Knock Sensor Question

[webadict]

Hey all, long time lurker and first time poster here. I am needing assistance with a knock sensor issue, and I am hoping that someone here can help me out. I have a 2006 Buick Rainier that came with a 5.3 LH6 wi5h DOD. Well, the day after I bought her, she threw a rod. After some reasearch, I found that that year, the LH6 came with a 24 tooth reluctor. Not thinking about anything else, I dropped in a 5.3 from a 2005 Envoy I had, keeping the original pcm, and when it came time to hook up the knock sensors, I realized my horse had gotten in front of my cart. I passed that up and finished the install, transfering the intake, fuel rails, and throttle body to the replacement. After all was said and done, the truck fired and ran smoothly, getting to temp without throwing a code. When I restarted it, the engine light came on, revealing limp mode and no signal from the knock sensors. My question is this. Is there any way to wire up the gen 3 knock sensors and tell the pcm what knock sensors im using, or am I looking at something more complicated.
Any help woupd be appreciated.

 

[Mounce]

Glad to see you made it over here, welcome to the Nation!

 

[webadict]

Thank you Mounce, I appreciate it. Im just hoping that I can figure this out, because truth be told, this is my daily driver. I only work 4 miles from home, but if I can help it, I would rather not take the chance. I was told by a few people that I should be able to wire these knock sensors up, the find someome with hp tuners or efi live to tell the pcm what knock sensors im using, but I dont want to go cutting up my harness until I know for sure.

 

[NJTB]

Will the sensors from the old engine fit? If not, you can hopefully find sensors that fit the wiring harness with the same diameter and thread as the old ones.

 

[webadict]

Ok, so I solved the knock sensor issue, as well as an unplugged temperature sending unit. I also rewired the cam shaft sensor and took care of that issue. Now, the only codes its throwing are for deactivated cylinders 1, 4, 6, and 7. No other codes show, the reduced power light isnt even on. Im at a loss here. I dont think needing a case relearn would do this, would it? Any suggestions would be greatly appreciated. Also, if there is anyone in the Cincinnati area that can do a case relearn or even a tune for me, I have a new typhoon polished intake with fuel rails and 92mm tb with all of the hardware and new gaskets I can trade. Just sayin.

 

[jimmyjam]

just saw the OP, I did this swapping an ls2 into my impala with a gen3 pcm, basically ground down and re-tapped the gen3 knock sensors down to 10mm or whatever it is. you can google search about relocating the sensors, people recommend altering the knock sensor sensitivity

so is the new engine dod or no? are the dod solenoids connected? might have to get HPTuners or something to turn off DOD. can also case relearn with hpt

 

[webadict]

I have found a bit of information going from 3rd gen to 4th gen, but none going the other way. And no, the motor I dropped in is not a 4th gen with dod, but a 3rd gen running on a e40 4th gen ecm. All issues have been cleared, but the deactivated cylinders(1, 4, 6, and 7). This is driving me crazy. A case relearn wont take until the motor is firing on all 8 cylinders. When I scan the codes, they are for DEACTIVATED cylinders, not mis firing. Any suggestions? And there is no reduced power light on my dash. Go figure.

 

[jimmyjam]

what are the actual code P####

 

[webadict]

Ok, so I know its been awile since my last post, but life sometimes does that to you. Update . . I solved the problem of the knock sensors by buying 2 10mm x 1.5 x 8mm step studs and bolted the 4th gen knock sensors to the side of the block using exsisting holes. As far as the missing, or deactivated cylinders go, it was the unpluggeg harness for the LOMA that was causing the issue. I simply jumped the pins at the connector, making the ecm believe it was plugged in, and all 8 cylinders came to life. No more engine light, no more 4 cylinder rainier. However, 2 days later, she decided to give up the ghost and threw a rod. Yay, right back where I started. But, not to worry, there is a happy ending to this story. The day after, a friend of mine called me and informed me that his wife rolled their Trailblazer ss, and that the motor and drivetrain was available to me if I wanted. So, $600 later and 5 straight nights of both of us getting no sleep after working our day jobs, my 2006 Rainier is very much alive and breathing, with a 6.0l LS2 finding a new home within her sheet metal, along with the rest of the donor trucks drivetrain. Needles to say, I am now a proud owner of a 2006 Buick Rainier CXL SS, lol. A detailed thread with pics and all changes needed, including programming will be coming in the next few days. Until then, I want you all to know how much I appreciate your input and suggestions.

 

[Mounce]

That's gotta be awesome lol. Glad to hear you've finally got a working set up.

 

[The_Roadie]

Not just working, but the ONLY one in the world!