Need Help with misfire
10-14-2007, 05:34 PM
#1
TECH Veteran
Thread Starter
iTrader: (10)
Join Date: May 2006
Location: Bay Area, CA (Pittsburg)
Posts: 4,240
Likes: 0
Received 2 Likes
on
2 Posts
Need Help with misfire My car is throwing a p0306 which is a cylinder 6 misfire. The car starts and idles fine but it barely holds idle when i try to drive it. It starts to miss really bad. I checked the plug wire and it was on good so i dont know what the problem is!
Can anybody tell me what else i can check?
Can anybody tell me what else i can check?
10-14-2007, 10:49 PM
#4
TECH Regular
clear the code, swap the plug with #4 and the wire with #2. If the code comes back p0304 or p0302 you know if it's the plug or wire. If it's still #6, swap the injector with another cylinder. If it's still #6, compression test. I bet you'll find that it's just a spark plug or wire though.
10-14-2007, 11:34 PM
#5
TECH Veteran
Thread Starter
iTrader: (10)
Join Date: May 2006
Location: Bay Area, CA (Pittsburg)
Posts: 4,240
Likes: 0
Received 2 Likes
on
2 Posts
clear the code, swap the plug with #4 and the wire with #2. If the code comes back p0304 or p0302 you know if it's the plug or wire. If it's still #6, swap the injector with another cylinder. If it's still #6, compression test. I bet you'll find that it's just a spark plug or wire though.
10-15-2007, 08:39 PM
#6
Oh buddy,
I had a misfire on 6 for a while some time ago, and after messing with all the electrical components (coilpack/wires/plugs/injectors), I ended up taking my valve covers off and saw that I broke a pushrod on the intake valve in cylinder 6. So i replaced it and a little while later it misfired again on that side and again broke a pushrod.
Wasnt until now that I swapped out my heads/cam I saw all the damage the pushrod did... check these out
1. Broken pushrod
2. Broken lifter guide
3. Hollowed out the lifter
I'm sure if I attacked the problem and not driven around with the broken push rod the damage wouldn't have gotten this far...
So, if the electrical moving around doesn't do you justice, please just take that darn valve cover off and check out to make sure the pushrods are tight and ok. Its really easy to do and I'm no experienced mechanic.
Let us know how it pans out!
I had a misfire on 6 for a while some time ago, and after messing with all the electrical components (coilpack/wires/plugs/injectors), I ended up taking my valve covers off and saw that I broke a pushrod on the intake valve in cylinder 6. So i replaced it and a little while later it misfired again on that side and again broke a pushrod.
Wasnt until now that I swapped out my heads/cam I saw all the damage the pushrod did... check these out
1. Broken pushrod
2. Broken lifter guide
3. Hollowed out the lifter
I'm sure if I attacked the problem and not driven around with the broken push rod the damage wouldn't have gotten this far...
So, if the electrical moving around doesn't do you justice, please just take that darn valve cover off and check out to make sure the pushrods are tight and ok. Its really easy to do and I'm no experienced mechanic.
Let us know how it pans out!
10-15-2007, 10:18 PM
#7
TECH Veteran
Thread Starter
iTrader: (10)
Join Date: May 2006
Location: Bay Area, CA (Pittsburg)
Posts: 4,240
Likes: 0
Received 2 Likes
on
2 Posts
Dimitry, i hope it isn't as bad as your problem. Today i moved the plug and wire around and cleared the code. So far the car is running normal. I drove it around the neighborhood. When something is wrong with the car i never drive it so it shouldn't get damaged like yours. Im going to drive it around tomorrow and see how it does. So far the code has not came back
