Another P0308 Misfire Post
Thread Starter
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Overlanding
Joined: Feb 2013
Posts: 21
Likes: 2
From: Los Angeles, CA
First picture shows the #8 plug on the left and the #6 on the right. The #8 does show some soot.
The Second picture shows the #8 on the left and you can see the electrode looks fine but I swapped them and we’ll see if the misfire moves.
Thread Starter
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Overlanding
Joined: Feb 2013
Posts: 21
Likes: 2
From: Los Angeles, CA
So after work today the SES light came on as expected, but it is still on cylinder #8. I’m at a point now that I will neeed to do a compression check and maybe a leak down test too. It’s driving me crazy since I’ve already dumped so much into this rebuild.
I also found a post about another member having misfires during SAI pump blowing and it didn’t seem to have been resolved. Does anyone know if the SAI can cause the misfire?
Thanks.
I also found a post about another member having misfires during SAI pump blowing and it didn’t seem to have been resolved. Does anyone know if the SAI can cause the misfire?
Thanks.
Recovery Vehicle
Joined: Mar 2016
Posts: 856
Likes: 154
I don't want to give any stupid advice here but I had a similar problem a year back. Nothing would fix it. Finally got pissed and just took it out on the highway and put the spurs to it for about 10 miles. Never had a misfire since.
Camel Trophy
Joined: Dec 2009
Posts: 3,883
Likes: 951
From: Charlotte
Originally Posted by Tito19
Had a misfire issue when I changed out the plugs and wires. Changed out my very expensive new plugs for the cheap OEM ones and it fixed the problem
Recovery Vehicle
Joined: Mar 2016
Posts: 856
Likes: 154
Just FYI for everybody, I was just on Rock Auto getting plugs, wires, coils, etc and they have 2 promos on spark plugs. The Autolite Iridium and they AC Delco double platinum for about $4.20 apiece with a $3 per plug mail in rebate.
Just sayin.
Just sayin.
Thread Starter
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Overlanding
Joined: Feb 2013
Posts: 21
Likes: 2
From: Los Angeles, CA
Update:
Misfire is still on 8 at start up so I continued to drive the car and on Friday I got misfires on both cylinder 7 and 4 consistently. I think that’s because I used cheap coil packs I had laying around. So I made an order for the oem Bosch units and they are on their way. Also ordered new Magnecor wires and Bosch platinum +4 since I know these work well.
On another note I did a compression test and got 155psi on all cylinders seems to be very even. And the truck is all apart awaiting those parts. I also hooked up a vacuum pump and tested the SAI valves and they seem to work. I’ll update once the truck is back together.
Misfire is still on 8 at start up so I continued to drive the car and on Friday I got misfires on both cylinder 7 and 4 consistently. I think that’s because I used cheap coil packs I had laying around. So I made an order for the oem Bosch units and they are on their way. Also ordered new Magnecor wires and Bosch platinum +4 since I know these work well.
On another note I did a compression test and got 155psi on all cylinders seems to be very even. And the truck is all apart awaiting those parts. I also hooked up a vacuum pump and tested the SAI valves and they seem to work. I’ll update once the truck is back together.
