| common. My first N/A Z would hold proper fuel pressure indefinitely regardless of temperature fluctuations and without clamping anything. My current TT Z doesn't hold pressure unless I clamp the lines (If I do that it will hold forever). Annoying but doesn't affect anything as far as I can tell. It sounds like you may have an injector leaking as you lose fuel pressure with the lines clamped. This would also make sense based on your wild afr numbers. Also pull off the vacuum line of the dampener and regulator and check for fuel wetness/smell. You can also test the fuel rail/injectors with air. Remove the return line and put a bolt and clamp in the end. Pressurize the lines. This is handy to do with the plenum off as you can locate which injector or seal is leaking using soapy water.
'91 TT |
