sparks11

well I'm done with the knock sensors replacement on my 93 es300
but light came on again..............

I had a spare ecm and tried it with the same results....

but my wife just drive the car to the local store and cel went off

it is possible that ecm kind of delayed of knowing that the sensors are ok????

I'm rookie on this matter...adn any input is great aprecciated!!

ASG14

iTrader: (1)

No, it would be an instant reading. Where did you get the new knock sensors? What brand? Are you sure you hooked the wires back up?

sparks11

got it at the local junk yard..and yes I put the wires back together (same ones)
got it from a 92 es.... before I installed it I tested it in came out fine

ASG14

iTrader: (1)

How did you end up testing it?

You replaced both of them?

sparks11

replaced both of them (used ones) I got the codes from counting the blinks on the cel... when I started the repairs got 61.52.55.... 61 was a speed sensor wich I replaced and tested again and 61 code was gone...now replaced sensors and 55 is gone but still get 52.... ??? I messed up should have replaced the wires(did some reading on this forum) and got the sensors new not used..
but cel is off now and tha's kind of weird

Gerson

iTrader: (1)

Make sure its off. I bought new harness for the knock sensors new from Toyota for $25. Save me some headaches when I was doing valve covers, intake manifold gaskets, NGK plugs and wires, and used pair of knock sensors from a 86k mile Camry 3VZ engine. No DTC's came back.

llcoolpass

are the knock sensors a known, high frequency failure item on higher mileage 3vz-fe? or what is the brief synopsis on them for the 3vz-fe / other es 300 engines? I am getting the feeling it's common problem ...

sparks11

cel is off and then on again..almost sure that sensor are ok but I messed up on the wires...well I'll save some bucks and buy sensors and wires from dealer..I do not want to go wrong next time I do the job

03 ES

ive seen many 1mz/3vz engines with knock sensor issues...theyre way too sensitive and can cause the timing to retard/check engine light to come on
did you check the wiring? ive seen the wires fray and break on some 92-93 3VZ camrys...

sparks11

wires looked ok to me but I feel I should replaced them but I have little experience with cars and overlooked that, too late I realized my mistake..good thing is that next time I know exactly what to do and the job will take me 4 hours the most...first time took me about 5 hours to removed the intake and another 5 to put it together (but I installed valve cover gaskets new intake gaskets and new plugs too)

llcoolpass

yeah 2 hrs is the normal time to remove the upper intake, so you must have been taking your time, which is a good thing when you're doing it your first time.

some people pull the thing off within 30 minutes, which scares me how fast

mmatheny

Especially on older cars - the rubber hoses and plastic parts crystalize and are ripe for breaking.

sparks11

aja! had to replace/cut a few hoses that cracked when I was pulling them out/in
not a big deal but had to be really careful not only with the hoses but any plastic/wire/rubber thing on the car..ws so afraid to break one of those hard to find or expensive shaped hoses or even worse a sensor..but had a good experience doing that and I'm more confident for the very soon next time when I finally install new ks and wires.. thanks to all for the advises and suggestions,without you never would have done it

llcoolpass

aha! you speak spanish and english, very cool, glad you got it fixed

sparks11

I speak english a little not much but I know how to read it very well..and I have not fixed the car yet I was just quotering mike and was thanking all of you for your support to encorauge me to do the job tearing apart the intake when I never did it before (saved about $900 bucks doing it myself even tough it did not work)

called my local lexus dealer (coliseum oakland ca) and each sensor is $192 a piece and each wire is $56.82...something around $546 tax included...

that's a lot of money for me..I'm positive the sensors that installed are fine I tested them before...wires are the problem...when I moved the wires form outside sometimes the cel goes off and then when I drive the car a few miles and a couple bumps cel is on again...

I think since I do not have to much money and won't soon...I'm just going to open it again and install new wires and still I will have to spend about $125
its' a try I think I'm going to have to do... will buy the wires tomorrow and if have time at least I will open it in the evening to finish saturday noon or evening and I will keep my fingers crossed that this time it will work