2011 Shelby studdering on the way home tonight.

[RedVenom48]

.30 to .32 is a good gap. TR7IXs are a very durable iridium plug. I change mine out every year, but its for max performance, not because I NEED to.

 

[1st usa car]

I just changed my fuel filter - i had some stuttering too 3&4 gear when trying to keep the rpms around 2500 --- now it is gone.

 

[moncho]

Glad you got it sorted out.

 

[forsho]

LOL that wasen't me... but tonight I'll install the fuel filter/plugs/belt and report back.

 

[forsho]

was spark plugs, all good now... back to normal

 

[1st usa car]

that was easy --

 

[moncho]

For what it's worth the data log files seem to point to the plugs. Spark dropped drastically when the RPM dropped (studder) while the load demand increased.

Cheers,
Ray

 

[forsho]

well... minus me pulling the battery and reflashing my Lund tune, now the car is surging just a tad at idle and has stalled pulling up to a few stop lights. I'm sure that the battery is due for replacement and the HE fans and stereo are not nice to it either.

I'm remembering it taking a bit to settle into the tune and before the high idle at stop lights returned.. I'll drive it a bit and report back but it seems fine.

 

[RedZR]

Did you check the alternator output with your scanner


Sent from my iPhone using svtperformance.com

 

[RedVenom48]

well... minus me pulling the battery and reflashing my Lund tune, now the car is surging just a tad at idle and has stalled pulling up to a few stop lights. I'm sure that the battery is due for replacement and the HE fans and stereo are not nice to it either.

I'm remembering it taking a bit to settle into the tune and before the high idle at stop lights returned.. I'll drive it a bit and report back but it seems fine.

Stock tb? My stock TB lund tunes do that. Aftwr a few drive cycles, the stalling the occasionally occurs clears up. To be honest, i never contacted Lund about it. Ironically enough, my Lund Monoblade tune doesnt do any of that.

Either way, idle quality is excellent. With stock TB, I got used to downshifting to 2nd and riding out the decel.

 

[forsho]

nope - running the VMP 67 TB, but it did settle out and is almost back to the short high-idle pulling up to lights like normal - only stalled a few times that first time out.

Everything seems great and back to Shelby-tastic as always - once I get my daily sorted I'll start saving for a VMP 2.3 upgrade!

Thanks all for the input, SVT to the rescue again!