missing when shifting into high
Thread Starter
|
Senior User
Joined: Mar 2008
Posts: 147
Likes: 0
From: Miami Lakes, Fl
missing when shifting into high
I have a 98 F150 4x4 5.4 with an automatic. I have changed coils, plugs, and still have a miss around 35 - 40 MPR.
Can this be caused by the transmission?
Thanks
Dan
Can this be caused by the transmission?
Thanks
Dan
Post Fiend
Joined: Jan 2005
Posts: 8,402
Likes: 10
Considering what you have already done I think you have answered the question yourself. If it was me I would replace the fuel filter (if not already done), I would run a can of a good fuel injector cleaner thru it ( I like both Lucas and Cyclo). I would also consider checking to see if there are any stored error codes, Autozone and some others will do that for free. Just my opinion, maybe some of the transmission experts will differ. Good luck with it.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,698
Likes: 2,620
From: SE Florida
I doubt it's the trans, but anything is possible. Except Autozone being able to read Ford trans codes. That's not possible.
You might have torque converter shudder. A complete fluid change can often fix that. Here's how to do it yourself. One update, MERCON V is now the right fluid. MERCON has been discontinued.
https://www.ford-trucks.com/article/...nsmission.html
On my V10 I replaced all of the plugs and COPs, and still had a miss. I had a bad new COP.
You might have torque converter shudder. A complete fluid change can often fix that. Here's how to do it yourself. One update, MERCON V is now the right fluid. MERCON has been discontinued.
https://www.ford-trucks.com/article/...nsmission.html
On my V10 I replaced all of the plugs and COPs, and still had a miss. I had a bad new COP.
Thread
Thread Starter
Forum
Replies
Last Post
