Hi,

Just installed Meth, and retuning the car. I've been having these quick pops when I'm pulling in 3rd gear. It hiccups and I feel a slight hesitation, but it really lasts about a split second. I've attached a screenshot of a log and circled what I am talking about. Any ideas? I have new NGK IRs.

Thank You!

 

Could be plug gap needs reducing as I had a similar issue recently.

However I have also felt / seen this before if the car starts to run too lean during the pull.

Have you got a log with the wideband connected and showing the knock sum too ?

 

http://www.mediafire.com/?sharekey=5...db6fb9a8902bda
1-2 count of knock. Didnt look too lean. Thank You for looking!

 

Looks like spark blowout to me. Re-gap your plugs smaller and see if that helps.

Make sure you are logging AFR and knock. Same type of hesitation can happen if too lean or theres a problem with fuel delivery.