Will Autolite 25's work with my setup???

[cabech984]

I bought these to find out that most are using a 24 or 23 instead. I dont think the are doing so good. When cruising, the car seems fine, but once you give it some throttle it sputters, misfires, etc. I checked the plugs, they are tan/ light brown in color.

I am breaking in the engine, running zero boost under these conditions. Is there too much fuel for no boost? My setup is in my sig. Please, let me know what ya'll think!!

 

[d0n_3d]

How new is the ignition module and coilpack? If you are mis-firing under Autolite 23's, you have a problem elsewhere and it's not the plugs. What gap you runnin? Fresh fuel filter? Condition of plug wires? We need more info...

 

[mybuick]

"I checked the plugs, they are tan/ light brown in color."

that is what the plugs are supposed to look like. i would find a person near you with an extra coil/module and swap and see if the spuddering goes away.

 

[cabech984]

Coil & Module are used, age unknown. I was running the 25's but just switched to the 24's. Seems to run better but misfire is still present under load. Plug wires are brand new wires from John's performance.

Actually the fuel filter is old, I'll slap a new one in there and see whats up. I am running a TH400 w/o any VSS signal. I am getting the code 24, could/would this be involved in any of my problems?

 

[cabech984]

Oh yeah, I set the Fuel Pressure right at 43psi w/ vac line off. TPS is at .42 idle, 4.78 WOT. The o2 mV are fine until I give it some throttle, then it spikes to zero and then balances back to 770's. I need to get ahold of someone around here to borrow a known good coil & module.

 

[xcessiv6]

Sounds like a ground problem , Run a ground wire from that back bolt of coil pack to ground make sure the mounting plate is grounding the module. Paint and powder coating can restrict grounding.

 

[cabech984]

Sounds like a ground problem , Run a ground wire from that back bolt of coil pack to ground make sure the mounting plate is grounding the module. Paint and powder coating can restrict grounding.

Gotcha, I'll definatly do that, actually found a loose ground wire by the battery. Dont know if that could be it though. I'll try that w/ my list of checks that Im gonna do as well!!