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Sputtering idle... left engine bank only?

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Sputtering idle... left engine bank only?
Old November 2nd, 2019, 12:19 PM   #1
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Sputtering idle... left engine bank only?

2006 SRT10. Looking for some advice and ideas on what the hell could be the issue. From shortly after start, idles extremely rough, sputtering and hesitating. Discovered this to be from the drivers side only, after walking around the car with it idling. Exhaust note coming out of passenger side seems normal. Yet from the drivers side sounds like it’s almost ready to stall. Connected SCT x3 to check for codes... No codes, which seems crazy to me. I’m baffled. Any ideas or advice welcome.
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Old November 2nd, 2019, 02:38 PM   #2
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Stock exhaust?
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Old November 2nd, 2019, 03:45 PM   #3
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Possible plugged cats.
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Old November 2nd, 2019, 04:42 PM   #4
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Possible plugged cats.
My guess too, but with stock exhaust crossing over I wanted him to check the correct side.
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Old November 2nd, 2019, 05:03 PM   #5
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Quote:
Originally Posted by Ramtuff View Post
Quote:
Originally Posted by 99RT10>S View Post
Possible plugged cats.
My guess too, but with stock exhaust crossing over I wanted him to check the correct side.
No, cats replaced with high flow cats and Corsa cat-backs. Should have included that info from the get go. Dyno tuned about 5 months ago by Zen Racing. Problem only recently started.
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Old November 2nd, 2019, 07:02 PM   #6
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I know right? My washing machine quit working, what do you think is wrong?

I would start with checking plugs to try and isolate a cyl.
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Old November 2nd, 2019, 09:36 PM   #7
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I know right? My washing machine quit working, what do you think is wrong?

I would start with checking plugs to try and isolate a cyl.

I know, I’m a dumbass. lol. I got wrapped up in trying to explain the issue, which yeah, how the hell do you put in words something like this. I appreciate the help, Ramtuff.
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Old November 4th, 2019, 05:26 PM   #8
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Invest in a scan tool that monitors data. Should take you right to the issue.
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Old November 6th, 2019, 09:15 PM   #9
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Invest in a scan tool that monitors data. Should take you right to the issue.
GRCFORCE327, I was thinking about that earlier today, and I appreciate the input. Any recommendations on a particular brand or model?
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Old November 10th, 2019, 08:14 AM   #10
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I think i read somewhere that our 2000’s vintage ecu’s were not good at picking up a misfire. Possibly not good on purpose. Computers were slow back then and the engine has an un-even firing order. Very hard for a vintage ecu to determine what was normal and what is a misfire. How could dodge sell a car that always popped a code of Pxxxx = code reads “engine sounds like a harley davidson motorcycle mating with a ups truck”. Easy solution for dodge was to make it not catch a misfire

Anyway, how old are your plug wires? Plugs? Change them out. While plugs are out, do a compression or even better a leakdown test on all cylinders. Next check injectors. Or you could check them first. Depending on your time/ money situation, You could pull the injectors and swap them left to right. See if the misfire moves to the other side
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Old Yesterday, 08:29 PM   #11
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Originally Posted by Lj60 View Post
I think i read somewhere that our 2000’s vintage ecu’s were not good at picking up a misfire. Possibly not good on purpose. Computers were slow back then and the engine has an un-even firing order. Very hard for a vintage ecu to determine what was normal and what is a misfire. How could dodge sell a car that always popped a code of Pxxxx = code reads “engine sounds like a harley davidson motorcycle mating with a ups truck”. Easy solution for dodge was to make it not catch a misfire

Anyway, how old are your plug wires? Plugs? Change them out. While plugs are out, do a compression or even better a leakdown test on all cylinders. Next check injectors. Or you could check them first. Depending on your time/ money situation, You could pull the injectors and swap them left to right. See if the misfire moves to the other side
Wires are possibly original, Idk. Car has just over 17K miles. Plugs are fresh...changed them about 5 months ago (maybe 1K miles on them). While pulling plugs (started on the Drivers side with the issue), found the rear most (most pita one on that side) plug severely under gapped at like around.020 ish. Should be.035 if I'm correct. All others were at.035. Regapped it correctly...problem seems to have gone away. Running great again. Cautiously optimistic, we'll see. Thank you for your input!
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