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I got the new Reeds installed, and it appears that the issue is resolved!
I ran the engine for over 2 hours, and so far so good.

Big thanks to Don for your guidance and fast shipping.

It’s Definitely not in break in mode according to the mechanic. Maybe that oil is being blown out the loose reeds?

Thanks for your input, I am definitely learning a lot about these engines during...

372174372175372176372177372178Here are some pics

Thanks Don. Temperatures have been verified for both banks. 126-127 degrees at idle and 130-131 with high rpm.

Compression was done a few weeks ago, all cylinders are around 125 psi. Mechanic...

I swapped MAP sensors with the other engine, and the plugs started to fouled again within 2 hours.

I am going to request another air/fuel test and leak down results.

In the meantime, here are...

I replaced the thermostats last week, and the temp is now perfect at ~ 130. So this isn't a temperature issue any longer.
Since all the plugs are fouling at the same time very quickly, the MAP...

Unfortunately the plug fouling issue has returned in just 2 hours of run time. The engine gradually loses power, then at idle there is a slight misfire.

Don, thanks for taking my call this...

Thanks for the info Don!

Update: A new TPS and linkage arm has been installed, along with new thermostats. The one's I bought were defective :thumbsdown1:

Another set of brand new plugs were...

Thanks Don, I will check the thermostats.

I honestly don't remember the exact pressures, I know they had a 10 PSI differential.

Any thoughts on if a bad TPS can cause plug fouling?

Is there...

1. SN 0T652016
2. Year/Make/Model - 2003/Optimax XS

Hello,

I am having a few issues that I need to run by the experts.

The engine has been running fine for over a year.
All of a sudden, a...