LT1 Misfire Issue, running out of ideas...
06-22-2012, 07:36 PM
#1
Teching In
Thread Starter
Join Date: Mar 2012
Posts: 1
Likes: 0
Received 0 Likes
on
0 Posts
LT1 Misfire Issue, running out of ideas... Hey guys, I posted a thread a while back, but am still having a problem. My 97 Lt1 Z28 has been having a misfire issue and I am running out of ideas on what it could be. To start I recently did a bunch of work to the engine listed below:
- LT4 Hot Cam Kit, 1.6 RR
- MSD Coil
- New plugs and wires
- ASP underdrive and overdrive pullys
- 58mm TB and ported intake
- gutted cats
- 160* tstat
- Dynomax shorties
- PCMForLess Tune
- New Fuel Filter
- New opti
- New IAC Valve
Originally, I installed a chandler opti and since I started having the misfire after 500 miles or so, I figured that would be the problem. I took it to a shop to double check everything and the mechanic also believed the opti was bad. I just had a new AC Delco unit put in today and he says it still not running right.
We are both somewhat lost on what it could be. My only ideas are that the ICM went bad, or I didn't properly adjust the valves and one is hanging open. I've never done that before which is leading me to believe that might be the issue.
I know this topic has been addressed and readdressed, but I've been doing searches and haven't found much help. Anyone have an idea of the issue? Thanks.
- LT4 Hot Cam Kit, 1.6 RR
- MSD Coil
- New plugs and wires
- ASP underdrive and overdrive pullys
- 58mm TB and ported intake
- gutted cats
- 160* tstat
- Dynomax shorties
- PCMForLess Tune
- New Fuel Filter
- New opti
- New IAC Valve
Originally, I installed a chandler opti and since I started having the misfire after 500 miles or so, I figured that would be the problem. I took it to a shop to double check everything and the mechanic also believed the opti was bad. I just had a new AC Delco unit put in today and he says it still not running right.
We are both somewhat lost on what it could be. My only ideas are that the ICM went bad, or I didn't properly adjust the valves and one is hanging open. I've never done that before which is leading me to believe that might be the issue.
I know this topic has been addressed and readdressed, but I've been doing searches and haven't found much help. Anyone have an idea of the issue? Thanks.
