Unplug the electrical connectors to it. If the car suddenly idles better, that's probably the culprit.
I've mentioned before, an easy way to check for vacuum leaks is to take a propane torch and crack the gas valve open a little. As the car idles, run the tip of the torch around the hoses, joins, gaskets, etc... anywhere a leak could be. If the idle suddenly surges, then you've found a leak.
17536/16555 came up because my MAF was dirty. I went and bought some CRC electronics cleaner and cleaned it. Slipped it back in and went away. However, now my MAF is having issues again, so I am replacing it. Found it for under $60 on eBay.
just replaced the plugs last week and coils were done recently. I think the leak is the caused, I just don't know the easiest way to find it. Gonna check the MAF reading now.
So maf seems fine. I unplugged the wire but still idling funny. I keep getting code 17705 check DV thing everytime I cleared the codes, could that be the problem?
hi I have a 2004 Volkswagen Passat 1.8t and at idle it has a miss like almost would want to turn off, but it runs great though. What did you find on your car???? I have changed plugs, coils, filters etc.
please help gjav65
I think I didn't have a problem with the idle, but that was because the crack was not as severe as yours looks. Some idle problems can be attributed to vacuum leak. But in my case, the only thing I noticed was the lack of power.
You can make your own pressure tester from plumbing PVC at Home Depot or the like. I have one that I made. I also searched and see that there are at least two sites that have a how to for making one. Basically I disconnect my Air box and plug the pressure fitting into that. I don't have the time to type it all right now but you get the hint. Put an air hose on the fitting and turn the compressor up to about 25 psi. Look for any leaks. you'll find them. Unless it's electrical. Good luck.
Have you checked the diverter valve? If it's leaking (passing air) you won't catch that with a boost leak tester.
The noise in the video could be a number of things. One of those things it might be is air passing through a hole/cut/split in a hose and making a humming noise. A ruptured Diverter Valve diaphragm may also hum, but I don't know if you'd get that at idle.
Best advice so far was the suggestion to make a boost leak tester and see what shows up.
As for the propane trick, that's something I used to use all the time on older engines. On these newer computer controlled and idle stabilized engine systems, it doesn't work as well. The engine has to be running super lean beyond the ECM's ability to compensate before you see any change in idle. If it isn't that far out of whack, the computer will compensate and when the propane is added, the computer stops compensating. You may not detect any change in idle because the system responds so quickly. So in other words, if the propane trick fails to pinpoint a leak, that does not mean you still don't have a leak. It just means the ECM can compensate for the leak faster than the propane trick can point it out.
Looks like I'm building a smoke machine. Just checked the DV and it's fine
any idea other place to look for leak? Oh there is hissing somewhere around oil dip stick. Anything I should look there?
Check your crankcase breather tube. Its very fragile . If you inadvertently pull the lower pcv hose it may break,mine did. Its near oil filter housing. http://www.ecstuning.com/Search/06A103213F
Thanks! will check it tonight. car is still on ramp
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