Engine going flat between 3-5k rpm

[Brad Roberts]

Fuel pump.

I would suggest having a volume test done on the car if this power issue continues. Your cleaner may have freed up the pump temporarily.

I have seen this 2-3 times this year on mid to high mileage cars.

The K+N stuff is myth. I sat with the independant 3rd party firm who tested ALL the filters. You can dunk the MAF in oil...

Bottom line: The dealers dont want to warranty the MAF. There is a VERY large lawsuit against the dealers from K+N right now.. and K+N will win.

Now.. if you want to chat about the "air boxes" available and how they can run up against the threshold for MAF failure...LOL


B

[oversteerdawg]

I had a similar issue with a comical ending. The car was idling at 1200 RPM, the ce light was on, and i had a big flat spot from 3-4k. Also, I had a lot of part throttle hesitation/surging. Turns out the celophane from a cigarette box somehow got past the filter and was blocking the maf. I think when it was last serviced it may have fallen in without anyone seeing it. Worth taking a look if you just had your car serviced.

[johne4]

Saw that my original post resurfaced, car is running great, took several long road trips since post, odometer shows 68,000 now, yikes. The only problem I had was when I spent a couple of week in Missourri, for whatever reason the highest octane I could find was 91, a bottle of octane boost help. I have been sticking to one gas company, Sonoco, they have 93 octane down here and the car runs great.

John

[Adam]

Originally Posted by Brad Roberts

Fuel pump.

I would suggest having a volume test done on the car if this power issue continues. Your cleaner may have freed up the pump temporarily.

I have seen this 2-3 times this year on mid to high mileage cars.

The K+N stuff is myth. I sat with the independant 3rd party firm who tested ALL the filters. You can dunk the MAF in oil...

Bottom line: The dealers dont want to warranty the MAF. There is a VERY large lawsuit against the dealers from K+N right now.. and K+N will win.

Now.. if you want to chat about the "air boxes" available and how they can run up against the threshold for MAF failure...LOL


B

"Dunk" the maf in oil and it will still run properly? Gimme a break. Oil on the maf will not allow it to properly interpret air flow. Oil and contaminates on the maf will compromise the system.

[johne4]

Since the air box subject as come up, what about it?

As anyone tried one?

I see one in the ******************************************** porsche catalog for about $380, seems to appear to be a alternative to desnorkeling.

Thoughts, comments, experiences.

Thanks