1999 Blazer p0300 code

[BlazerLT]

Yes, typo

[blazerbrat]

P0800 is an typo. STILL P0300

[blazerbrat]

Yes, sorry, P0300. Nothing else seems weird. But then again, it's hard to tell what else is wrong when the idle is so rough, it's backfiring, and it smells so rich. I did notice after i changed the coil and erased all codes, the SES originally turned off. After about 1 minute of run time, it came back on with two P0300 codes, and an additional o2 sensor code. That was the first time the O2 has ever thrown a code. I erased all three, changed out the fuel filter, and tried again. The two P0300 returned, haven't seen the o2 again. Probably a fluke?

I think she is going into the shop tonite. I will update you on what they find out.

Recap:
What's wrong:
P0300 -- rough idle, backfire sound

What's been replaced:
plugs -- ACDelco, replaced this week
wires are less than 8000 miles old, so are the cap and rotor.
coil has been replaced this week
fuel filter replaced this week

Karen's husband, Eric

[blazerbrat]

Ok we took it to the shop. Found out what it was also.. Much to my husbands dismay it was two iginition wires switched on the drivers side. So it was an easy fix. Thank you all for your replys.... Hope this post can help someone in the near future.

[Turbocpe]

Numbers 1 and 3? They don't go in the same order that the rest of them do, so I can see it being mistaken.

Good to hear that you got it fixed.

[BlazerLT]

Excellent to hear.