- Joined
- Aug 8, 2018
- Messages
- 375
- Reaction score
- 194
- Location
- California
- My Car
- 72 Fastback - 351C-4V, Fitech EFI, T56 Magnum 6 Speed
I'm a bit of a hack when it comes to this stuff and can deal with basics, but could use some help before digging into this.
I have a 351C 4V in my '72 fastback project. The engine has always run rougher than seems right, but I chocked that up to carb tuning etc as we've been focused on converting to manual trans and other items. After a basic tune up (plugs, wires, cap and rotor), the car runs better, but still not quite right and seems like it's missing at least at low RPM. The car is running a Mallory Hyfire VI-A ignition and distributor.
I finally broke out my IR temp gun and measured the temp of the headers at each cylinder and my #1 cylinder is cold. It is getting spark and if I pull the plug it's of course nasty / fouled and covered with gas. Swapped it out with a new one and same thing. That cylinder just seems dead.
I probably won't get to this for a few days, but could use some guidance on debugging it. I'm thinking my first stop should be a compression check, but beyond that I really don't have a game plan. I'd appreciate any recommendations on where to go with this and how to debug it.
Thanks
I have a 351C 4V in my '72 fastback project. The engine has always run rougher than seems right, but I chocked that up to carb tuning etc as we've been focused on converting to manual trans and other items. After a basic tune up (plugs, wires, cap and rotor), the car runs better, but still not quite right and seems like it's missing at least at low RPM. The car is running a Mallory Hyfire VI-A ignition and distributor.
I finally broke out my IR temp gun and measured the temp of the headers at each cylinder and my #1 cylinder is cold. It is getting spark and if I pull the plug it's of course nasty / fouled and covered with gas. Swapped it out with a new one and same thing. That cylinder just seems dead.
I probably won't get to this for a few days, but could use some guidance on debugging it. I'm thinking my first stop should be a compression check, but beyond that I really don't have a game plan. I'd appreciate any recommendations on where to go with this and how to debug it.
Thanks