knock sensor in caldina gtt

Caldina3SGTE · Post by **Caldina3SGTE** » Wed May 21, 2008 11:22 pm

hey guys my caldina gtt engine check like keeps coming on plug it up to a machine thing and it says its the knock sensor,

i've been told correct me if i am wrong, it detects knocking from like the big end bearings,
any chance it could be a faulty knock sensor??
any way of find out if it is??
or could it be my big ends any way of finding out if they are

any help would be great as yea first time i've heard of a knock sensor

Bling · Post by **Bling** » Wed May 21, 2008 11:51 pm

I knock sensor detects when an engine is detonating. (not working correctly) Nothing to do with the big end bearings. It works by retarding the timing of the engine usually I think to stop the detonation.

all explained here: http://en.wikipedia.org/wiki/Engine_knocking

Detonation kills engines, so might have to get the knock sensor tested and replaced if faulty

what fuel do you run it on?

fivebob · Post by **fivebob** » Thu May 22, 2008 12:38 am

You have blown your knock sensor. These normally fail because of too much detonation, usually caused by excessive boost or poor fuel. What boost level and octane fuel are you using?

Caldina3SGTE · Post by **Caldina3SGTE** » Thu May 22, 2008 9:41 am

oh k sweet i'm using 95 only boosting 8psi cheers fellas thanks for the info kinda relieved now cheers again

barryogen · Post by **barryogen** » Thu May 22, 2008 10:16 am

Caldina3SGTE wrote:oh k sweet i'm using 95 only boosting 8psi cheers fellas thanks for the info kinda relieved now cheers again

From factory they usually do ~12-15lb, if it is only doing 8, something is up.

And use 98.

xsspeed · Post by **xsspeed** » Thu May 22, 2008 10:27 am

fivebob wrote:You have blown your knock sensor. These normally fail because of too much detonation, usually caused by excessive boost or poor fuel. What boost level and octane fuel are you using?

maybe you should upgrade to 98 or else you may have issues with excessive detonation = problems.

i would start by using 98 though

bbq1988 · Post by **bbq1988** » Thu May 22, 2008 10:31 am

barryogen wrote:
Caldina3SGTE wrote:oh k sweet i'm using 95 only boosting 8psi cheers fellas thanks for the info kinda relieved now cheers again

From factory they usually do ~12-15lb, if it is only doing 8, something is up.

And use 98.

Alot of people seem to have their caldina's around 8psi, no idea why.. somthing up with factory bleed valve?

fivebob · Post by **fivebob** » Thu May 22, 2008 11:19 am

bbq1988 wrote:
barryogen wrote:
Caldina3SGTE wrote:oh k sweet i'm using 95 only boosting 8psi cheers fellas thanks for the info kinda relieved now cheers again

From factory they usually do ~12-15lb, if it is only doing 8, something is up.

And use 98.

Alot of people seem to have their caldina's around 8psi, no idea why.. somthing up with factory bleed valve?

Sort of, the bleed valve is closed by the ECU to limit boost. This can be cause by knock sensor failure, excessive knock, low engine or intake air temp, and a few other possible reasons that put the ECU into "Low Boost" mode.

gepsk8 · Post by **gepsk8** » Thu May 22, 2008 6:42 pm

lol, fitted knock sensor on any 4wd 3sge/fe is a ass

Caldina3SGTE · Post by **Caldina3SGTE** » Fri May 23, 2008 2:25 am

na i'm running a boost controller and yea thats how low i can get it, started using 98 today still comes on but only when i give it shit but yea i think i need a tune idling a bit lumppy

fivebob · Post by **fivebob** » Fri May 23, 2008 1:01 pm

Caldina3SGTE wrote:na i'm running a boost controller and yea thats how low i can get it, started using 98 today still comes on but only when i give it sh*t but yea i think i need a tune idling a bit lumppy

It's not giving it sh*t that cause it to come on, it's when you exceed approx 50km/h for a period of time (about 5-10 secs) and the ECU does not detect a signal from the knock sensor.

It comes on because the knock sensor is broken, using 98 won't fix that. You need to check the codes to make sure it's the knock sensor (code 52), then replace it, or you will very likely do some other damage to your engine. At the very least have excessive fuel consumption because of the reduced power from the retarded ignition timing.

themaleman · Post by **themaleman** » Fri May 23, 2008 10:20 pm

my knock sensor wasnt tightned enough and used to get rattled out of the block slightly and that caused the engine check light to come on, i coudnt get a socket back there so had to tighten it regulary, but once i tightned it fully there was no problem

FXGTV · Post by **FXGTV** » Sat May 24, 2008 2:47 pm

viewtopic.php?p=632854#632854

I know its not exactly for the caldina - but its the same prinicpal

Caldina3SGTE · Post by **Caldina3SGTE** » Fri May 30, 2008 9:42 am

hey got a new knock sensor but have no idea where it goes, done a search on here but can't find anything, so if any one no where abouts it is it would be nice

Boosted_162 · Post by **Boosted_162** » Fri May 30, 2008 5:08 pm

Thats my gen 3 3SGTE. It should be under the intake manifold with a single wire coming out of it. A bitch to get to in a 4WD

Caldina3SGTE · Post by **Caldina3SGTE** » Fri May 30, 2008 6:28 pm

cheers dude will have a go at it tomorrow

HamzGTT · Post by **HamzGTT** » Sat Jun 07, 2008 6:14 pm

Thats strange about running 8psi (max) on your dina as the man say i get about 11-12psi normaly and 14 psi cold frosty mornings (good fun) but I Must say mine stays around 8psi untill full throttle running factory gear except boost guage running off bov line

Caldina3SGTE · Post by **Caldina3SGTE** » Sun Jul 27, 2008 7:27 pm

has anyone replaced a knock sensor in a caldina before?? just wanting to know how how long it took and if they found a easy way to do it

thanks in advance

fivebob · Post by **fivebob** » Sun Jul 27, 2008 7:43 pm

Allow about an hour, it can be a lot quicker than that if you get lucky, and have the right tools.

There is no easy way to do it. Something is always in the way and you will skin you knuckles, swear, want to hit things and give up several times before the job is complete :evil:

radio8tiv · Post by **radio8tiv** » Mon Jul 28, 2008 9:57 am

Alot of people seem to have their caldina's around 8psi, no idea why.. somthing up with factory bleed valve?

Sort of, the bleed valve is closed by the ECU to limit boost. This can be cause by knock sensor failure, excessive knock, low engine or intake air temp, and a few other possible reasons that put the ECU into "Low Boost" mode.

I bought my caldina not long ago and it only runs 8psi as well
is there any way to overide the ECU and make it run the higher boost
I have tested the turbo vsv valve and it works just not sure how to test
it on the vehicle to see if the ECU opens it up or not