my i30t when i step on gas and goes pass 4k rpm, it seems like the car lose powe

[paluli]

please any body have any idea?

[fiveliterbeater]

what year is your I30?

[paluli]

is a 2000 with 99k miles, when I'm driving below 4k RPM runs and shift fine, but if i want to pass a car and step on gas thats when happen. help

[G450rep]

Sounds like a bad MAF sensor. Don't wast your time cleaning it, this is a known issue on the 2000 I30/I30t/Maxima and similar years. Symptoms are no power above 3000-4000 rpm and strange shifting among other things. If you search, you will find more info on this. I have a 2000 I30t and replaced the MAF about a year ago. It was like driving a new car again. Call the guys at Pinnacle Nissan/Infinity in Scottsdale AZ. If I remember, I think I paid around $100 shipped. The dealer part has come way down in price over the last 3 years or so, most likely due to the number of units being replaced, so IMHO, replace with the OEM part. The replacement will include the air tube. It should have a green sticker on top (this identifies the latest mod status). Very easy replacement. It is recommended that you get the ECU flashed at the dealer after replacement for optimum performance.

[G450rep]

One more thing to add. You would think that a code generated from the ECU would tell you the MAF is at fault, but it doesn't. You may or may not get an SES light. I think mine generated a code to replace the forward cat conv. I'm glad I didn't at the tune of somerewhere in the neighborhood of $750 because once I replaced the MAF, that code never came back.

[paluli]

thank you for your info. i'm going to get on it and fix it.

[fiveliterbeater]

is a 2000 with 99k miles, when I'm driving below 4k RPM runs and shift fine, but if i want to pass a car and step on gas thats when happen. help

instead of blowing your money on a MAF; why don't you check your ECU for codes first. that is a basic indicator of a possible bad knock sensor or something else. alot of people forget that.

[paluli]

thanks for your advice, but another mechanic told me the same thing, i change the MAF and it was like driving a new car againg