is my car even worth fixing or should i just sell it?

i have 99 maxima SE 5 speed with 140k on it

the car still runs even though the acceleration is horrible and it hesitates really bad..but will i mess it up more by driving with those problems?

please someone give me details

Do the knock sensor first and see if the o2 code goes away. They can both be done in the garage but if not try to find a regional member that could help you out. NOT worth selling the car over.

Renagade281:

If you are located near Chicago, I will change your KS for you for $50.00. PM me if you are interested.

Ted

i would fix it it was me. Well i would fix it some day. i have been driving for 8 months on bad o2's and ks and im boosted.

yeah man two sensors go bad and youre considering selling the car? thats the wrong way to go about it. pick up the sensors here on the org or elsewhere and install them yourself. not hard at all. dont wait too long but get it fixed when you can. power loss and bad gas mileage will take its toll on efficiency. it's nothing to sell a car over though.

im located in houston and would pay someone to change the knock sensor..


how much am i lookin at spending on a new knock sensor?

i got mine new on ebay for 65 shipped.

+1 for the ebay KS. It's no picnic to change but worth the effort. I could not, however change the upstream o2 sensors so that went to the garage....

The downstream sensor is a piece of cake.

Do more reading here on cleaning your TB & IAC and you'll never think about selling again...

For a '99 Max with 140K mi., I would try to fix it, unless you want a new car. KS and two O2 sensors would probably cost you between $200 - $250 (DIY).

driving on bad knock and 02 sensors wont do anything to hurt the car other than give you bad mpg and decrease power. an OEM ks can be bought on ebay for $65 and i would just go to autozone for a $50 o2 sensor. neither are really that hard to change yourself if you know where they are but atmost find someone near you to help you out. dont take it to a mechanic for something like this unless you have money to waste.

changing these sensors should help your acceleration problems. also if your car isnt worth $100 to fix, i will gladly give you $100 for your car

If you were near virginia you could make a drive here and id do it for free.. and thats what someone should do if they guy is willing to drive somewhere to your house. Show him how to do it and dont charge him anything unless you are wasting your gas... the first time i was shown how to replace a KS my mechanic did it in literally 2 minutes.

i dont know why it would be hesitating from KS and o2 sensors. poor pickup and performance is obvious, but the hesitation could be packs. either way, www.rockauto.com has 66 dollar KS in case you dont want to deal with Ebay. and you shouldnt pay anyone to do this for you. just find some girl or kid (someone with small hands/arms) to reach down under the manifold and undo/remove the bolt. that is the hardest part.

Or do like me. Wait till you change injectors so its a lil easier

Where are you finding them for $66 on RockAuto.com? On their site, I'm finding it for ~$130. See: BOSCH Part # 64621 {Knock Sensor} $139.79

With o2 and KS bad... the car is completely useless. There is no point to keep it anymore... idk why everyones telling you to keep it. I would get rid of it ASAP! Problems will only build from here, and you don't want to deal with it. Having said all that ur car is probably not even worth $500 bucks. But your lucky if you want i'll buy it off you for $750 and i'll pick it up. Concider it ur lucky day. Let me know.

haha ill give you $751

wow they must have just taken it off. i was lookin at it like 2 weeks ago when i did mine. then i guess ebay is the only way to get a KS for under 100 bux.

ebay ftw. I got mine for 65 shipped.

Me too! Is front O2 sensor that hard to change? I heard that bad O2 sensors can lead to kitty cat damage? Any reason to change them in the absense of a code? I have 192K on mine.

I found that the front O2 sensors were easier to change than the KS (my is '97). You'll need an O2 sensor socket (~$10). Bad O2 sensors lead to cat damage - may be. There is no recommended O2 change out interval in the owner manual, but at 192K miles, I think you should change them.

Replace the knock sensor, and the three O2 sensors, two in the exhaust headder and one after the Cat (I think that's where it lives). I've got a 95 with 155K miles, and if I don't get over 200K, Nissan owe's me my money back. Buy only Nissan parts, check the internet for the best deal, then buy. My $1K dollar starter motor converted me from any-ol-part will do to Nissan parts.

thats no fun...its all good tho...not a big fix...i spun a rodbearing recently so my max has been sittin in the drive way for about a month now...SIGH...time for a new motor

99's do not have rear O2 sensors, the reason I mention that is because that is what the OP has. Also, the O2 configuration depends on what spec it is (Cali/Fed)

Interesting deal there.


1k for a starter motor? i paid 125$ for a reman w/ a lifetime warranty

Other than that, everyone else has covered the important details.

How did you manage to pull that one off?

dont sell a car over sensors. haha. thats a miniscule problem compared to the overall works of the car

KS - buy on ebay
KS harness - courtesyparts (online)
i had someone on forums install it for $20.. if theyre good with extensions it should be a 30 min job

check codes. still got o2. buy oem ones. you can get them through forums for a decent price. rather than going to dealership. a shop will charge you anywhere from 30-50 replacing it.