I need help
Thread Starter
|
Junior Member
Joined: Jan 2018
Posts: 5
Likes: 0
I need help
inhad a new motor put in 30,000 miles ago for a few months the idle has been around 650 ish. Now I have slow acceleration and lag and spit and sputter at 3500 rpms and sometimes in second gear it won’t get past 4000 rpms. Fuel mileage is bad and just runs horribably it’s a 2005 f150 fx4. The 4wd shift motor is unplugged because it froze in 4L. and I just put acce coils and diamond e3 plugs in it. Please help I’m lost
Thread Starter
|
Junior Member
Joined: Jan 2018
Posts: 5
Likes: 0
inhad a new motor put in 30,000 miles ago for a few months the idle has been around 650 ish. Now I have slow acceleration and lag and spit and sputter at 3500 rpms and sometimes in second gear it won’t get past 4000 rpms. Fuel mileage is bad and just runs horribably it’s a 2005 f150 fx4. The 4wd shift motor is unplugged because it froze in 4L. and I just put acce coils and diamond e3 plugs in it. Please help I’m lost
Not a new plug I put in won’t come out I cannot get any grab on it it feels like it just spins
Senior Member
Joined: Dec 2006
Posts: 43,538
Likes: 817
From: Joplin MO
You have replies in the first thread you started on this issue.
https://www.f150online.com/forums/20...need-help.html
https://www.f150online.com/forums/20...need-help.html
Trending Topics
Thread Starter
|
Junior Member
Joined: Jan 2018
Posts: 5
Likes: 0
2005 f150 fx4 frustration
2005 f150 new plugs and coils all motor craft new fuel filter and rouch cold air. Ok my truck had absolutely no acceleration or power until I changed all the above items minus the cold air now it runs 10 times better BUT.... it still has acceleration problems at 3600+ rpms in second and third gear and I need help finding out why. It is not consistent with the lag and sputter it was every time before changing out
parts now it’s not. I need help and any advise is appreciated thank you
parts now it’s not. I need help and any advise is appreciated thank you
Technical Article Contributor
Joined: Jan 2007
Posts: 10,636
Likes: 264
From: Vernon, NY
I would ditch the cold air intake and go back to stock.
People don't realize that even cold air intakes requires a tune, because doesn't coincide with the stock A/F parameters.
Chances are this will resolve your issue.
For those that want to help, the OP has made several threads regarding the same issue with additions:
https://www.f150online.com/forums/20...need-help.html
https://www.f150online.com/forums/v8...16980-lag.html
People don't realize that even cold air intakes requires a tune, because doesn't coincide with the stock A/F parameters.
Chances are this will resolve your issue.
For those that want to help, the OP has made several threads regarding the same issue with additions:
https://www.f150online.com/forums/20...need-help.html
https://www.f150online.com/forums/v8...16980-lag.html
Senior Member
Joined: Dec 2006
Posts: 43,538
Likes: 817
From: Joplin MO
Okay. New Motorcraft plugs and coils? New fuel filter?
1. Check the FPDM for corrosion.
2. Put some Techron in the gas to clean the injectors.
3. Get rid of the "cold air" intake and put a stock system back on. The 5.4 3 valve will run excessively lean with any aftermarket intake unless you get custom tunes for the specific intake.
What else is not stock besides the intake?
By the way, please do not start another new thread. REPLY to this one.
1. Check the FPDM for corrosion.
2. Put some Techron in the gas to clean the injectors.
3. Get rid of the "cold air" intake and put a stock system back on. The 5.4 3 valve will run excessively lean with any aftermarket intake unless you get custom tunes for the specific intake.
What else is not stock besides the intake?
By the way, please do not start another new thread. REPLY to this one.
