P0300 code w/o cause? need help

[cyclescientific]

I just had another engine put into my 2002 Rodeo (2WD - 3.2L V6). I keep getting the P0300 code but the engine runs smoothly, has new plugs, and i checked all of the coils for continuity (they all showed 3k Ohm on my multimeter.) Any ideas? I can't help but think something other than the plugs and coils is causing the code to pop up.

[cyclescientific]

I forgot to mention that the check engine light flashes while accelerating but then stops when the engine is idling or not under load.

[amigo-2k]

what kind of plugs did you put in it? It will toss a flashing CEL if you stick other brands then what it came with.

[trooperbc]

did you clear the codes ? they stay in memory until you do.


//bc

[Cat Fuzz]

Yep, the newer Rodeos are really picky about spark plugs.

[cyclescientific]

I cleared the codes numerous times and it keeps coming up (I have my own OBDII in the glove box with the Haynes manual.) I searched around a bit and noticed all the talk of the spark plugs so I ordered some of the Denso plugs (the OEM double platinum) from sparkplugs.com. If that doesn't fix it I can't think of anything else. When the engine was replaced, so were all the gaskets plus the guy does good work so I suspect all the sensors were thoroughly cleaned. Just pisses me off that I just got my car back with a low mileage engine thrown in and it runs smooth as butter minus the damn CEL constantly flashing.

Thanks for the help guys - this is definitely a solid forum (unlike some others I've tried to use in the past.)

cheers,

James

[2eyefishclaw]

poor ground at the intake could cause this thats where the ground is for the Ion module

[cyclescientific]

Thanks for all the help guys - I messed with it a bit and turned out to be two things:

1. The mechanic that swapped the engine didn't put the coils on in the right order (namely, the cyclinder #6 specific coil was on cyclinder #2)

2. Wrong plugs - I put some denso's on. The NGK plugs also work (thats what I had on the old engine.)

[surferfletch]

Thanks for the solution.