srt4 lt fuel -33 and st -20 any help

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waynekopp
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Joined: Sun Feb 28, 2010 1:50 am

srt4 lt fuel -33 and st -20 any help

Post by waynekopp »

my 05 srt4 is pulling 2 much fuel at idle long term is -33 and short term is -20 and my a/f are 13.5 at idle and around same under boost. I have checked everything i can think of upstream 02 map sensor iac sensor and tps sensor and there wireing. any help please. the only way i can get it to stop pulling fuel at idle is creat a vacuum leak but my a/f is still reading the same. I am lost.
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mikel
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RE: srt4 lt fuel -33 and st -20 any help

Post by mikel »

have you changed injecotrs, or MAP/TIP sensors?
Mike Litsch
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waynekopp
Posts: 11
Joined: Sun Feb 28, 2010 1:50 am

RE: srt4 lt fuel -33 and st -20 any help

Post by waynekopp »

yes and no. This is all happening on a stock tune with stock injectors and map and tip. I have bigger injectors and 3 bar map and tip buy tune shop told me i need to get this problem fixed first cause they couldnt fix it with a tune.
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mikel
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RE: srt4 lt fuel -33 and st -20 any help

Post by mikel »

exhaust leaks?

bad O2 sensors?
Mike Litsch
DiabloSport Brand Manager
Diablo Tech support by phone:
561-908-0040
M-F 8:00 AM to 5:00 PM EST

[email protected]
waynekopp
Posts: 11
Joined: Sun Feb 28, 2010 1:50 am

RE: srt4 lt fuel -33 and st -20 any help

Post by waynekopp »

Well the car has the 3 inch down pipe from turbo and then 3 inch to a turn down under car with no cat. There are no leaks as there is not much to leak. The upstream 02 has been replaced as thats the one i was aware that controled that. The other 02 as fare as i know is just for the cat whitch is not there. There are no codes in car. I am lost and dont know what else to check as i have checked everything i know of and some things twice. I cant even enjoy car or what the diablo will be able to do for car as it is not running right.
duster360
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RE: srt4 lt fuel -33 and st -20 any help

Post by duster360 »

Post a log using these PIDs: http://www.srtforums.com/forums/f384/wh ... og-484265/

include idle and part throttle cruising. Be sure the engine is fully warm and use the STOCK tune
Needless Torque Calibrations
www.needlesstorque.com
waynekopp
Posts: 11
Joined: Sun Feb 28, 2010 1:50 am

RE: srt4 lt fuel -33 and st -20 any help

Post by waynekopp »

will do as soon as i get a chance as i can not get the driver to work on my computer so i have to use a friends
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ptperformance
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Joined: Mon Mar 30, 2009 5:54 pm

RE: srt4 lt fuel -33 and st -20 any help

Post by ptperformance »

How many miles on the car? You could have a plugged fuel filter/regulator. If you have a bad o2 sensor normally the ST fuel trims will not adjust so I suspect that is not the problem.

I see that this is a few months old so I hope that you got the problem fixed.
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