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6th Gen ('00-'05): Hesitation around 1500 RPM

  #1  
Old 07-26-2018, 07:07 PM
Thread Starter
Join Date: Apr 2018
Posts: 10
Default Hesitation around 1500 RPM

05 Monte Carlo SS 3.8L SC - 110K Miles

I'm having a weird & inconsistent hesitation. Usually around 1500 RPM and 90% of the time going uphill. You can feel the car jerk a bit when it happens, but on a flat road it doesn't happen as much. I just had my plugs changed at 103K. I was thinking it might be the Cat building up back pressure, but not sure. I plan on replacing it anyways with a ZZP Down pipe & Cat.

I guess the jist is, what are your guys' thoughts on the issue, & if you have the ZZP Down pipe, how doesn't preform and sound?
 
  #2  
Old 07-26-2018, 08:09 PM
Join Date: Dec 2016
Location: SC
Posts: 149
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This is either an ignition or transmission problem most likely. How old are the plug wires? I had the same issue and it was a bad plug wire to cylinder #4 for me. Does the transmission shift smoothly?
 
  #3  
Old 07-26-2018, 08:29 PM
Join Date: Nov 2017
Location: Isanti, MN
Posts: 774
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I'm with SuperchargedMonte sounds like a plug wire , are they the original set ? A few other idea's might be fuel filter, air filter and brand of plugs or perhaps you cracked the porcelain on a plug or the gap on the electrode installing them Good luck.
 
  #4  
Old 07-26-2018, 08:47 PM
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Join Date: Apr 2018
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Originally Posted by SuperchargedMonte View Post
This is either an ignition or transmission problem most likely. How old are the plug wires? I had the same issue and it was a bad plug wire to cylinder #4 for me. Does the transmission shift smoothly?
Plugs re new as stated about 7K miles ago. Trans shifts fine.
 
  #5  
Old 07-26-2018, 08:51 PM
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Join Date: Apr 2018
Posts: 10
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Originally Posted by Jeffs02rwdSS View Post
I'm with SuperchargedMonte sounds like a plug wire , are they the original set ? A few other idea's might be fuel filter, air filter and brand of plugs or perhaps you cracked the porcelain on a plug or the gap on the electrode installing them Good luck.
Wires changed with plugs 7K miles ago. Filters were changed at my 100K tune up.

I don't think it's a trans. If it were a failing trans, it would hold gear and slam hard? Gear shifts are smooth. It's just a stutter going uphill at a certain RPM, rarely happens on flat ground, which is why I'm thinking my Cat or even MAF now that I think about it.
 
  #6  
Old 07-28-2018, 03:33 PM
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Join Date: Apr 2018
Posts: 10
Default *Update*

Car kept randomly stalling today. Figured I'd try something simple, unplugged my MAS and problems gone. Ordering a new one.
 
  #7  
Old 07-29-2018, 07:00 AM
Join Date: Oct 2009
Location: around cal city,il
Posts: 3,096
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Originally Posted by TheKnight41 View Post
Car kept randomly stalling today. Figured I'd try something simple, unplugged my MAS and problems gone. Ordering a new one.
Did you mean MAF? What brand did you go with?
 

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