CamaroJim

HI, I just signed onto LS1tech although I have found good info on the site in the past. I am a Camaro nut and used the Team Camaro site for years. One of the moderators actually turned me on to this site. I have few Camaros but the one that brought me to need help from you folks is my 2002 SS. It has low miles (21,000), is mostly stock and only comes out on nice days. My wife was driving it last weekend and it started running rough. I put a code reader on it and am getting code PO300 which is "multiple / random cylinder misfire detected. The battery is pretty new with a tender on it. All the wires look good. Bought a new AC Delco coil and tried it on several cylinders with no difference. Not sure where to go next. Looking for some insight. thanks in advance, Jim

67 SS Clone, Drop Top, 327, Edlebrock heads, M-22, 3:73 posi, red / black bumble bee stripe
69 Coupe, 383, Dart heads, TKO 5-spd, 3:73 posi, white / red stripes
02 SS, Drop Top, 6-spd, SLP goodies, black on black

RixTrix

Optispark?

peterpar

I've attached a pdf copy of the DTC PO300 section from the 2000 Camaro Service Manual. I don't think it should differ too much from the 2002 manual.

King Nothing

iTrader: (9)

93-97 came with the LT1 and had the optispark, 98-02 was the LS1 and had coil on plug ignition.

RPM WS6

iTrader: (3)

So many things can cause a P0300, this code alone won't really point you in a specific repair direction. Do you have a scanner that gives data beyond just reading the code? That would be helpful for diagnostics.

mck9898

21,00 miles, wow, normally a short in a coil , vac leak, plugged injector but low mileage not sure how, maybe in storage a wire got eaten by a mouse, bad fuel...

JD_AMG

Is there anything that you changed on the car recently? What all is not stock engine-wise on the car?