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beepbeep beepbeep is offline
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Join Date: Jun 2001
Location: Sweden
Posts: 5,515
Hello!

As Alan said, pressurizing the system is sure-fire way of finding leaks. Usual culprits are cracked phenolic injector blocks. If they are cracked, they will leak no matter how much you tighten them. Distorted intercooler O-rings are also common, as are leaky hoses.

Best way is to pressurize all south of CIS. There is a rubber hose hoing down to turbo...if you can jam something in it and pressurize the system, it will leak trough most common "leaky points".

I believe your phenolic blocks are most probable suspect. Once leaks are down to minimum, you still might have fueling problems that needs to be tackled.

But you have to start with plugging all leaks. You can check wastegate for leaks by trying to blow air to it. If you suspect wategate leak, you can try starting car with wastegate hose detached and plugged. (Little leackage trough valve stem is OK. Lot's of leakage means ruptured wastegate diaphragm).

So to round it off:

1. Pressurize the system, plug the leaks.
2. Find out if wastegate is OK.
3. If still not OK, start ckecking fueling components (fuel pressure, controll pressure etc.)

P.S. While at it, make sure both pumps are running and that injector flow is OK
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Thank you for your time,
Old 07-27-2008, 03:36 PM
  Pelican Parts Technical Article Directory    Reply With Quote #41 (permalink)