My 96' EX-V6 with 183,000 has tons of problems. Its been idling badly lately so I swapped out the plugs, cap, rotor, and the wires were replaced less than a year ago. But that didn't help.

Now the car will not idle and won't stay running unless I keep my foot in the gas...however that causes a slight popping sound...which I would assume is a cylinder misfiring. The CEL trouble codes come out to be:

P1300
Random/Multiple Cylinder Misfire Detected

P0301
Cylinder 1 Misfire Detected

P0302
Cylinder 2 Misfire Detected

P0303
Cylinder 3 Misfire Detected

P0304
Cylinder 4 Misfire Detected

P0305
Cylinder 5 Misfire Detected

P0306
Cylinder 6 Misfire Detected

So I cleaned out the inlet air control valve (IAC), checked the coil, and the ICM (Ignition control module), and still no luck. The cap was installed correctly along with all of the wires. What would cause all 6 cylinders to misfire?

I haven't check fuel pressure yet however when I turn the key to the ON position I hear the fuel pump buzz in the back.

So what gives?!?! :thumbdn:

-B

 

sounds like your timing/firing order is off.

i hope you used all oem parts and nothing aftermarket

 

try valve adjustment, with this many miles I would believe that can be one of the problems.

 

You can guess all you want, but if you want to know for sure where to start looking get your car gas analyzed. If you want take it to a shop and ask them to hook up a gas analyzer (while car is under operating temperatures) and write down readings at both idle and 2,500 RPM. Bring back results here and we'll tell you if you're dealing with a electrical/mechanical/rich/lean misfire and tell you what to check.