I still run the original opti that came on the car (it has 35K miles on it). I had a hunch I had an opti failing so I switched over to the Delteq system.

I believe the Delteq still uses the opti to pick the signal? So, does that part of the opti fail?

You can see in my dynosheet about 6100 rpm the car starts acting up and at 6500 it just takes a crap.

It is not valve float.

I run the Delteq spark plug wires sent with the radiator mount kit and NGK-TR6's gapped @ .030". The car has no alternator or charging issues.



Any thoughts?

 

I have the same question. My car runs great at lower rpms but sometimes breaks up between 6200 and 6500.
Kory

 

Why not contact JC Hyde at Delteq, and ask him? He would know how the Delteq processes the Opti signal.

To answer the questions about the Opti, it is feeding the high and low res pulse signals from the Opti optical sensor to the Delteq. If the pulse signals are corrupt, I would assume the Delteq would not be able to correct them, and provide the correct ignition timing. Yes, the optical sensor can go bad gradually. Typical problem is a buildup of rust particles in the LED/receptor portion of the sensor. I would suspect as the rust builds up, the ability of the sensor to read the tiny slots in the optical wheel would be reduced.

 

I contacted Delteq on this issue. They did not have an answer for me so I had to do some research and discovered that the optical sensors do not fail, but the bearings are prone to it.

This led me to replace my stock opti and when I took it off you could hear pieces of plastic broken inside. I opened it and the rotor was destroyed and the optical sensor had some nasty wear marks on it.

Of course now the issue is I put the new opti in the car and it ran for 10 minutes and just shut off for no reason.

I get spark...fuel...and I have air. So now I have to see if the replacement piece failed?

 

Not sure how you dicovered that, because it is not correct. I have a 60K mile Opti that came off my car to prove it.