As I've found out in tuning my own.. there are a lot of little things that ford didn't address.

Rich

 

Fair enough. I suppose that an over oiled filter could gunk up the MAF wires. I believe this even happened to me on my Lightning once.

I guess for me.. to just throw rocks at or completely dismiss a product like the oiled K&N filters based on a small issue.. is like throwing the baby out with the bath water. Yes it has it's faults and short comings. But if understood and maintained properly it can also be a great product that frees up a few ponies.

btw, when I've monitored my MAF voltages I get no spikes at all. It's been about 20k miles since I've sprayed it down with cleaner too.
I reckon if someone was to never clean thiers.. they could have that problem.

Oh and btw2, I suspect the surging could be the PCM reading a flexuating "load". As load goes up / down.. the timing and fuel will very quickly jump around. That could explain why a fella might get a surge feeling.. and not throw a CEL.
Not having the tools you have.. I'd monitor timing when this is occuring.

Rich

 

ok so after driving my truck it seams it does it at all the shift points when i needs to downshift and its almost like a miss adjusted kickdown cable (i know i don't have one) or the torque converter dosent un lock until i let off the gas completely and re apply it. I had my transmission rebuilt in aug. of 06 and it had a new EPC solenoid along with new bands, planetary and torque converter. do you think it could still be that my air filter is causing it i do have a cone filter and not a drop in one or maybe a bad MAF.
like i said before its a 97 and i do have a x cal2 with 89 mpg tune if that helps
thanks

 

im not hating on all k&n filters rich, i had one on my 1991 s-10 and my 1996 f-150. i refused to run one in my 7.3 powerstroke because i didnt feel that it filtered the air enough to be used on my $1700 turbo, but i just dont like them in SOHC/5R55 combination's, i think the symptoms i saw are rare, now that alot of others did not have this problem, next time i work on a k&n vehicle, ill look at the timing when i road test it