- #128 of 191
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Re: cleaned mass air sensor to help mpg [moquelvog]
by xtierra
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Sep 16, 2008 (2:11 pm)
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Replying to: moquelvog (Sep 11, 2008 7:34 am)
i went into googled and typed video- how to clean your mass air sensor. you should know that i used q-tips and they did leave some strands inside the tiny hole, had to use some tweesers to get those little strands out. i am in mexico so i dont have access to the special cleaner but will say that its better to use the mass cleaner to avoid any problems. use latex gloves since you dont want to place your hand oils on the shinny metal plate....once you take off the sensor, you will be able to see the layer of dirt on the module and specially on the small opening on the side that houses the sensors. i am not a mechanic but i would say that its a good idea to do this procedure in the morning when the engine is completely cold just as a precaussion..... you dont want to spray anything into an electrical part that is warm or hot. also read that it should be done every 6 months and it does effect your mpg when its dirty.
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- #130 of 191
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Nissan Xterra Maintainence repair...HELP!!
by socrpio1
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Sep 18, 2008 (8:02 am)
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I have a 2002 Nisssan Xterra 4 cyl with about 167,ooo miles on it..my check engine light came on so i took it to auto zone to get it read..the codes i was given were P0740 and P0328,,,when i took it to a mechanic he told me that my knock sensor need to be replaced and my tork converter valve in the transmission need to be replaced...when i looked up the p0740 code that says P0740 TCC Solenoid/Circuit ..is that the same thing?? and another mechanic told me to fix the transmissin valve first which will make the knock sensor problem go away..is that true?? what should i do since i am getting different answers from every mechanic...
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- #131 of 191
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Re: Nissan Xterra Maintainence repair...HELP!! [socrpio1]
by xtierra
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Sep 18, 2008 (10:52 pm)
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Replying to: socrpio1 (Sep 18, 2008 8:02 am)
i am not a mechanic but i would begin with the basics... here is what i found on the web----- P0740 code.. I been reading the site and either your able to drive sluggishly or your unable to shift... With my situation my driving and shifting was optimal. I tried to reset the engine light with my CarChip but was unsuccessful. So I dropped the Transmission Pan which had a lot of metal shavings and a clogged filter.. Cleaned it up, put in a new filter, clean magnet, along with a half quart of Trans X (a transmission fluid conditioner for seals and cleaning). Added 4 quarts of Trans Fluid.. I put my Davis CarChip back in the car to drive it with new filter and fluid.. The car is now codeless... Hope this helps someone in the future...---- so the main question is when was the last time you had your tranny fluid changed/flushed.... this might be the cause..... as for the other code.... someone said they went over a puddle and the light came on..... they believed that water was sucked into the air intake area and touched the mass sensor causing the service engine light to come on.... just some thoughts..
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- #132 of 191
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Re: Nissan Xterra Maintainence repair...HELP!! [socrpio1]
by xtierra
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Sep 18, 2008 (11:02 pm)
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Replying to: socrpio1 (Sep 18, 2008 8:02 am)
here is another thing i found on the web....I changed the solenoid, the fluid was dark brown but did not smell burned, I saw a little bit of glitter in the pan and on the solenoid but nothing major. My issue now is that the tranny seems to shift fine but the check engine light came up again, checked the code  autozone and it is p0740 tcc circuit. It comes on as soon as I start the car, I dont even have to put it in D. What else can I be missing, I doubt it is the fluid level because if it was low there would be a delay in shifting into gears--- so i am guessing that its due to the tranny fluid needing to be changed and the filter cleaned.... remember that some mechanics will simply want to tell you that its something more serious in the tranny just to charge you more for working on the tranny... good luck .. you might want to post your problem on an xterra club website under the mechanics forums..
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- #133 of 191
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Re: Xterra Engine Power Loss [moquelvog]
by monkey2010
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Oct 10, 2008 (8:01 pm)
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Replying to: moquelvog (Jun 16, 2008 6:27 am)
I dont know about the struggling at stop signs part, but the easiest way to increase mpg and horsepower is to get more air in and more exhaust out.
I'd put an aftermarket "cold air" intake kit on it. This will let the engine breath better. If you dont care about noise, you can put an aftermarket muffler on it. You'll probably gain 10hp and about 4 miles to the gallon.
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- #134 of 191
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Re: Xterra Engine Power Loss [monkey2010]
by Boris2
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Oct 11, 2008 (2:36 pm)
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Replying to: monkey2010 (Oct 10, 2008 8:01 pm)
Did you actually try it? I use K&N Air Filter and there is a slight performance boost. I didn't notice it as much as I did when i used it on my Rodeo, but the engine is just a tad smoother.
However, this kit (Cold Air intake) costs about $300 and I am just trying to research if it worth the price
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- #135 of 191
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Re: Xterra Engine Power Loss [Boris2]
by antb
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Oct 12, 2008 (6:06 pm)
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Replying to: Boris2 (Oct 11, 2008 2:36 pm)
Have you tried the process of cleaning the MAF sensor? This may increase your over all performance. As for the Cold Air intake, be aware that not all cold air kits are equal. If they look cheap in the picture, then that may be the reality. http://www.courtesyparts.com/ this website will sell you the NISMO unit which may be the best buy, but if you can get a copy of the install directions to see where you get the air from, then you can make an informed decision based on that. You want ideally to get the air from outside the engine compartment and some kits are designed to do that.
Did you have any luck with the cabin filters? The owner's manual was pretty clear on how to handle the transfer of the filters. But never as you know asume that it will take 10 minutes.
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- #136 of 191
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Re: Xterra Engine Power Loss [antb]
by Boris2
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Oct 13, 2008 (6:37 am)
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Replying to: antb (Oct 12, 2008 6:06 pm)
I don't really have any performance complaints at the moment. The truck has only 20K miles and i put K&N Air filter in when i had to replace the original one. Didn't see much difference but i think the engine sounded just a little smoother (while could be a little louder).
As far as Cold air kits - i was looking at K&N Parts as well - i trust their quality - used their air filters for 7 years now.
Cabin filters - yeah, thanks for checking! It was a 10 min process... I don't think i even needed a screwdriver. Not quite sure why everybody wants $100+ to replace those. The filters may have been a bit chepaer, but i think i paid somewhere around $30 for a set of two (and the truck takes two).
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- #137 of 191
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Oil filters
by Boris2
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Oct 29, 2008 (7:04 am)
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Is there a benefit in using Nissan oil filters vs. Firestone brand? Dealers lately want way too much for an oil change and Firestone seem to be doing a good job for 1/3 of the price.
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