HELP! Car running like crap after BHG fix

[starscream5000]

A 10 second search under "knock sensor removal" yeilded this: http://www.supramania.com/forums/showthread.php?t=7952&highlight=knock+sensor+removal

It's not a hard tool to use man, don't take it for granted.

 

[Burntz]

So the knock sensors will cause this much havoc? Ive had them go bad on LS1 cars and never cause this much trouble. Maybe these cars ar different. Ill have to figure out how to get the back sensor out by the starter.

When the head was off I had the #1 piston TDC and the crank at 0. Got everything put together and its out 180* out. I dont understand that.

Is your LS1 boosted? No, I didnt think so... lol


Knock sensors are a lot more important on a boosted car where you have a/f ratios, and detonation to worry about, so knock comes into play a loooot more.

 

[Z'mnypit]

Is your LS1 boosted? No, I didnt think so... lol

Knock sensors are a lot more important on a boosted car where you have a/f ratios, and detonation to worry about, so knock comes into play a loooot more.

Nope, it doesnt need boost! Fast enough already...


Ok, well Ill focus on getting rid of the KS codes. And go from there.

Thanks!

 

[Idealsupra]

Ok, well Ill focus on getting rid of the KS codes. And go from there.

Thanks!

there will not be a "there" once you fix the knock sensors the car will boost like normal.

and for the record are your KS BROKEN? as in the plug part itself is wobbly or broken off? if they arent physically broken i would look more into your wiring then the actual knock sensor.

 

[Z'mnypit]

there will not be a "there" once you fix the knock sensors the car will boost like normal.

and for the record are your KS BROKEN? as in the plug part itself is wobbly or broken off? if they arent physically broken i would look more into your wiring then the actual knock sensor.

I sure hope so...

No the sensors arent broken, Ive got the instructions for the rewire mod so Im going to start that this afternoon. Im pretty sure its the wiring its all hacked up from the previous owner.

I have one question about the rewire. Should I or should I not ground both ends? Ive read both have advantages and disadvantages.

 

[Idealsupra]

I sure hope so...

No the sensors arent broken, Ive got the instructions for the rewire mod so Im going to start that this afternoon. Im pretty sure its the wiring its all hacked up from the previous owner.

I have one question about the rewire. Should I or should I not ground both ends? Ive read both have advantages and disadvantages.

you really just need to ground the ecu side

 

[Z'mnypit]

you really just need to ground the ecu side

Awesome. Then thats what Ill do. Hopefully I can get this finished tonight.

 

[Burntz]

Yea do it, and then let us know if we were all right

 

[Z'mnypit]

SHE RUNS! And pretty strong. Thank the lord. No more SES light. Did the knock sensor rewire mod and all is well now. Going to shim the wastegate a little tommorow and she how it does. Only running around 5psi right now. Also going to dial in the timing 1st. Just want to say thanks for all the help, I wouldve never figured any of this out without yall!

 

[mattjk]

uh, might want to do a re-torque before going boost happy there, bud.

 

[Z'mnypit]

uh, might want to do a re-torque before going boost happy there, bud.

Re-torqure what? The head bolts? They are all ready at 78ftlbs. Ive already checked them and none of them have moved a bit.

 

[mattjk]

If you've check it, and it's fine, then you're OK. However, common procedure is:

You need to drive it about 1000 miles and get some good heat cycles in there, and do a re-torque since you are using a composite gasket. The studs don't move, but the gasket will compress.

Don't be lazy, I would check it anyhow... I checked mine 3 times.

 

[jdub]

Check the timing belt tensioner after about 500 miles or so as well.

 

[mattjk]

btw, don't shim the wastegate, that's so hokey. make yourself a nice manual boost controller. it's super easy.

http://www.gusmahon.org/html/boostcontrol.htm

 

[starscream5000]

Like mentioned earlier, stay off the boost for at least a good 5 heat cycles (about +45mins driving each time) then re-torque the head .

 

[Z'mnypit]

btw, don't shim the wastegate, that's so hokey. make yourself a nice manual boost controller. it's super easy.

http://www.gusmahon.org/html/boostcontrol.htm

So just put this between the 3-4in vacuum line from the wastegate to the turbo? Would it hurt to make the lines longer so that you wouldnt have to remove everything to adjust it?

 

[starscream5000]

Shouldn't, just don't go too far away, like inside your car or something. Try to keep it as close as possible the the wastegate, like mounted on the passenger side strut tower....

 

[Z'mnypit]

Shouldn't, just don't go too far away, like inside your car or something. Try to keep it as close as possible the the wastegate, like mounted on the passenger side strut tower....

Yeah thats what I wanted to do is mount it buy the strut so I can adjust it. Thats where it goes though correct on that small line?

 

[starscream5000]

Yes, just make damn sure the new tee line is no where near any hot sources that can/will melt it in half. If that happens, you're in a world of hurt if you don't catch it soon.

 

[mattjk]

if you don't want to spend the time to make it yourself, it's cheap to buy pre-made. It's the best working manual boost controller I've tried.

http://www.3barracing.com/product_7.htm