Alright, so I just increased boost in my 95 integra LS (b18b1), and when switching to an AEM 5 bar MAP sensor, tuned fine when the engine was warmed up (water temp 200deg), afr's were fine, and my boost controller at 85% duty cycle was only producing 11psi of boost...now whenever the engine is not around 200 degrees, my afr's are extremely rich (idling is at 10.0, engine winding down is 10.5 or more rich), and I'm hitting boost cut (which is 14 psi) all the time. Could this be a bad map sensor, bad boost solenoid, something else? Any info woul be helpful thanks

 

Nope. That sounds like its all tune related.

 

You had a boost leak when we tuned it, and fuel cut is turned off which is why its rich on decel, both of which you are/were aware of.

Need more time to figure why your car is such a *****. Most likely the map sensor voltage so its reading the fuel map wrong and/or the battery offset for the injectors.

 

What did you do to "switch" to the 5bar? Full re-tune like before, or just rescale the ecu's maps?

Best thing to do is get the car 100% BEFORE adding boost, let alone a lot of it. A tiny little problem on a stock 127whp motor will be a huge problem at power levels 2-3x higher.

 

I pulled the map from my old setup which ran the car perfectly after I just rescaled the maps. Car was already warmed up though, so cold startup was not tuned. Thats always been a pain to dial in. But everything was in order before I left.

And that has been his problem since day 1...

 

You would post chris haha...yea I figured cold starting was just because the engine was already heated. I was more wondering about the voltage difference, and I forgot fuel cut was turned off, my bad.