Multiple Cylinder Missfire Help ( I KNOW THERE ARE ALOT OF THESE POSTED)

[Alexsered]

Okay, so, this is all over the forums, people complaining about this p0300 CEL code (multiple Cylinder Missfire) and everyone is talking about ways to fix it, but it doesn't seem like anybody ever says if they get this code fixed or not.

Order of events:
1. CEL flashes and than stays on, on my way home from work yesterday, instead of going home, I went to CP-E HQ to get it checked out, found out it was this code.
2. Cleared the codes
3. Driving home from CP-E, CEL flashes and turns back on.
4. Go back to CP-E HQ to find out it's the same code.
5. Went to Auto-Zone, got some Lucus Octane booster, and got new gas.
6. Erased the codes and drove the car very hard for 5-10 minutes and code does not turn back on.

Okay, so the CEL has not turned back on, does anybody really believe that the gas I had in my car was really THAT bad to throw a code consistantly considering I already put about 220 miles on that tank of gas without throwing any codes. There was never any engine sputter or rough Idle or anything. I feel like it will turn back on, planning on cleaning the spark plugs tonight. Any Ideas people?

 

[dread]

buy new plugs and check the coils.

 

[dkswim]

there has been tons of storys of gas stations wattering down gas. and its always possable that tanker truck made a mistake in filling underground tanks. i have friends that have had problems w there diesels water and ive seen one w gas

 

[yager]

Ive been getting this code. I just reflashed to stock to see if it would clear, it did. I have the denso iv22 on order, i will go back to stage 1+ms cai once i replace the sparkies and stretch the coils. Seems like this should clear the issue up.

 

[cageyvet]

buy some new plugs and if you have check the gap

 

[oskinosmee]

Im having this problem from installing the standback. When i bypass it it runs fine.

 

[dread]

your standback might be defective, call cpe.

 

[nig3]

How does the car idle? if its idling weird could be a vacuum leak causing the misfires. or i would think its from your standback thingy, isnt that the piggy back module that just ties into all the ecu wiring?? if so double check all the connections.