only 2cylinders spark on pro tec

First off -- Welcome to the CCFan site. You've come to the right place for help on your CC.

Your ProTech ignition problem is not unique. If you do some searches on this topic, you will find a lot of good info here. Many consider the ProTech engine management system to be a "ticking time-bomb". It's just a matter of when the bomb will go off.

It is unlikely that you will find replacement parts to fix the ProTech. Not to worry however, as there are reasonable solutions.

My 1994 engine was similar to yours with throttle-body fuel injection and the ProTech system. My fuel injection started failing 2 to 3 years ago, but I lived with with it. One of the 3 injectors had failed and was dribbling or spitting. The engine ran poorly at idle with horrible hole-shot as the bad injector was making the air/fuel mixture very rich. Fuel injectors were no longer manufactured and much internet searching turned-up zero. Last fall, my ProTech died completely and I had to be towed back to the marina.

I called PCM and told them my story. They recommended that I retro-fit my engine back to carburetor and distributor as they had no parts to fix the TBI or ProTech.

The project wasn't too hard and the end results have been outstanding. I wish I had done this conversion 3 years ago when the fuel injection started failing.

Here is a thread to what I did:

Winter Project

Not all of it will apply, but it may give you some ideas.

JQ

Thanks for the input. It definitely sounds like I will have to do the retro fit kits I was just hoping for a cheap fix. Disappointing that they don't have replacement parts for the pro tec stuff. I noticed you used a dui ignition. The kit from pcm uses a Mallory distributor. Anything better about one or the other?

I converted my 1993 to a DUI from the Pro Tec and am very pleased. The fuel injection adds another wrinkle to your problem, but it has been done before. I have two sets of coil packs, but don't know if either of them are good. The one I took off my boat had such a weak spark that my timing light could not read the signal. I am willing to mail them to you, but would recommend you do something else. If you want them, PM me. I have no idea if the coil packs are the same from 1993 to 1995.