MisFire frustration...
Thread Starter
|
Senior User
Joined: Mar 2005
Posts: 289
Likes: 0
From: Miami, FL
MisFire frustration...
2000 Ford Ex 5.4 V8 175K miles
Top of radiator (plastic part) had small crack and started leaking on drivers side. Fixed with JB Weld. Ran fine for a day. Now I have a bad misfire and codes P0301 and P0302 (Cyl 1 and 2). Cleaned MAF and checked Air Filter. All good.
Plugs replaced at dealer less than 20K miles ago.
Help please...
**Update
So I took off Cyl 5 (easiest) and found that the boot is fine but the collar on the boot is done for. Can this cause the issue?
Top of radiator (plastic part) had small crack and started leaking on drivers side. Fixed with JB Weld. Ran fine for a day. Now I have a bad misfire and codes P0301 and P0302 (Cyl 1 and 2). Cleaned MAF and checked Air Filter. All good.
Plugs replaced at dealer less than 20K miles ago.
Help please...
**Update
So I took off Cyl 5 (easiest) and found that the boot is fine but the collar on the boot is done for. Can this cause the issue?
Senior User
Joined: Dec 2004
Posts: 451
Likes: 0
From: sw mich
Did coolant spill on the engine? On the V10 there is a nice channel between the heads and the intake manifold that allows water/debris to drop right into the spark plug holes. It happened to me while changing my thermostat. The misfire didn't start until the engine warmed up and went away after about 4 days.
Senior User
Joined: Dec 2004
Posts: 451
Likes: 0
From: sw mich
I may easily be wrong, but I think the misfire codes can be a little generic no necessarily caused by those 2 specific cylinders. That said, mine did not throw any codes.
I continued to drive mine, but the miss may not have been so bad since it didn't start until the engine warmed up. I never really figured that part out. I took the opportunity to change plugs & boots anyway
I continued to drive mine, but the miss may not have been so bad since it didn't start until the engine warmed up. I never really figured that part out. I took the opportunity to change plugs & boots anyway
New User
Joined: May 2012
Posts: 2
Likes: 0
Howdy, I have 2 Ford E350 V10's, a 1998 and a 2001. Love them. I just changed the plugs and coils on the 98 because I was tired of dropping one coil at a time. I then did the plugs on my 01 and kept it's coils since I haven't had one go bad yet. One thing though. We used White Lithium grease on the plugs and coils, not dialectic grease which had come in small packets with my new coils on the 98. Now the 01 is running ROUGH and feels like it's missing badly. Could the white lithium grease be the culprit? If so than I'll be digging in again. We hooked everything back up again properly and it's pretty much the last trouble shooting method to do. Thoughts?
Trending Topics
TreadLightly
Joined: Oct 2006
Posts: 1,608
Likes: 0
From: SE Missouri
Keep in mind that dielectric grease is NON-conductive. It is not for the metal parts, but for the rubber parts.
motopsyko32: I would move the COP's off of the misfiring cylinders to the other side and see if the misfire moves. It is about a 15 minute job that could save you $$$.
motopsyko32: I would move the COP's off of the misfiring cylinders to the other side and see if the misfire moves. It is about a 15 minute job that could save you $$$.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
Post Fiend
Joined: Mar 2009
Posts: 11,798
Likes: 14
From: Mt. Shasta California
Sounds like dirty/wet boots. Dielectric grease is fine for the boot ends and the little spring end and will conduct at long as the spring is touching the plug. I recommend a little regular grease at the end of the spring to keep it from corroding and seal the inner top part of the boots with heavy grease which could soften the boots over time but you will need new ones by then anyway. Inspect all your boots for dirt/moisture and squeeze them to inspect for cracks. If they are good you can clean them up in your sink with soap and water. I really think it is your boots and they won't throw a code either.
Post Fiend
Joined: Mar 2009
Posts: 11,798
Likes: 14
From: Mt. Shasta California
I got 8 off ebay and cleaned the 2 best ones I had. They looked like OEM and and been great for a year now. There isn't much to them, just make sure they have the springs in them.
Thread Starter
|
Senior User
Joined: Mar 2005
Posts: 289
Likes: 0
From: Miami, FL
So i changed boots on 5 and 6 and lo and behold... the misfire went away when starting up cold. After car warmed up, misfire was back. I am now going to change the remaining boots just for the heck of it ..
TreadLightly
Joined: Oct 2006
Posts: 1,608
Likes: 0
From: SE Missouri
