Subject	Hmmmm interesting could be fuel pump control unit
Posted by	John (MD) on October 01, 2010 at 1:02 PM
	This message has been viewed 99 times.
In Reply To	1st Dyno Pull - Need some professional opinions... posted by MAD_96TT(ATX) on September 30, 2010 at 09:50 PM
Message	before mine went out I saw a noticeable drop in fuel pressure at only wot this happened for about a month and then the unit went out all together resulting in me getting a used one from bernie. This was also my daily driver as well. Check fuel pressure and change the fuel filter if it has not been changed in the last 20,000 to 30,000 miles. There is no way it is a boost leak as others have suggested unless you have a hose that is getting ready to come off between the air filter and turbo and even if you did have that the car would not run well at all. Also ohm all the injectors as well just to be on the safe side it is very easy to do they should be between 10 and 14 ohm's I believe.
Follow Ups	1st Dyno Pull - Need some professional opinions... - MAD_96TT(ATX) 21:50:01 09/30/10 Wow, that's lean. Looks like a decent sized boost leak - Ghoztt (CO) 22:21:29 09/30/10 That is something I haven't checked yet...Fuel Pressure. - MAD_96TT(ATX) 22:36:41 09/30/10 Boost leak = rich - ztunerz 22:38:38 09/30/10 That's what I was thinking. The dip in torque looked - MAD_96TT(ATX) 22:42:36 09/30/10 wouldn't that depend on where the leak is? (n/m) - Ghoztt (CO) 22:44:31 09/30/10 no. - Halo TTZ 22:47:56 09/30/10 Ok, cool. Good to know. I guess I was thinking that - Ghoztt (CO) 22:57:35 09/30/10 The leak between the maf and turbo would have to be - ztunerz 09:22:31 10/01/10 pulling timing due to timing? I think you mean detonation. (n/m) - MixManMash 15:34:56 10/01/10 Correct, getting old, can't type (n/m) - ztunerz 00:32:13 10/02/10 2nd (n/m) - John (MD) 12:47:51 10/01/10 vacume leak? additional air not being metered? (n/m) - ForceFedTT (SoCal) 22:45:33 09/30/10 vacuum is always hovering around 21-24in Hg (n/m) - MAD_96TT(ATX) 22:48:45 09/30/10 Forgot to mention that I run 93 octane. (n/m) - MAD_96TT(ATX) 22:29:35 09/30/10 is your EGR still in? does your Z ever leave oil drops? (n/m) - FuerGrissa 22:36:15 09/30/10 EGR is still in for now. The only time I've seen oil was - MAD_96TT(ATX) 22:41:11 09/30/10 your cam covers and crank case get preasurized - FuerGrissa 22:57:44 09/30/10 I'm kinda leaning towards EGR as well. (n/m) - MAD_96TT(ATX) 23:02:21 09/30/10 Egr does not work at wot (n/m) - ztunerz 09:28:38 10/01/10 I would feel uneasy about pushing it with those a/f's. - HighPsi (NorCal) 22:47:20 09/30/10 Good numbers but as said do a boost leak test (n/m) - craigz96tt 10:27:11 10/01/10 Hmmmm interesting could be fuel pump control unit - John (MD) 13:02:02 10/01/10
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