C7 Z06 Misfire just above Idle 5836 miles - CorvetteForum - Chevrolet Corvette Forum Discussion



C7 Tech/Performance
Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

C7 Z06 Misfire just above Idle 5836 miles

Reply
 
 
 
Thread Tools Search this Thread
Old 10-20-2017, 12:31 AM   #1
mrxclusive21
Junior Member
Thread Starter
 
Member Since: Oct 2017
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Default C7 Z06 Misfire just above Idle 5836 miles

I recently purchased a 2016 Z06 with Z07 package car has 5836 miles . I kept getting a check engine light so I took it in to be checked out . so far they have checked the injectors , rocker arms & Valve springs & nothing seems to be wrong . the issue has now been escalated to tier two trouble shooting & they are recommending that the Heads be pulled off of the car ! the car is bone stock , I've seen other people have issues with the motors just wondering if I can get some advice as far as what options I should exercise as far as wanting a new motor or asking them to take the car back. Ive had it a total of 33 days and its been in the shop 11 of them.
mrxclusive21 is offline   Reply With Quote
Old 10-20-2017, 01:09 PM   #2
DAVE396LT1
CF Senior Member
 
DAVE396LT1's Avatar
 
Member Since: Jul 2003
Location: Redmond WA
Posts: 5,825
Thanked 1,013 Times in 678 Posts
Default

Keep a logbook of dates that it is in the shop along with paperwork. In the unlikely event you need to lemon law the car later, better to have your details in order and organized up front.

All that said removing the heads isn't cataclysmic, I could do that reliably myself, so a GM tech should have no trouble.

I wouldn't think you have any ground to stand on for a new motor or a new car due to a misfire yet!
DAVE396LT1 is offline   Reply With Quote
Old 10-20-2017, 02:25 PM   #3
robert miller
CF Senior Member
 
robert miller's Avatar
 
Member Since: Jan 2007
Location: cookeville tennessee
Posts: 23,779
Thanked 594 Times in 546 Posts
Default

Quote:
Originally Posted by DAVE396LT1 View Post
Keep a logbook of dates that it is in the shop along with paperwork. In the unlikely event you need to lemon law the car later, better to have your details in order and organized up front.

All that said removing the heads isn't cataclysmic, I could do that reliably myself, so a GM tech should have no trouble.

I wouldn't think you have any ground to stand on for a new motor or a new car due to a misfire yet!
Even more on the log on what was told to you my dealer & also date's & remarks all of them..

ASK THEM can they nail it down to just one of the 8 hole, Maybe a bad plug r bad plug wire r being a little off the coil r plug, are even a bad coil. You have said inj good so not that & springs & all.

Last edited by robert miller; 10-20-2017 at 02:29 PM.
robert miller is offline   Reply With Quote
Old 10-21-2017, 06:08 PM   #4
Little Red Corvette1
158.4 half 191.5 mile
Support Corvetteforum!
C7 of Month Finalist 2016
 
Little Red Corvette1's Avatar
 
Member Since: Aug 2014
Location: Denver Colorado
Posts: 226
Thanked 23 Times in 19 Posts
Default Spark plugs can fail early on blown engines.......

I had a similar issue at a one mile race. The issue was spark plugs at about 8,000 miles. They look good. The platinum coating wears off, I hear? Below are pics:





Little Red Corvette1 is offline   Reply With Quote
Old 10-21-2017, 07:02 PM   #5
NSC5
CF Senior Member
Support Corvetteforum!
 
NSC5's Avatar
 
Member Since: Aug 2012
Posts: 3,295
Thanked 680 Times in 480 Posts
Default

As Robert said they need to nail it down to which cylinder (or cylinders) have the issue. The ECM tracks and reports a misfire count by cylinder so it would make no sense for them to be pulling both heads unless it has the odd case of a misfire on both sides.

An engine that runs normally at idle but misfires above that range most likely has a defective coil pack, plug, or connector. If it is actively misfiring while driving the CEL should be flashing during the misfire event; this is standard behavior for the OBD-II system because it indicates a condition where raw fuel (due to misfire) could be entering the cats leading to severe overheating.
NSC5 is offline   Reply With Quote
Old 10-21-2017, 09:55 PM   #6
robert miller
CF Senior Member
 
robert miller's Avatar
 
Member Since: Jan 2007
Location: cookeville tennessee
Posts: 23,779
Thanked 594 Times in 546 Posts
Default

Quote:
Originally Posted by NSC5 View Post
As Robert said they need to nail it down to which cylinder (or cylinders) have the issue. The ECM tracks and reports a misfire count by cylinder so it would make no sense for them to be pulling both heads unless it has the odd case of a misfire on both sides.

