LB7: Strange intermittent power loss??

CDR

New member
Apr 19, 2009
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Well Here it goes LB7 2001 with 2002 OS system MBRP exhaust ARE intake. Here the issue with a stock tune it runs perfect. The second I do anything as far a tunning it develops an issue. Now I know what everyone is thinking I don't know how to properly tune so I bought a PPE tunner and it did the same thing....

From a dig floor it hammers off the line all the way to 100mph no problems

From a roll barely will accelerate when floored. goes faster if petal is at %50 rather then %100 Rail pressure is perfect is perfect throttle sensor registers %100

If you stop dead and go from a dig it will accelerate perfect again

Im lost any help I would appreciate!
 

CDR

New member
Apr 19, 2009
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When this happens fuel always restricts to 32mm!

Please some one help me!:(
 

CDR

New member
Apr 19, 2009
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Have not shimmed or bottle tested it. Again rail pressure is on point but the the commanded MM's won't go higher then 33mm when this happens
 

CDR

New member
Apr 19, 2009
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No not at all. I hope I'm explaining this right. From a dig it run perfect! normal smoke good boost. from 30 mph if you floor it almost NO boost only 33mm commanded injector.
 

CDR

New member
Apr 19, 2009
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I can't figure out how to upload the log file if anyone wants to take a peek I can email it
 

02greysixer

Active member
Jun 4, 2011
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North Central FL
If you have efi why not disable the egr and see how it acts?
Maybe the egr is opening at part throttle and when you hammer on it the turbo blows it open? I'd guess it's closed at idle and the turbo can't blow it open from the fully closed position. Just grasping at straws for you
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