Sputtering under light load... why?
Thread Starter
Cruising
Joined: Dec 2017
Posts: 12
Likes: 6
From: Long Island, NY
Sputtering under light load... why?
Hey guys, I did headers (catless) and a Vararam intake on my '05 manual C6 early in the summer without a tune and had no issues up until this week. The car runs fine until it gets up to full operating temperature. Once it's warmed up it seems to sputter from 1000- 2000 rpms in 1st and 2nd gear during a light load. In 3rd 4th 5th 6th in this range even with a bit of throttle it is completely fine. The weird part is that there are no codes being thrown and it has been happening on a pretty consistent basis now and is starting to puzzle me. Also, I'm from NY and the only change that's happened since the headers would be the colder weather and possibly the blend of gasoline at the pump.
FYI: When I did the work I put in brand new spark plugs, MSD wires, new O2s and heat taped all the wires when I did the job. Shouldn't be spark related...
Could it be that it needs a simple tune? Cam-position sensor? Maybe fuel/ fuel injector related?
FYI: When I did the work I put in brand new spark plugs, MSD wires, new O2s and heat taped all the wires when I did the job. Shouldn't be spark related...
Could it be that it needs a simple tune? Cam-position sensor? Maybe fuel/ fuel injector related?
Last edited by Jxtn; Oct 23, 2018 at 11:12 PM.
Le Mans Master
Joined: Jan 2006
Posts: 6,642
Likes: 450
From: Texarkana Texas
My guess would be the colder air temps are messing with it. Just a guess. Get it tuned...you will love it. I had an 05 auto and did the same thing you did, but I had mine tuned. Big difference in seat of pants feelings.
Thread Starter
Cruising
Joined: Dec 2017
Posts: 12
Likes: 6
From: Long Island, NY
Thread Starter
Cruising
Joined: Dec 2017
Posts: 12
Likes: 6
From: Long Island, NY
Team Owner
Joined: Aug 2006
Posts: 25,105
Likes: 3,156
C6 of Year Finalist (appearance mods) 2019
Could be the MAF or it's connection. I put in a aftermarket MAF that did the same thing your experiencing. OEM MAF fixed it right up.
Last edited by wayback; Oct 24, 2018 at 07:06 PM.
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Thread Starter
Cruising
Joined: Dec 2017
Posts: 12
Likes: 6
From: Long Island, NY
I inspected the connection and everything looked okay. I unplugged it and connected again just to make sure. Doing this didn't change anything. My question is, wouldn't a bad MAF sensor throw a code? I'm getting no indication of a MAF problem