What, if any mods do you have? How many miles? The R7 program of the Superchip gave my L some similar problems, although you've got a few extra things going on leading me to believe it's coils or the infamous intercooler leak.

 

Bone stock, , 27,000 miles.
Had the cooling hose leak right from the start, fried 3 coil packs and two plugs,
dealer replaced w/new style cooling hoses,
TSB on that one for all F150's, replaced burnt coil packs, 8 new plugs. belt is definately glazed. pullies are shiney. They topped off my intercooler last oil change haven't seen a drop in fluid level yet...When they pulled the plugs 1st time 2 electrodes totally gone!!! had some octane boost in there, almost wouldn't do under warranty! ooops!
Thanks for the replies, will check the rear coil, get the part # for the new belt a few theads back.

 

Mystic,

Manufacturer: Gates
Part #: k080660

When I did my belt swap, my stock belt was beginning to glaze. Mileage was 14,000.

hope this helps,



------------------
Brake Late, Dive Deep

Speedin Bob
'99 'Red Rocket' Lightning #2504, 6/17/99
NLOC # 438
13.56 @ 100.89, 1.97 60' on F-1's
JL Ram Air, R9 Chip,Keyless Entry, Retrax Bed Cover, Shackles, Wet Okoles, Mobil 1/FilterMag, Corners & Tails
Autophysics filter FOR SALE [9" x 3.5" Red Trim]

 

Thanks Speedn Bob. I'll replace this weekend.

 

Any help here,
last few days, have had the blower belt slip if I mat the throttle let out of it completely, I hear this awful sqweeeel!
Now when I mat the throttle, @ highway speed, it drops down a gear which is normal, but the boost immediately maxes out 1 or 2 seconds max, then drops off to about 4lbs, and starts to build again. Cough... belt slip? New plugs? I've also noticed a cruise 70mph My L runs rough, misses ever so slightly, coils bad plugs??? Anyone with similar problems.
Thankx

 

Check your intercooler fluid level.

 

Check the rear passenger side coil pack. Sometimes the heater's hose drips on that one and shorts it out. Look for even a small amount of the green fluid on it. As far as belt slippage, hmmmm, is the old one glazed or loose? Maybe time for a new on, dunno.

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Red '00 Lightning,
Power Surge Performance enhanced,
Sound effects provided by Flowmaster,
13.227@103.55

 

I have 2700+ miles on my truck and got into it a little..Only making 6 lbs. boost according to the oem guage..Any ideas ??
Thanks..

 

I've got a similar problem. Sometimes when going WOT my L will cough and sputter as if it is losing boost. Seems to happen when I jump on it from highway cruising speed, I've never noticed it from a dead stop. I don't know if it matters but I've got the R9. I've only got about 3500 miles on mine.

 

Mine runs ok,, I also have the R9, but I see people making 10 lbs. boost And I'm only making 6 max...
What could be the cause ? I also have a drop in K&N...