Home
What's new
Latest activity
Authors
Store
Latest reviews
Search products
Forums
New posts
Search forums
What's new
New posts
New listings
New products
New profile posts
Latest activity
Members
Current visitors
New profile posts
Search profile posts
Log in
Register
Cart
Cart
Loading…
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Search titles only
By:
Menu
Log in
Register
Navigation
Install the app
Install
More options
Change style
Contact us
Close Menu
Forums
Cobra Forums
The Terminator
Engine/Tuning
Electrical Issue, Misfire and P0355 Code
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="ninety5fiveoh" data-source="post: 15593341" data-attributes="member: 37012"><p>Long story short I've been looking for a coolant leak on the back of the pass side head which led me to do a compression and leakdown test as I cautiously suspected a possible lifted head; tests were fine. After completing these tests a few weeks ago, I didn't start the car afterwards or move it, until yesterday. I put the coilpacks and throttle body assembly back together to take the car for a rip, and now I have a CEL p0355 which is for a cyl 5 misfire.</p><p></p><p>So far I've swapped coilpacks around, which changed nothing. I tried a new coilpack in cyl 5, which did nothing. I tested every positive wire on each coil pack clip for 12v which was normal on every cylinder (11.5v with key on at each). I also tried resetting the computer. The plug on cyl 5 was ever so slightly damp, but nothing alarming. My wideband is also pegged at 22.6:1. I have learned that this wideband is pretty poor, but it has never been pegged like this before.</p><p></p><p>Symptoms include the CEL, as well as a severe cutting out somewhere around the 2500-2700 rpm range. The car was running flawless before the compression and leakdown tests, so I'm not sure what has changed.</p><p></p><p>I was with some buddies today and one of them suggested possible alternator failure? I replaced it with a rebuilt unit when I put the motor in last year for what it's worth, and maybe put 500 miles on it. Just more food for thought maybe.</p><p></p><p>If anyone has any more suggestions of things to check out, or similar experiences, that would be excellent!</p><p></p><p>EDIT UPDATE: Borrowed a spark tester from a buddy and cly 5 is not getting spark, but is still getting 12v. That means the ground side isn't getting triggered. Thoughts?</p></blockquote><p></p>
[QUOTE="ninety5fiveoh, post: 15593341, member: 37012"] Long story short I've been looking for a coolant leak on the back of the pass side head which led me to do a compression and leakdown test as I cautiously suspected a possible lifted head; tests were fine. After completing these tests a few weeks ago, I didn't start the car afterwards or move it, until yesterday. I put the coilpacks and throttle body assembly back together to take the car for a rip, and now I have a CEL p0355 which is for a cyl 5 misfire. So far I've swapped coilpacks around, which changed nothing. I tried a new coilpack in cyl 5, which did nothing. I tested every positive wire on each coil pack clip for 12v which was normal on every cylinder (11.5v with key on at each). I also tried resetting the computer. The plug on cyl 5 was ever so slightly damp, but nothing alarming. My wideband is also pegged at 22.6:1. I have learned that this wideband is pretty poor, but it has never been pegged like this before. Symptoms include the CEL, as well as a severe cutting out somewhere around the 2500-2700 rpm range. The car was running flawless before the compression and leakdown tests, so I'm not sure what has changed. I was with some buddies today and one of them suggested possible alternator failure? I replaced it with a rebuilt unit when I put the motor in last year for what it's worth, and maybe put 500 miles on it. Just more food for thought maybe. If anyone has any more suggestions of things to check out, or similar experiences, that would be excellent! EDIT UPDATE: Borrowed a spark tester from a buddy and cly 5 is not getting spark, but is still getting 12v. That means the ground side isn't getting triggered. Thoughts? [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Cobra Forums
The Terminator
Engine/Tuning
Electrical Issue, Misfire and P0355 Code
Top