Hey guys... this is the second time that I post a tread the first time it was because my car had just died on me ( timming chain) now after the engine rebuilt and several upgrades my car is running like ****... I intalled a racetronix fuel pump system ( walbaro 255 and harness) and then the new MSD billet optispark system, I had a misfire, since I needed to remove the water pump and it was time, I added a electric water pump from Meziere, and added the headers ( shorties from Hooker SC) I had MSD wires and look fine. I have the NGK ready to be install but I am not sure if this will fix my problem...

Now here is my problem..
After installing all of that i got this:

P0174
P0300
P0336
P0443
P1642

any clues as to what could this be from:???

 

Not familiar with LT1's, but I'd start by looking them up at http://shbox.com/1/Dtcs.htm My guess is the CKP code is giving you the most problems.

 

I have a 1996 camaro with the obd2 soes this make any difference with the chart that you mention? i look and it said 93-95... so im not sure..
I know i have a misfire.. the crank positioning sensor is out of range, the fuel pump circuit is high in input, the o2 sensor from bank 1 is reading a very rich mixture, also, i have the purge valve silenoid from the egr is bad or something the the circuit is not working properly...

 

Find GM OBDII code definitions here: http://service.gm.com/gmspo/mode6/index.html

 

Thanx man... this link really helps...

 

Look at the bottom of Shoebox's chart. There are several "tabs". You need to click on the tab labeled OBD-II.

P0174 = Fuel trim system lean Bank 2
P0300 = Engine misfire detected
P0336 = Crankshaft Position (CKP) sensor circuit performance
P0443 = Evaporative Emissions (EVAP) purge solenoid control circuit
P1642 = Fan Control (FC) relay 2 and 3 control circuit

Misfires can cause a "false" lean condition. The CKP sensor might be indicating misfires, or it might be hitting something inside the timing cover (faulty install?). The purge solenoid is an electrical cirsuit fault - either the solenoid is faulty, or the wiring is messed up. Fan control may indicate a relay problem. Swap the 3 relays around and see if the problem moves with the relays.