1G A Bad Knock Sensor?

[SleepingTsi94]

Well I put my 680cc injectors in along with stage 3 keydiver chip and a 2g maf. Everything seem to have went smoothly. Now I have the boost gauge as a knock gauge and at time around 2800-4000 rpms it will jump all way up and the car becomes sluggish. Putting out alot of knock. Once I see the gauge move at all I let off. But it does not do it at all times. Think its bad knock? Or maybe some suggestions

 

[c4uldr0n]

Phantom knock!? Do you have noisey lifters, changed your oil recently or used a different style oil filter? Get back to us, thanks.

 

[Apeximprt2nr]

Check the knock sensor. Put your hand on it and if you feel goo coming out of it, time for a new one. Could be phantom knock but I don't think it would happen so much in that RPM just coincidently.
Seems like the chip or even the MAS could be a culprit. I've never done a 2g MAS on a 1g or used the keydiver chip so maybe someone with more knowledge could help him out with that.

 

[Dream On]

Remove the downpipe, and feel up there for your knock sensor, of go from the passenger side under the intake manifold. If it's bad, their will be the black goo leaking onto the block, and little of it left on the actual sensor itself. I would guess phantom knock as well though. Maybe you just need to tune down low a little though. Hard to say.

 

[SleepingTsi94]

Well the motor has only about 5000 since rebuild. And no noisey lifters. Car is close to another oil change so will get that done and see. Ill check for the black goo and report back to let you know. But why would the downpipe have to be removed?

 

[Dream On]

It doesn't have to, but you may find it easy to access than going under the intake manifold. It isn't in a spot that is really easy to get to. You would be able to see it unless you remove the intake manifold, only feel. As for what it feels like, it is similar to silicone gasket makes stuff, but thicker and a little harder. It was on my block when I changed my IM gasket, and it would have been hard to clean off if I would have tried.

 

[SleepingTsi94]

Well checked it and I was able to pull some off the sensor that was black. So I will replace the sensor and hope for the best. Also wheres the best place to get them at a good price? All local dealerships are looking at about 100 bucks.

 

[Dream On]

jnztuning.com or SBR had the lowest prices when I got mine. If you'd rather get a non oem one, they're cheaper at Autozone and the like.

 

[SleepingTsi94]

What are opinions on aftermarket knock sensors. Or is oem the best way to go in this case?

 

[marcmsj]

What are opinions on aftermarket knock sensors. Or is oem the best way to go in this case?

OEM all the way

 

[Dream On]

I would get an OEM personally, though one of my buddies got one from Autozone a few years back and it had a mitsu part number on it and was identical to mine.

 

[MarkAngelo05]

WOW!! I GET THE SAME EXACT THING. I ALSO JUST PUT IN THE STAGE 3 KEYDIVER CHIP w/ 650cc injectors and all supporting mods.

I'm getting those Intermittent LARGE
BURSTS OF KNOCK at partial throttle, the knock count meter keeps going up
until I release the throttle and get back on it, then its fine.. it's weird
because it starts at around 3k rpms, and will keep going up VERY QUICKLY AND
MAX OUT, until I release the throttle, and get back on it... it's around
4psi of boost aswell, so it's kind of awkward.(my wideband read 11:1 -
10.5:1 ratio) The car also runs pretty crappy when its cold, and is I
noticed that the intermittent knock at low rpms happens more often when the
engine is cold.

Did you find the answer?? I was thinking it was the knock sensor aswell... Please give us an update of what you found out.. because I'm experiencing the same exact thing.

Thanks!

Mark Padilla

 

[SleepingTsi94]

Well I replaced my knock sensor. And checked over and found some boost leaks which i fixed. Still happens just not as often. Im also experincing it more when its cold. I ordered an new o2 sensor cause old is bad. And going over for leaks again.

 

[MarkAngelo05]

wow.. so it wasn't the knock sensor then? that's very awkward.. I've checked for boost leaks numerous times, honestly don't think it would be causing that. only thing I can think of is that we're getting "rich knock" because its just pig rich through those rpms, then ecu reads the knock as lean so adds more fuel and pulls timing, thus resulting more knocking, etc.

So you car kinda runs like crap when its cold right? you hear a bit of a sputter/hesitation, but after it warms up, its perfect??!

Mark

thanks!
Mark