C5 & C6 Corvette Engine Misfire Diagnosis (Complete DIY GUIDE!)

[@RetroCarsForever]

As a new C6 owner, I just wanted to say how much I appreciate your videos and your channel. This is clear, helpful, methodical troubleshooting.

[@JavaByter]

Love your videos. I've taken several notes over the past year of owning my C5 from your channel. Big thanks for taking the time to make these.

[@Toys4Life]

Appreciate the feedback!

[@danlaur7973]

Good job on this video 👍

[@Toys4Life]

I'm glad you like it

[@darrylsjodin7184]

Wow, thank you for sharing your knowledge! What would we do without you!

[@Glide1992]

In the old days I would use a vacuum gauge to look for a miss. Great video. Thanks a lot.

[@carbo2950]

And remember, always check to see what ever you touched you plugged back in. Most people have never seen the front of a Corvette. Thank you for chapter 6.

[@Toys4Life]

Indeed! 😁

[@cgallagher04]

You don’t need the scan tool to pull codes on C5/C6 you can pull codes on the dash display.

[@Toys4Life]

Negative on the C6. Agreed on the C5. I can't believe that slipped my mind! Thanks for the reminder 🎗️

[@cgallagher04]

@@Toys4Life I thought they brought that feature over to the C6 as well, My apologies.

[@dr1ver267]

Thanks for the video, your latest technical guides have been coming at the perfect time for me, and this one is no different!

[@Toys4Life]

Glad you like them!

[@robertratcliff2441]

Thank you for the info, my C6 #8 is miss firing great video

[@kenreeves846]

So is mine, what was the issue with yours?

[@nashrambler5246]

SOLID ADVICE!!! 👍🏻 You and I are on the same page.

[@Toys4Life]

Glad to hear it!

[@shaehatfield1899]

Great video and channel. I replaced the high and low pressure ac lines that meet at the compressor, low pressure line requiring me to remove the exhaust manifold, torqued everything to spec on my way out, now I’m getting a pop or two and chuggy/misfire feeling at low rpm’s at 1st gear. I ordered new gasket. Since they’re crush gaskets it’s the only thing I can think to be the issue. What do you guys think..02 Z06

[@Toys4Life]

If you have a scan tool - Look at your fuel trims, see if one bank is way off compared to the other meaning error is getting into the oxygen and incorrectly influencing the oxygen sensor on that bank.

[@jeffmcmillan2813]

I like all your vids....very informative...could you post something that talks to common or normal cold start valve train noise? My 03 c5 is noisy untill full warm....normal?

[@vitalirider707]

Do please video, how to add subwoofer to stock head unit bose

[@vincentgirard99]

Can you make a video for the c5 on the secondary air pump. I have a check engine light, but I replaced the secondary air pump. I'm assuming the check valve is causing the current check engine light.

[@Toys4Life]

Pull the code (s) with the C5's diagnostics in the dash. Here's how. kzbin.info/www/bejne/mKjFn617dtCjj8U

[@Ls_corvette]

This is me today probably the spark plug wire because it’s been on the header for a year now

[@e.fabian954]

Hi I have an 81 corvette C3 with an LS1 swap from a corvette C5.it has a 4L60E transmission. I used to be able to launch and the wheels would spin no problem and take off fast. Recently it has been hesitating on acceleration with no more Launch at all like as if I’m taking off on a higher gear and slowly gain speed. no more launch at all. Any ideas on what you think it could be ? I would greatly appreciate your help thank you.

[@Toys4Life]

See my other respones.

[@casualcombine]

I fought a misfire for a few weeks, turns out it was too small of a plug gap on my tr55s.

[@skipdegraff6547]

I've changed my plugs and wires and THEN discovered a misfire ... Just because it is new does not mean it is good. I put old wires on 1 at a time no difference. 1 plug at a time 2 "new" did not fire properly. Creating the misfire. Dad said if it aint broke don't fix it when he heard me complaining about 3 pm after the 6 hours of wtf in the shop

[@Toys4Life]

Absolutely happens, but it is rare.

[@aceg8458]

Wouldn’t recommend using a spark plug for testing. If weak spark is an issue this doesn’t yield best results as the plug is outside the cylinder and does not have to overcome compression to jump the gap. Best to use a spark plug tester. They’re inexpensive and look like a spark plug but account for cylinder compression

[@Toys4Life]

Thanks - I understand what you are saying and agree that would result in a better test - link to tool you are suggesting we use please!

[@richarddobreny6664]

Correction, GM LS coils are reliable, GM coils on the 3.6 DOHC motors are notoriously unreliable.

[@nunyabeeswax3061]

Have a c4 lt1 and no diagnosis is needed when it missfires.jus change the opti!!!😂😂😢😢

[@Toys4Life]

😂

[@creverett9]

lol the picture of the LS block is backwards.

[@Toys4Life]

How so?

[@creverett9]

@@Toys4Life The person who created the image labeled "front of block" when actually that's the rear. you can notice it by looking at the position of the cam sensor and thats where the rear cover goes.

[@477racing]

I hate when the female portion of the connection is too loose....

[@Toys4Life]

lol.