Replacing Knock Sensors Code PO325

[96'er]

I had my '96 Q ECU tested with the ODBII and it threw the KS code for bank 1. Is bank 1 located closest to the firewall and if the KS is bad, should both KS's be replaced? Where is the other KS located? and who has the best price for OEM KS's? the best price I have found is $139.00 each.

Thanks.

[3Q Jay]

DON't BUY BROWN BOX! sorry for shouting, but let there be no misunderstanding.

you will want to replace both at the same time, since the labor is the same.do ALL your underplenum hoses, too, check for any marginal injectors. this road is covered quite frequently, and it's most cost effective to do it all at once.

most of us here are partial to IoS, and that is your safest bet.there are some geniu=ne nissan advertised on the bay for $68 each shipped. i can't tell you that they are A-grade, and not B-grade, however.if you have access to a storage o-scope or chart recorder, you could hook up the sensors, and do the bench slap test and get a pretty good idea.

[96'er]

What is brown box and IoS?

Thanks.

[3Q Jay]

brown box is what is often quoted as OEM supplier, but is NOT genuine nissan.IoS=Infiniti of Scottsdale. 1-888-216-5328.

[96'er]

Ok, thats good.

My other question was where is the 2nd KS located on the engine? One is located near the firewall, the other is located where?

Thanks.

[qship96]

none are by firewall one is by left bank,one by right bank of cylinders-plenum must be removed to access both,and harness and all hoses under plenum done at same time-aprox 2000-2500 for parts & labor

[qsiguy]

...Or about $600-800 parts only if you can do it yourself. Wes has a decent write up on the project on q45.org. Injectors will be extra if you need them. I'll be doing valve cover gaskets, fuel filter, and spark plugs when I do mine. Oh ya, and adding an oil return fitting to the passenger valve cover and a methanol injector near the throttle body...but I'm sure you won't need those last two.

[Q45tech]

Plenum removal is a 4-5-6-7 hour job plus parts changing KS+ harness and all hoses won't be $700 + $600 by an experienced technican.

[maxnix]

changing KS+ harness

Don't forget the harness and seriously consider valve cover gaskets and sparkplugs.

[qship96]

Plenum removal is a 4-5-6-7 hour job plus parts changing KS+ harness and all hoses won't be $700 + $600 by an experienced technican.

Say what? Ks + harness + all hoses wont be $700 ? Try $ 855 plus shipping from Joe,and add to that the PCV valve,AAC and throttle body gaskets- find me a qualified shop and tech who will do this job for 4 hours pay....T3 certainly did not.

[Q45tech]

You can buy parts for less but Joe is very good compared to typical dealer MSRP. Ebay has [what appear to be new] Knock Sensors for $80-$75 each, the harness must come from Joe/dealer. Common things for employees to walk out with from parts or just overstocks from stores etc. since KS are standard 1990-2000 all Nissan engines.

What a shop charges has little relation to the actual stopwatch time a job takes by an expert. Everyone including T3 use the published shop times to create an Industry Standard.

Kind of like Nissan Warranty paid hours [impossible by most] and Customer Paid hours [90% of shop techs can accomplish in that time]. Techs MUST be given a blend of both types of work to make 40 hours pay in 40 hours of work.

Mitchell Labor time guide is a good standard: for an explanation seehttp://www.womanmotorist.com/i...=viewChiltons ... m/...D=CHM

Once you spend 15 years doing plenums weekly and spend $30,000 of your money on personal tools and have everything imaginable at your finger tips you can do the job [KS and underplenum hose job] in 4-5 hours continuous no bathroom breaks. The typical young dealer technican might do it in 6-7 real hours because it is rare for old Q to see dealers so they have no weekly practice.

At T3 we always suggest you get a quote from a local dealer first, that way you see how efficient we are and how inefficient they are for the same job.

[qship96]

As the customer,who cares how fast you do the job....you are still charging the customer book hours,and again,not even T3 would do the job for less than book billed hours,which is way above your original post beginning at 4 hours.......

[maxnix]

As the customer,who cares how fast you do the job....you are still charging the customer book hours,and again,not even T3 would do the job for less than book billed hours,which is way above your original post beginning at 4 hours.......

I think perhaps to what Dennis was alluding is that T-3 had an all day labor rate where actual hours were charged. Don't know if this is still true.

[Q45tech]

The all day rate no longer exists as Byron has gotten so good that he routinely does 14-15 Mitchell Hours [on Q] in his normal 8.5 hour day. That has let us maintain our low $85 per hour rate [$99 with customer supplied parts].

Now if you are having a major overhaul say 25 -30 hours work that can probably be negotiated some with TY in Advance.

One of our techs went to Lexus to reduce his commute from 40 miles to 3.Gas prices when you drive a Q in traffic.