I have an appointment next week for a few items for the dealer to check. One thing is my engine runs rough at low rpm's. while cruising at about 40 mph or so, if I ease down on the pedal the engine acts as though it's *lugging* like in a standard shift when your in too high of a gear. (I have an auto trans) Has anyone had this problem? Any help would be greatly appreciated.

Thanks
Jim

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FASTFOURBY
98 Lariat 4X4 SC SB Tow ORP
Superchipped!
K&N
Gibson Sport Truck
Edelbrock IAS
JBA Headers
16X8 Centerline Billet Wheels 285 75 16 BFG AT's for summer Stock 17's and Goodyears for winter.

 

Di this only happen after you did your mods or have you had your mods a while and this problem just started. Let us know how it goes at the dealer.

Akula

 

See the Service Engine Light and K&N filter thread in this section. Mine started acting this way and then the light came on. The rest has been a lesson in frustration. Tell us how your dealer reacts to the mods and warranty work.


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99' F-150 XLT SC 4X4 ORP LS 4.6L K&N Air Filter Air Box Mod (3" intake from fender & silencer removed), Superchip, A.R.E. Cover, Duraliner bed liner, Rapidflow 3" single CatBack exhaust.

 

akula, Big Red 2, Thanks for your response.
I have had the headers for about 3 months, the air box mod and K&N for about 6 months. I have had my truck in twice for bad coils. when that happened the check engine light came on. It does not come on now however. This chugging, or lugging as I described, is mild compared to when the coils were bad.

Also, I have taken out the superchip and have been running 87 octane gas for about a week now to see if there was any difference. It does the same thing with or without the superchip.

Jim

------------------
FASTFOURBY
98 Lariat 4X4 SC SB Tow ORP
Superchipped!
K&N
Gibson Sport Truck
Edelbrock IAS
JBA Headers
16X8 Centerline Billet Wheels 285 75 16 BFG AT's for summer Stock 17's and Goodyears for winter.



[This message has been edited by Jim Mc (edited 12-23-1999).]

 

Jim MC

Do you have a 4.6 or 5.4 didn't see it in your signature. What mod did you do to the air box.

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99' F-150 XLT SC 4X4 ORP LS 4.6L K&N Air Filter Air Box Mod (3" intake from fender & silencer removed), Superchip, A.R.E. Cover, Duraliner bed liner, Rapidflow 3" single CatBack exhaust.

 

Read through this thread. I don't know what engine you have, but I think this solution works for both V8s. good luck!

https://www.f150online.com/f150board...ML/000676.html

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'99 Black Lightning #1212 5/12/99

 

DHFerguson,
Thank you, I read over that topic! I can't work on it today because lots of company comming over. I will check first thing tommorow. I sure hope it works for me. Again, thank you and Merry Christmas!

Jim

BTW I have 5.4 engine

------------------
FASTFOURBY
98 Lariat 4X4 SC SB Tow ORP
Superchipped!
K&N
Gibson Sport Truck
Edelbrock IAS
JBA Headers
16X8 Centerline Billet Wheels 285 75 16 BFG AT's for summer Stock 17's and Goodyears for winter.