#2 knock sensor low voltage

[OIF1VET]

Looks like it's time to pull the intake and swap out knock sensors, threw the low voltage code again on #2...

Figure while the intake is off I should do heads too..
How do I go about determining the best heads for my application? I have no idea, am I best off just calling some reputable people who deal with heads??

Going to try and ride this out till winter, low voltage shouldn't hurt anything, just hate seeing that dam SES light on.. Had it reset today and hasn't come back on.. I also read to check the PCM pins and make sure none came loose as this could cause the problem too, so will be checking that out before I drive it again..

Anyone know of any issues that could be caused should I drive it this way till winter? I know it isn't a motor issue, def a sensor issue..

[Blue_Thunder]

IDK, but could your car run in a limp mode because one of its knock sensors in not working correclty?

[WMCCjames]

Are you getting knock counts?

[DanO]

do you have HP tuners?

I'd do a little logging to verify its not anything bad.. but sounds like a wire..

As for heads, you cant beat the L92/LS3 heads, especially for the $$... but the problem is our bore may be to small.. I think they are coming out with a smaller bore version (aftermarket) soon..

[1BADAIR]

livernois heads.
have you had the intake off? Its easy to pinch the wires. The tuner may have desensitized the sensor too

[OIF1VET]

Are you getting knock counts?

No, just low voltage

IDK, but could your car run in a limp mode because one of its knock sensors in not working correclty?

No, does not go into limp mode. At most it may knock a few degrees of timing out initially when it throws the code.. Car runs like a top, I can roast them at will..

livernois heads.
have you had the intake off? Its easy to pinch the wires. The tuner may have desensitized the sensor too

I had the intake off 1 1/2 years ago when i swapped intakes.. It could possibly be from that, just took awhile to wear through the wires.. I tried to make sure they had padding covering them when I reistalled the intake.. Tuner did not desensitize the sensors that I know of, but good question to ask.. Where do i get more info on the heads?

[1BADAIR]

I think it was the stage 3's (not R's) that just made 480? with there cam
http://www.livernoismotorsports.com/...Cylinder+Heads

[OIF1VET]

I think it was the stage 3's (not R's) that just made 480? with there cam
http://www.livernoismotorsports.com/...Cylinder+Heads

Thanks I'll check it out.. Do you see an issue with running the car with a low voltage knock sensor? I would prefer to wait till winter to pull the intake and do the heads, etc..

[1BADAIR]

normal driving shouldn't be an issue I don't think. I wouldn't beat on it though

[OIF1VET]

I think it was the stage 3's (not R's) that just made 480? with there cam
http://www.livernoismotorsports.com/...Cylinder+Heads

That's not a bad deal.. My cam is 563 lift, 563 duration, do you know what cam they were running with those heads? Would my cam be suitable for those heads, or should I just call them.. They would know for sure..

[DanO]

What were the conditions for the flow measurement for the livernois heads?

310 CFM @ ???inH20 and ???in lift? I really hate it when just a flow number gets thrown out there.. Is like saying my car does 0-60mph.. (sorry.. just a little rant)



anyhow, here are the STOCK L92/LS3 flow curves at 28"

4.030” test bore
Lift ___.100 _.150_.200_.250_.300 _.350 _.400 _.450 _.500 _.550 _.600 _.650_.700_.750
#1 Int. 74.9 109.4 154.4 193.5 225.3 252.8 274.6 292.7 308.8 321.0 328.7 326.6 310.0 316.6
#1 Exh. 63.6 97.9 126.1 148.7 162.3 178.6 189.6 197.6 205.5 210.7 214.6 217.8 221.2 223.5

[1BADAIR]

the l92 vavles are too big for an ls1. The valves will be shrouded, pistons have to be notched, have to have a new intake and 8 new rockers.
If you call them ask for rick(88saleenspeedster) or Steve(SASO aka rickety)

[OIF1VET]

The bottom seal of the knock sensor was broke so the valley cover was not sealing the sensor off from the oil.. Oil was seeping up into the sensor causing the low voltage code(whole sensor was covered in oil and there was even oil on top off the valley cover).. New sensor will be in today and should be back on the road today..

[DanO]

good deal!!

that was an easy fix