When my 97 lariet 4.6 auto 3.55 ls was new, it would often chirp the tires at a redlight. Now if I hit the pedal that hard, the eng. acts like it has no fuel. In a second or two it reaches 2K & takes off ok. This started with no mods. Since I have added A K&N-superchip-Bosch +4's-& latest a Poweraid.None of these changed the lag.Overall the truck runs great except for that lag. Any ideas appreciated.

 

It could be the computer has a adapted to your current driving pattern. Unhook the battery and turn your lights on to reset the computer. Then the computer will relearn your driving pattern. Just a thought.

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1999 XLT SC, bright red, 4.2l, 5 speed, MAAP stainless nerfs, Prime Designs bug deflector, Astro Euro-Lid II, Mobil 1.

 

MTUCKER
I'll try that tomorrow.Thanks for the advice.

 

did you happen to mess with the MAF sensor? OR is it dirty (such as too much oil on the K&N when you put it in) This may cause the lag you are talking about>

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97 F-150 4.6 auto, 4x2, 3.55 LS, WMS Velocity tube, K&N, Dynomax Super Turbo exhaust with Echo tube.
Oh yeah, it's Oxford White with crome wheels, Legacy shell & custom grill!

 

I don't know if this has any validity but when I replaced the brake & gas pedal on my 97 I found slack in the gas pedal linkage inside the truck at the top where the cable and linkage hook together. I took a bolt and nut and tightened them over the cable to take out the slack and it is more like instant on with the gas pedal.

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97 F-150, 2WD, Reg Cab,Flareside,Dk Toreador Red, Windsor 4.6, Magnecor 8.5mm wires, Bosch Plat +4s, 3.55 LS, EGR Bug Deflector, ******* Bed Cover, Bed Liner, XL Full Length Running Boards, Air Aid Kit, Gibson Single Out Cat Back, Superchips, TransGo Shift Kit, Hellwig Rear Sway Bar, Hellwig 2500# Overload Springs

 

Dirty injectors????

try two or three big bottles of chevron techron in a tank of chevron 93 octane. Get the techron at the chevron station not the auto parts store. It is a different formula

Chris

 

Do you have a superchip? I found that in my old ford truck the computer backed off the ign timing after 50,000 miles and the truck became doggy until the computer was replaced.

Chris

 

Thanks for the input. I reset the processor today & thrashed it 60 mi. So far no change.I'll start the other fixes tomorrow & let you know what fixes it.

 

cujet got the fix with the Techron. I put in 3 bottles I got at the store (no chevron in pa) ,filled up, & am now at 1/2 tank. Today I got a 1 ft. chirp, the first in 2 yrs. Thanks for the help.

 

It could just be your tires. Did you replace the originals? Aftermarket may have better traction. I can tell a *huge* difference in the Cobra with new/old tires. New ones hook up, no squeal. Old ones spin easily with lots of squeal. Tires get harder as they age as well. The heat from driving continues the vulcanization process and the rubber gets harder.

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2000 F150 XLT 4x4 Short Bed. Amazon Green, 5.4L, SuperCab, ORP, Tow Package, Sliding Rear Window, Electronic Shift, Keyless Entry, In-Dash CD, LT265-70-17 Tires.

 

2000 f150, The tires are 2 mo. old & stock P26570rx17 wranglers. The truck would not spin the old tires w/ 52000 on them. With 10.5" tires & LS, I'm happy with a chirp.