225 Optimax Gurus??

[txriverrat2001]

Anyone here have experience with the Opti's?? Mine on the center console developed a low speed miss. After balancing out the cylinders with my DDT it's obvious #2 is the culprit. Compression is good. I've swapped the coils, plugs, plug wire, coil module, even the fuel injector and it's made no difference. It sounds like an electrical miss - much like a plug wire making one mis-fire. The pressures on the fuel rail and air rail are within spec.

Anything else I'm missing here?

[MOBILEMERCMAN]

If everything checks out and it is still missing you should send out all 12 injectors.

http://www.brucatosvs.com/fuel_injector.html

[Sean H]

We went through the exact same thing with a 2.5 last weekend, it was the ECU.

[MOBILEMERCMAN]

Sean did it show anything with the DDT?

[Sean H]

Gary had run the DDT before he left and it showed perfect. Which is why the injectors and ecu were the last things we looked at, but that was it.

[Sean H]

The easy test is to swap ecu's (I am assuming twins) and see if the miss follows the ecu to the other engine.

[txriverrat2001]

Unfortunately it's a single engine. Likewise - my DDT shows nothing wrong. Ran through all the test and checked while the engine is running and nothing is amiss.........

Before I dump $$ on an ECU I'll pull the rail and swap the air injectors.....

Was it the same cylinder by chance?

[Sean H]

It was #3... since the engine was freshly rebuilt, we could look in the 6 cylinders and actually see that #3 had no carbon on it at all, still looked new, the other 5 were sooty.