There are times when driving our car I can feel a difference in power...not sure I'm describing this where anyone can understand... especially if I don't give it as much gas...don't know where to start on troubleshooting this one. Almost acts like some plugs are not firing correctly...

Car starts fine; lights off almost instantly.

 

pull the codes and post them up

 

No odes... First thing I checked for...see if any come up when we go to the office...

 

Didn't get a chance to get any codes today, but I did notice that annoying voltage drop...Torque tells me that the voltage from the alternator dropped from 12.9 to 12.5V...

 

Finally got a code...P0305...Cylinder #5 misfire...

 

So your first guess was right!

 

Pretty good, huh! Now to figure where it's coming from...I was going to try the fuel filter first...

 

Thoughts on swapping around the coil packs to see if misfire follows?

 

Sir, that was part of my plan...I went back out to double-check the code with Torque, and the car seemed to run fine...didn't drive it, but it started up right away. Think I should do that before I spend the money on the fuel filter, even though I can't vouch for it's condition?

 

Well the swap is free to do. But at 120k I wouldn't just forget about the filter. Like me (110k) your about due..

Note: make SURE you get a quality one like Needswings sells! Others have purchased off brands and traced back to a problem with the pressure regulators in them...

 

Here is a good write-up on the P0305 code :

OBD II Code P0305

 

Thanks for the info, sir!

 

There's not any real way to put the fuel filter in backward, is there? I installed mine (without noting how the old one was) with the arrows pointing to the passenger side of the car...

 

Check against this..

 

I've got that diagram, but I wasn't able to make heads or tails of it...on another note, the filter I got from AZ was a Mann filter...I was surprised!

 

Decided I've waited long enough.. 113k and trip this fall. I looked at Autozone online and didn't see a Mann filter listed.. so just went this route. Edit: With Torque Pro I've notice long term fuel trims run along 4.5 to 7.2.. curious to see if this changes.

http://www.ebay.com/itm/MANN-FILTER-WK-720-Fuel-Filter-/261050980078?pt=Motors_Car_Truck_Parts_Accessories&fits=Model%3ACrossfire&hash=item3cc7d9d6ee&vxp=mtr

 

I'm at 94,000 - I better order one, too.

 

It's not listed as a Mann filter...comes in their house brand...39.99...

 

What do yo mean? I see a Mann filter and part number.

 

I guess I was lucky...the box I got, labelled "FF868DL" and with their 'Everlast" (?) brand contained a Mann filter...