Rough when declerating....
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Joined: Apr 2014
Posts: 98
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From: Shelton Ct
St. Jude Donor '17
Rough when declerating....
Not sure if this is the right section to put this in but, I have a 2007 vert, LS2 6 speed with 20,000 miles. Only mods are Airaid intake, Custom tune from Diablew, axleback Corsa Extreme and Vitesse throttle controller.
When I start the car it appears to idle smooth. When I am accelerating or have the car under power the car runs great but when I let off the gas, slowing down and coasting the car has a rough idle and has a small surge or buck, not really sure how to describe it.
I don't remember it happening last year and just want to know is this something to worry about, could it be from the gas from last year, still do not have a full fresh tank in or is this how the LS2 just runs.....
Thanks for your help and I could only wish that I knew half the stuff you guys out there knew about engines and cars.
When I start the car it appears to idle smooth. When I am accelerating or have the car under power the car runs great but when I let off the gas, slowing down and coasting the car has a rough idle and has a small surge or buck, not really sure how to describe it.
I don't remember it happening last year and just want to know is this something to worry about, could it be from the gas from last year, still do not have a full fresh tank in or is this how the LS2 just runs.....
Thanks for your help and I could only wish that I knew half the stuff you guys out there knew about engines and cars.
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Joined: Dec 1999
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Hard to tell from your description BUT, it could be a misfire due to a VACUUM LEAK.
The very first thing that I would do is inspect ALL the ducting from the MAF to the Throttle Body.
Then inspect the piping and rubber fittings for the Positive Crankcase Vent System.
Any way you can record what is going on and post the results??
BC
The very first thing that I would do is inspect ALL the ducting from the MAF to the Throttle Body.
Then inspect the piping and rubber fittings for the Positive Crankcase Vent System.
Any way you can record what is going on and post the results??
BC
Last edited by Bill Curlee; May 11, 2016 at 12:11 PM.
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Joined: Mar 2011
Posts: 534
Likes: 33
From: Southern cali
To add to your check list....
check to make sure your spark plug wires are tight .. both at the sparkplug and coil pack... I have seen what you describe when there is a loose or poor fitting sparkplug wire.
check to make sure your spark plug wires are tight .. both at the sparkplug and coil pack... I have seen what you describe when there is a loose or poor fitting sparkplug wire.
