yes, vacuem leak can do that. on my audi 90 I did a full engine compartment vacuem swap. and I wanted to start the car with couple houses off. car catched but died next seconed. do as I did, I took one short hose, when to a part shop, bought regular rubber house with same size about 1m-1.5m and next think I removed each hose 1 by 1 and swaping it for new. Now I have lower RPM idle and more stable.
do that and attened to your O2Sensor. check it by unpluging it from the hole system and cheking its volatge and/or resistance. it should not have no 0 or infinite resistance between any wires. 3 wires are ground, power, output or power, power, output. dont remember wich one.
retarted ignition means that the mix inside your engine is ignited it later while it should ignite it earlier to the Top point. it may couse uncomplite burning which will couse low boost build up and hard start up.
you can buy an OEM sensor or univerasle:
http://cgi.ebay.com/ebaymotors/NEW-B...spagenameZWDVW
or you can build an Oxygen sensor simulator, which you might feel unatical:
http://www.mazda626.net/index.php?ac...b1f0e08f0401b5
also CEL helps a lot.

 

ok thanks for the info. im at school right now but ill talk to you later. and they blocked ebay at school so i cant see the o2 sensor.

 

auxiliary idle air bypass valve very common fault, pipe breaks/gets gunked up/valve gets gunked up bad starting/idling is the result

 

where would this be located? thanks

 

Another source for problems that is often overlooked is the injector seals. The rubber eventually gets hard and shrinks or cracks.

 

hey. i still have problems. i cant find the injector seals. or the injector itself. where is it? i have pictures of the engine and a short video of it running and you can hear sounds like whistling... check it out. sorry about the 45 second wait to download the file. my ftp is down... if somone could draw out places on the pictures on where to look for leaks that would be great. thanks.

http://www.bigupload.com/d=2814

or

http://d9.yousendit.com/E/0294QFEXQ1...V/audi5000.rar

they are the same file

 

we call it the audi 200 now I can look for info

[IMG]local://upfiles/12092/DE77808A013345FA8D21C05E496F03E4.jpg[/IMG]

 

pictures

 

#3&4

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[IMG]local://upfiles/12092/CF0A5DF752474371897E807FC2D8910A.jpg[/IMG]

 

#5&6

[IMG]local://upfiles/12092/ECF3ACC96D334112A20034E839C02773.jpg[/IMG]

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