An engine that runs normally at idle but misfires above that range most likely has a defective coil pack, plug, or connector. If it is actively misfiring while driving the CEL should be flashing during the misfire event; this is standard behavior for the OBD-II system because it indicates a condition where raw fuel (due to misfire) could be entering the cats leading to severe overheating.
Plus OP as this other guy has said on the plug problem, On these DI motors are set up plugs in these cars can look 100% good but it can be total bad fault out are like he has said to you.

Ask me also how I know that a tuner are so called one had my car couldn't get it to run per say at all on its on. Yes would start then just start misfiring like crazy then die. I told him to chg out the plugs in the car. He day after day would say couldn't find the problem but the plugs was good. After over 2 weeks of him saying he has done this & that but no chg I told him I was coming after the car.

He then chg out the plug & car ran like a dream. So get it to someone that can tell you which hole it is & just work on that hole. Are if me & I had the car I would chg out the plug myself & make sure all plug wires are really good on both ends.
robert miller is offline   Reply With Quote
Old 10-22-2017, 10:36 AM   #7
snomuncher
CF Senior Member
 
Member Since: Mar 2015
Posts: 131
Thanked 25 Times in 21 Posts
Default Misfire

Had a misfire on mine with just over 200 miles on the odometer. Dealer diagnosed it as one bad plug/wire on one cylinder. After replacing that plug and wire all is good.
snomuncher is offline   Reply With Quote
Old 10-22-2017, 12:13 PM   #8
robert miller
CF Senior Member
 
robert miller's Avatar
 
Member Since: Jan 2007
Location: cookeville tennessee
Posts: 23,779
Thanked 594 Times in 546 Posts
Default

Quote:
Originally Posted by snomuncher View Post
Had a misfire on mine with just over 200 miles on the odometer. Dealer diagnosed it as one bad plug/wire on one cylinder. After replacing that plug and wire all is good.
Glad your dealer had a good service guy that got it. Guy you cant look at these plugs from this LT motor & just from looking think it is good just from the looks of it.

Plus also only play around with the plug wires & it feels like it is good on the plug that thing is a bear to fully be on it so you don't get a misfire. Robert
robert miller is offline   Reply With Quote
Old 10-24-2017, 01:16 AM   #9
mrxclusive21
Junior Member
Thread Starter
 
Member Since: Oct 2017
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Default Update

Thanks for all of the replies and info . Unfortunately the dealership has yet to come up with anything & I told them if the have to pull the heads of the car I no longer want it . I called GM customer service and also let them know how I felt about the situation . Iím pretty sure it sounds like Iím Being a Tight A** but this whole situation has kileld my vibe. I have headers , pulley , meth kit & haltech AC & heat exchanger upgrade sitting in the garage that were scheduled to go on this car at the end of November . Luckily for me they werenít on before it took a dive .

A GM field Engineer has been scheduled to come out this week . I guess Iíll have to wait and see what happens .
mrxclusive21 is offline   Reply With Quote
Old 10-31-2017, 09:10 PM   #10
mrxclusive21
Junior Member
Thread Starter
 
Member Since: Oct 2017
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Default Update 3/31

So the computer has been changed as recommend by the GM field engineer they have also changed the tensioner pulley which I have no idea why . I asked them for my money back based on the fact itís been almost 30 days and they have no idea what is wrong with my car .
mrxclusive21 is offline   Reply With Quote
Go Back   CorvetteForum - Chevrolet Corvette Forum Discussion >
Reload this Page
  • C7 Z06 Misfire just above Idle 5836 miles
  •  
     
    Reply

    Related Topics
    Thread Thread Starter Forum Replies Last Post
    C5 wheel upgrade brentstewart50 C5 General 43 04-27-2017 10:35 PM
    Shark Gray out--LBR in. DRLC5 C7 Z06 Discussion 14 07-10-2016 08:41 AM
    A&A Supercharger Kit with 25% UD pulley LiteraCola C5 Forced Induction/Nitrous 10 06-24-2016 03:07 PM
    Gloss-It 2015 Corvette Stingray PPF Bumper Wrap and High Gloss Sealant Gloss-it Car Care Discussion 0 04-25-2016 07:02 PM
    1986 Yellow Pace Car Black Top 4+3 Manual chris1 C4s for Sale/Wanted 0 01-24-2016 03:04 PM


    Thread Tools Search this Thread
    Search this Thread:

    Click for Advanced Search

    Posting Rules
    You may not post new threads
    You may not post replies
    You may not post attachments
    You may not edit your posts

    BB code is On
    Smilies are On
    [IMG] code is On
    HTML code is Off
    Trackbacks are Off
    Pingbacks are Off
    Refbacks are Off

    Forum Jump

    Sponsored Ads
    Vendor Directory

    All times are GMT -4. The time now is 09:53 PM.


    We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
     
    • Ask a Question
      Get answers from community experts
    Question Title:
    Description:
    Your question will be posted in: