This I gotta see. A quadrotor toon!

Ran the engine again today. Ran terribly and fouled plugs.

The only difference was we ran water through the intercooler. I didnt realize the guy installed a two stage pump so it always pumping through the intercooler. We stopped the flow yesterday, but let it run today.

Engine was sooo rich it was terrible.

My boat didnt have a dual stage pump just a water pichkup for the intercooler. Could this be the issue?

The short answer is YES with reference to how it ran with water running through the intercooler at idle and not up to temp.

Don't know about injector screens, never seen anyone sale those. Should be cleaned with standard screens on.

IC on during idle can affect af about 1 full ratio, but what your describing is more than that. If motor is not in boat, then it's just off, whether something changed such as fuel psi regulator, bypass system, linkage, etc., something is different. Check TPS voltage, fuel psi, timing in reference to what ECM is commanding. Then check AF ratio and modify cal accordingly. There's probably not a smoking gun here, its just off, needs to be adjusted. Once you check ignition and IAC, gotta look at AF.

Dustin

Thanks,
Dustin

If it's popping back through only one blower, I would bet you have a broken drive on that blower. Hard to diagnose "over the net"

I pulled the flame arrestor off the side it was popping though, throtle blades werent closed all the way!!! So I fixed that.

Rotors turned fine. So nothing appears broken.

Its definatley in the tune with that cold water running through the intercooler at idle. The guy has a choiice - retune or pull the dual stage pump off!!!

I can check all the above with the program.

Thanks Dustin. And you too Richard, I know you know alot about these set ups.

Dustin - Arent they Rochester 95 injectors? Should be able to get screens and orings somewhere. It looks like the took them out when they flowed them in May.