Just got tuned recently at rre. when i go from 60mph to 70mph in 6th gear my cel flashes like 4-5 times. i ask my tuner and he said it was no big deal. should i be worry? is it a misfire?

 

Tuner enabled the CEL to flash when the car detects knock. You need to log the car a couple counts I wouldn't worry about but more than that in a high gear high load situation I would.

Log the car.

Fast blink or slow blink from the CEL???

 

Doesn't it also mean possiblility of damaging the cat? Too much fuel from a misfire. One of those emissions related things?

 

I would go back and have them fix the tune, it should not be knocking especially if you were just tuned. The knock light is there to let you know that you should let off the throttle to avoid damage.

 

its gonna be like a month before i go back to socal. it flashes slow.

 

you should not go back to the same place if your tuner told you that the engine knocking is fine

 

You would need to open your rom to see what the Slow Flash on Knock Threshold is set to.

 

I would try another tuner (either in the Bay Area or an online tuner) since you're getting knock when going highway speeds in 6th gear.

 

if its flashes like turn signal speed no biggy,if faster it's knock.

 

Fast and slow flash are both knock

 

Yeah but faster flash is where you should take it easy

 

Slow flash is still an indication of more knock than you want. The count required for slow flash would probably be set for 3-5/6 counts, more than I would consider OK.

 

yep.. its knock. You don't happen to have any exhaust parts vibrating or anything do you?

 

No i install a megan dp last week everything seem fine except when i used the megan dp spring bolts. rattled when i idle but now have the stock spring bolts on. rattle pretty much gone.

 

I wonder if it's just running lean and all timed up. I bet that's what happened. All that to give your the illusion of much more power after the tune.