Need Help On Gt500 (2007)

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BrianB

New Member

May 3, 2013

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Lancaster, Pennsylvania

Jul 19, 2013

#1

• Jul 19, 2013

• #1

Hopefully someone can help me. Yesterday I installed a JLT CAI intake and used a custom tune from Brenspeed. The car ran awesome when I took it for a test drive last evening.
This morning I took the car into work and now I'm having bucking problems when accelerating. I also had it stall out on me when I come to a stop. (RPMs drop down to 200 when downshifting). The car does idle between 900-1000 when I'm at a stop sign, but have had it fluctuate.

I'm guessing I have a leak in the CAI? Thought/Opinions?

Brian

 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor

Admin Dude

Jan 4, 1985

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Jul 19, 2013

#2

• Jul 19, 2013

• #2

Reflash back to the stock tune. Run the car a while to see how it acts. If it runs well then try flashing the Brenspeed tune again. Verify that you're running the correct octane rated gas for the tune that you're loading.

 

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BrianB

New Member

May 3, 2013

4

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2

Lancaster, Pennsylvania

Jul 19, 2013

#3

• Jul 19, 2013

• #3

I'll reflash it this evening to the stock tune and take it for a test run. Problem is need the car to go to a wedding tomorrow so I guess I'll be busy tonight. Thanks for the input

 

Bullitt347

I have been doing it wrong this whole time

15 Year Member

Mar 23, 2007

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Middle of Maine

Jul 19, 2013

#4

• Jul 19, 2013

• #4

Noobz347 said:

Reflash back to the stock tune. Run the car a while to see how it acts. If it runs well then try flashing the Brenspeed tune again. Verify that you're running the correct octane rated gas for the tune that you're loading.

Click to expand...

If you reflash back to stock tune, you have to re-install the stock air box/inlet. The car will not run right with the JLT and no tune to make it work.

 

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OsirisGT

Member

Nov 12, 2005

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San Diego

Jul 19, 2013

#5

• Jul 19, 2013

• #5

Do the little things too like make sure the plugs / connectors are still seated, the intake is still mounted well. I had a problem with a buddies for about a block like this and we forgot to plug the MAF back in.

 

SpartaPerformance

10 Year Member

Nov 5, 2006

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Long Island NY

Jul 21, 2013

#6

• Jul 21, 2013

• #6

Sounds like maybe intake tube might have a leak somewhere, make sure connections are tight.