I finally got around to pulling my engine codes.
At first I got 20,26,27,33,40,41.
I had done some work so I reset the codes and pulled them again.
20,33, and 41 are the only ones that are left.
I know 20 is an OMP code, but I thought that would send me into limp mode.
I have it plugged in, but I've got the front cover blocked and I'm premixing.
The engine I bought had a s4 front cover so... I didn't have a choice.
33 is the ACV right? All of that is plugged up I'm guessing that the solenoid or the ACV itself is bad?
41 is the vdi... Safe to assume that this is the solenoid failing as well?


I'm mostly curious if the OMP throwing a code would cause the engine to cut fuel at high rpm.
I noticed recently that if I try to make it anywhere past 4,000 rpm it sounds like the engine isn't getting fuel/getting too much. Bogs down bad. Won't accelerate anymore.

 

your car is in limp mode due to the omp. search on this topic you will find more information.

 

I considered it being limp mode, and tbh, it might HAVE been limp mode last night when the bogging first occured.
I went and played with the connectors for the OMP and moved where I had it located; somebody had un-tied it from the strut tower and it was dangling by the connectors so there was a lot of stress on them.
I drove around and warmed the car up and WOT to 5,500rpm without it bogging down at all.
I'm going to try and reset the engine codes; pull them again and see if the OMP code is gone as well.

 

as far as I know, code 27 of the OMP will fry the ECU. I have not heard of code 20 frying the ECU and you may get lucky that it doesn't.

Any code OMP related will result in limp mode. Keep driving the car like this and the engine will not be getting any oil injection. The OMP will be the last of your concerns. The car will run fine after you turn the key to OFF and back ON and the ECU will trigger limp mode after a while of engine running. This is why you were able to drive fine for a while.

Try to use the search button next time: https://www.rx7club.com/2nd-generation-specific-1986-1992-17/we-have-code-20-progress-382593/

 

There is always the chance that I am misreading two long flashes for two short flashes and it is the CAS that is messed up.
I stated that I am premixing, the OMP is not hooked up; so it isn't injecting anything anyway.
I drove it for two weeks after I put the new engine in there without a problem.
I really think when somebody moved it they made the connector not completely connected causing the code for the OMP.
I already read all the threads about the OMP throwing codes, frying the ecu, etc.
Like I said, I was wondering if the other codes could be causing the problem.
If I need to replace the OMP then that is what I will do before it fries the ECU.

 

No, its the OMP. Codes 30 and up are non critical and usually emissions /rats nest related.

 

Okay, I know its been awhile but I figured I'd update this.
I found out the ACV was unplugged and then reset the ecu codes.
This time I counted the flashes ten or fifteen times to make sure I had them correct.
The codes I got were 11 and 51.
I know why 11 showed up but I have no clue on 51 unless it is because I've got a switch hooked up for my fuel pump.
Bypassed all the factory wiring because my fuel pump relay is fried.
Is there a way to get around code 51?