camaro1999ss818

Well, I have my 1999 Camaro SS that has no cats. So when I connected the obd2 scanner I expected codes in regards to the cats. I got P0332, P0420, P430... P0332 means knock sensor 2 below threshold. The other two are catalyst below threshold which I expected. I want to know if the P0332 is a result of no cats. If it helps, once in a while I get a knocking noise in the car. Any suggestions will help! Thanks

camaro1999ss818

anyone?

nomasterase

iTrader: (4)

I would say no the knock sensor code is fairly common on these cars and usually due to a faulty sensor. Its a hard enough job that you should replace them both while youre in there

camaro1999ss818

I am going to change them out this week. Also, since I am down there I want to torque down the coolant lines that run under the intake manifold( I am leaking coolant there). I seem to get a thin layer of coolant under the throttle body. where the timing chain cover connects to block. Are there any gaskets there?

Will having no cats affect the performance of the car? I just want to know if the 2nd o2 sensor will mess with the air to fuel ratio and make the car run lean etc...

chrysler kid

iTrader: (14)

Removing cats will increase horse power in most applications however it will decrease your mileage to the tank. (2mpg city usually)

Knock sensors are fairly common issues, I would also replace your fuel filter and spark plugs while you do the knock sensors.

I made a day out of removing my intake manifold by cleaning everything while I removed parts. I would suggest using a shop vac to suck dirt out of the valleys around the intake manifold before you remove it just to prevent dirt from getting into the valces

defeat54

iTrader: (3)

You could buy the rear 02 sims to get rid of your code.

JUSTINSWS6

How hard is it to get all of the bolts off of the intake under the cowl? There are 8 bolts right

fastazzls1

p0420 and 430 are catalyst efficiency codes thrown due to the pcm is seeing the rear o2 sensor mimic fronts you can a resistor to make the voltage return to .450 mv also there are gaskets on the cylinder head vent lines under intake and the valley pan gasket maybe leaking inspect everything and replace as necessary

fastazzls1

there are 10 bolts get some old fule line cut a slit down one side and use ot to hold the bolts up in the rear and they are farely easy to get at get 1/4 ratchet and a couple of extensions follow detorque procedure and good luck bro

camaro1999ss818

Thanks a lot guys. I am going to do this job tomorrow and ill keep you guys updated.

If the gasket for the head vents are ripped is that a dealer item only or will Autozone have it?

chrysler kid

iTrader: (14)

Autozone will have intake manifold gaskets.

camaro1999ss818

I am changing them out right now, The knock sensors were covered in oil so I am changing out the grommets...

camaro1999ss818

Where does the Knock Sensor harness connect to? Thats the only connection I dont remember disconnecting...anyone?

fastazzls1

there is a connector at the rear of driver side head that clips on a bracket DO NOT forget to reclip it to the bracket i like to put things back exactly how they go and make sure you route the harness correctly or youmay have some trouble getting the intake to sit flush also i like to put a little rtv around nock sensor grommets to seal them off from weather all though not common on ls1s notorious on 5.3s and 6.0s

camaro1999ss818

Why dont these grommets stay in place! >:O is there a special trick?

sjsingle1

iTrader: (1)

the KS connector is the blue 1 i think

sjsingle1

iTrader: (1)

yep..it is

camaro1999ss818

Thanks a lot sjsingle1 ! That helped alot

camaro1999ss818

Here is pics of the process so far. I am going to finish tomorrow since Im getting new gaskets for the head coolant vent tubes!...

camaro1999ss818

As I was putting the intake back in I think I hit the oil pressure sensor. Is it supposed to be wobbly?or stiff....