Help,Misfiring!!!
Thread Starter
Heel & Toe
Joined: Nov 2000
Posts: 19
Likes: 0
From: Raleigh, NC, USA
Help,Misfiring!!!
PCM P0300 H was pulled off my '99 FRC after my car started seriously misfiring this afternoon. Can anyone tell me if the '99s still have an EGR valve and if so where is it located?
I did have TPIS headers put on last Sat. and all was fine until this afternoon. I'm hopings its an EGR value stuck open, I couldn't see any gaps from the headers to the block which would represent an exhust leak but I couldn't see completely under the car when the pipes meet the CATs.
Also, my check engine light initiallt started to flash and then went solid. I'm freaking out since the car was running great till the TPIS install. I will check for header cracks tomorrow when I have good daylight.
I did have TPIS headers put on last Sat. and all was fine until this afternoon. I'm hopings its an EGR value stuck open, I couldn't see any gaps from the headers to the block which would represent an exhust leak but I couldn't see completely under the car when the pipes meet the CATs.
Also, my check engine light initiallt started to flash and then went solid. I'm freaking out since the car was running great till the TPIS install. I will check for header cracks tomorrow when I have good daylight.
Drifting
Joined: Aug 2001
Posts: 1,903
Likes: 0
From: Oakhurst NJ
Re: Help,Misfiring!!! (c5trinity)
Same thing happened to me with my FLP header install. I changed to MSD wires and that helped since the headers get so hot it cooks the stock wires but i still had a misfire. It turned out i cracked a sparkplug when i put in the headers and after a new set of NGKs everything was fine. Check plugs and wires first
Instructor
Joined: Jun 2002
Posts: 136
Likes: 0
From: gowen mi
Re: Help,Misfiring!!! (kh24)
Same thing happened to me with my FLP header install. I changed to MSD wires and that helped since the headers get so hot it cooks the stock wires but i still had a misfire. It turned out i cracked a sparkplug when i put in the headers and after a new set of NGKs everything was fine. Check plugs and wires first
Thread Starter
Heel & Toe
Joined: Nov 2000
Posts: 19
Likes: 0
From: Raleigh, NC, USA
Re: Help,Misfiring!!! (c5trinity)
For all those whom beat on the spark plug wires, see the man at the door for your door prize. Check out the pics below. All wires show signs of being burnt a bit but, good 'ol #7 was toasted...the MSDs held on as best it could I guess.
Head the tch who installed my headers take a look at it this morning to make sure there wasn't anything residual left. 'Tech II' shows everything all clear. Thanks for you comments and suggestions.
Head the tch who installed my headers take a look at it this morning to make sure there wasn't anything residual left. 'Tech II' shows everything all clear. Thanks for you comments and suggestions.
