jeronberna

Hey everyone I'm in the process of trying to solve this misfire mystery of mine, and I can't seem to figure what is causing these misfires..

I will get two identical misfires in 3/4 then in 7/8 alternating between the two sets of cylinders.

usually with the value of 229 followed my a 7 in both 2 and 6

Ive replaced the spark plugs and wires.

if I recall correctly 3/4 and 7/8 don't share a rotor or coil... so what could they have in common?

or am I looking in the wrong place?

thanks guys!!

timmy0tool

iTrader: (7)

check to make sure your have your plug wires routed correctly!

Yamae

Why you didn't mention these problems at your another post?
Those knocking and fuel trim problems with misfires make me think of an abnormal duty signal from one of timing sensors. I'd check the crank and cam sensor signals using an oscilloscope trying to find the abnormality. I also will check the teeth of timing plate to see any metal piece is attached there.

jeronberna

When you say timing plate, you mean the timing belt cover? or is there something else called a timing plate? I'll check the cam sensors and crank sensors with the 2 channel scope i have in the scanner, hopefully it will be enough to help decipher the issue.

what part would the metal pieces be originally from if there were to be any little metal pieces? shavings from something hitting a sensor? I apologize for the lack of knowledge on my part, when it comes to engine timing and all of that i am a complete klutz.

What are you thinking might be the cause of this list of issues? to reconfirm these are the issues i am currently noticing :

Misfires
P0330 and P0325 Knock Sensor fault codes
TRAC light blinking (not sure if it's blinking because its sitting on the lift, or because of the ECU, i have yet to lower the car yet.

Things i have done to try and remedy the scenario :
Replace spark plugs with new
Replace spark plug wires with new
Alternator and new battery
Replaced ECU Capacitors and 1 small ceramic capacitor in C109 slot.

Please let me know what you think! and thank you @Yamae for the help throughout all the threads, i guess they all kinda lead back to eachother huh? Thank you so much

Thank you @timmy0tool for the spark plug wire guide, i'll reconfirm that is the correct placement on the car currently.


would the TRAC light be flickering due to it being on the lift currently? i'll have to lower it and double check, but could that be a possibility? The engine is my priority, but it would be great to get that darn TRAC light to slop flickering