is to spray carb cleaner around the system, and if it raises the idle, then something is leaking. Well, I did that, and found when I sprayed at the location pictured and circled here, the idle jumped. Can anyone tell me what I am to make of this? I tightened the clamp thats there and re-sprayed, and after that the idle didn't move. But am I just covering up a bigger issue?
|
||
11-20-2010, 09:07 PM
|
|
|
Registered
Join Date: Aug 2006
Location: SoFLA
Posts: 5,536
|
Isn't that the heater booster fan hose? If so, that has nothing to do with combustion. The intake runner located immediately behind it does, however.
|
||
|
11-20-2010, 09:22 PM
|
|
|
1974 911 w/ 83 SC engine
Join Date: Aug 2009
Location: Austin, Texas
Posts: 602
|
That's what I thought too, it got in the intake port behind it. And I couldn't see how the heater hose had anything to do with the idle, either. I just wanted to post it here and make sure the experts thought the same. This being said, what does it mean that the idle raises when the carb-cleaner gets in the intake runner like that? What do I need to replace/repair exactly?
|
||
|
11-20-2010, 09:26 PM
|
|
|
Checked out
Join Date: Jun 2009
Location: On a beach
Posts: 10,127
|
that hose has nothing to do with it.
take the hose off the car (1 minute of work) and that'll give you more room to see, and try the test again. |
||
|
11-20-2010, 09:30 PM
|
|
|
Registered
Join Date: Aug 2006
Location: SoFLA
Posts: 5,536
|
Quote:
|
||
|
11-20-2010, 09:34 PM
|
|
|
Checked out
Join Date: Jun 2009
Location: On a beach
Posts: 10,127
|
that, or maybe the orings for the fuel injector(s).
|
||
|
11-20-2010, 09:38 PM
|
|
|
|
Registered
|
Just as easy but a lot less messy, use a propane torch, NOT ignited of course.....if you need to reach in hidden or hard to reach areas, place a section of hose over the end of the torch. Ive been using this method for similar for over 30 years.
__________________
Mike Valley Grande, AL 1987 911 Targa, White |
||
|
11-21-2010, 06:03 AM
|
|
|
Fleabit peanut monkey
|
The intake for the air cleaner is just a few inches away. Could be that some of the spray fluid is just getting in there.
I have found the smaller leaks are pretty fussy about having the spray directed right at them to allow enough fluid to get in to increase the idle. |
||
|
11-21-2010, 09:23 AM
|
|
1987 Porsche 911
Wifes toy
1981 Porsche 911 SC Targa
