Ok,

Can't figure this one out. I have a turbo 96 lude H23. For some reason, my check engine light turned on and I wasn't even boosting. The check engine code is 45, but that's not even a code in the book. Anyone know what this is?

If I reset my ecu, it clears, and I can even run for a day or two and it doesn't come back even at full boost, but then it'll just come on when i'm either idling or driving normal (around 3000 rpm). I do notice that when I turn on my engine, it idles kind of high (almost 2000 rpm) and stays there until i tap the gas a couple times then it falls down to normal range (700-1000 rpm).

My best guess is that it's the missing link MAP sensor bypass valve. I checked and I have no other vacuum leaks anywhere and I have tried cleaning the missing link and tightening it extra tight. But like I said, things are fine for a day or two then it comes back.

My only other guess is maybe is it possible that I'm running too rich? Or would that not cause high idling and a check engine light?

Anyone have any ideas?

 

-Code 45- System Too Lean or Too Rich, malfunction in the fuel monitoring systems.

 

Thanks man...

That makes perfect sense w/ what's going on w/ my car.

Where did you find code 45? I have a prelude manual and it only goes up to code 43.