I shouldnt say I have them "tuned" good with my pocket logger, (can see the flames coming heh..) I have timing as high as it will go at idle, and 0 to +5 fuel trim. I use SAFC to tune..

 

ew ew one more thing! The plug wires i switched to are magnecor. Now I hear everyone using them...BUT...arent they low resistance wires? The factory manual calls for 22k wires, and I beleive magnecores are way down to like 4k resistance or something... could this affect random engine misfires????

 

It's probably your cams. Welcome to the club.

 

When I put in my Webcams I started to get the P0300 code regularly. After installing the 1G CAS, it went away.

P0300 is normal with large-ish cams.

 

quick question, is the P0300 code is different than the random misfire code associated with 6bolt motors in 2g's? I have HKS 264/272's.

 

I would like to differ from that web cam theory, correct me if im wrong, im not trying to be a smart *ss, i have the same code p0300 which is the multiple misfiring code, i don't have cams, all i have is simple mods like uip, air filter, cat back, without cat. I have changed the spark plugs and the wires, now i have the bpr6 and accel 805mm wires. Still i get the same things and my spark plugs are currently burned, they are balck and im running really rich. So they other alternative that they have told me is the coil pack.

 

95 manual calls it "random misfire detected"

The big question is, how does the ECU detect it? If you're getting the code but don't feel mis-fires, then something else must be up, knowing how it detects it would at least point you in the right direction.

 

Well, i think i do feel the misfire, what do you think, sometimes im riding at about normal speed ad the car at around 3k rpms and if i floor is it just bogs, it builds boost and everything but the car barely moves, then other times the same situation but the car pulls good. So sometimes the car like chokes or it gets clogged, that's what it feels like. and i know im wasting lots of gas. Now i dont' want to go and replace my wires and or sparkplugs and so i could jsut mess them up again . I have replaced all of the above and they always end up the same, so i beelive it has to be something else, i don't want to think about the coil pack, but is an alternative.

 

did either of you guys ever figure out what was up with your cars? I have been having the same problem only that mine was alway cylinder 1 misfire until tonight i got the random/multiple misfire. i have also changed my plugs and wires AND it still keeps happening.

 

did either of you guys ever figure out what was up with your cars? I have been having the same problem only that mine was alway cylinder 1 misfire until tonight i got the random/multiple misfire. i have also changed my plugs and wires AND it still keeps happening.

Nope. I start my car, wait 20 sec for the light to come on, erase the code, and I'm off. It never comes back on until i shut the car off, and it is off for more than 3 min. I don't feel any misfires either, and everything seems to work well.

FWIW the code is sometimes P0300, multiple misfires, or P0301 which is cylinder 1. I got P0302, which is cylinder 2, once. Same code, different cylinder. Doesn't mean anything. I just clear it and continue on.

 

my car seems to run fine when i am driving normal, i only get the misfire CEL when i am getting on it.:slam: sux because i got all these people who want to race me, but i can't get around to it because it seems like everytime i run my car hard i get this CEL.

 

Thats wierd. What kind of settings do you have set on the AFC both Hi and LO?

 

lo - 30 %
hi - 70 %

 

is there some way to check a coil to see if it is good or not? i don't wanna shell out alot of cash for trial and error tests. i already got new plugs and wires, and that didn't seem to do the trick.

 

I found that the better i tuned the car, the less often i'd get the 300 code. Log your O2's and tune out any over rich/over lean conditions that trip the code.

i've since gone DSMLink and have no worries

 

so my tuning is way out of wack, it will cause this code? i never got this code before i had my own logger, and i was just trying to tune by egts. now that i got the logger, i can't seem to really tune it because i always end up throwing the code.

 

Have you invested gated the possibility of a vacume leak related miss?

 

Don't mean to bring up an old thread but I recently installed cams and started to get the p0300 code today (2 days after cam install). Anyways, i was just wondering if that was the case or what did you guys that had the problem figure out? Thanks.

 

Same thing here ... just put in HKS 264/272 and getting the P0300 code every other day or so. I'm going to tune some more but man I have CELs...

 

Old ass thread, but did any of you get your problems resolved? I just installed a set of 264/272's and sure enough I start getting the p0300 code, every other day or so. It will only happen when i first start the car or after it has sat for a while. Never when actually driving.