Hey, To start please, please if you don't know what your talking about don't reply. I am an ASE Certified tech and uti grad, but (ofcourse) I do not know much about aftermarket engine management. I saved the car from becoming scrap, rebuilt pretty much everything. Now I have posted this question before with idiotic answers. I have done TONS of research and know for a fact it is not hondata.

Here's the deal, I have a D16z6, 50 trim, external gate on 8lbs, dsm injectors with resistor box, chipped P28,

I am not running o2 or a map sensor (NO CEL). I originally was going to up the boost from it's current 8lb setting to 12lbs and retune, But was told my ecu would trip limp mode. This is not true as my wastegate failed and the car will now boost till fuel cut around 17lbs.

Needless to say I'll have a new wastegate friday. The car has a 2-Step, Very high rev limit I won't take it to, But any idea's what I'm running? If you need more info ask. Please intelligent educated replys please. THANKS GUYS. on PS3

 

No map sensor? that doesn't make sense. Usually people say you can't boost past 12 psi because that's the max the stock map sensor will allow. Now your talking about raising the boost on the setup before you do that you need to figure out what tuning software was used and go to a competent tuner and a bigger map sensor. Maybe you don't have a cel because they removed the bulb.

 

it must have a map sensor, it could have a gm 3bar map which looks nothing like a honda map sensor. i would buy a wideband o2 if i was you, i can not stand to drive a turbo car with out a wideband. If your going to be turning up the boost a couple lean pulls and the engine is toast.

 

following this thread, an intelligent thread on Honda Tech, wow. I'm curious as to how this all gets figured out.

 

So we need to fins out what EMS you're running.

 

No map sensor? No o2? No cel?
Meed more information before i even began to help.

 

it sounds like your setup has been programmed to basically run in open loop and is making assumptions on the 02 level and MAP based on other parameters. You really need the O2 sensors and Map sensors to make this work properly, check to make sure the check engine bulb is there, or hasn't simply burned out from constantly being on, does it come on in diagnostic mode when you first start the car? it should to show it's functioning. I've4 seen cars where the wire to the bulb was even cut at the computer. have you tried to pull codes from the computer to see if it's throwing anything?

 

Map sensor is very important sir. Your ECU needs to know how much pressure the engine is seeing. You should try to be on closed loop with a wideband simply for the engines safety. And I'm going to assume this isnt a properly tuned setup either. Add 02 and map and go see a tuner. Your engine will thank you.

 

I know hondata has an option to run on alpha-n wich sets your fuel and timing coloumns based off the tps signal not the map sensor.
Why not take off the 6 screws your ecu cover has and look inside? Take pics?? For doing a lot of research your post is very noobish.
Your ecu has to be chipped in some way if your not running a map sensor. Do you have a multimeter? Is the pigtail still in the engine bay for the map sensor? Is it discconected?

 

I apolagize I lost my computer for a few days. I also just converted the alternator to obd2 which is nothing special but had to be done. My CEL Bulb is in it's my shift light : )

 

Also i have 9 pics of the ecu open posted in my other post I will move them here when I get home.

 

The map sensor is gone I have the most basic harness you can get alternator, starter just the basics but it runs absolutely beautiful.

 

One member had a valid point i have not checked for codes. What I figured was the car was stepped down to OBD0

 

But my CEL is my shift light.

 

No idle surge I mean it runs GOOD if anyone's local your more then welcome to take a look.

 

You do know what a MAP sensor looks like don't you? I don't see how you're running without one.

 

The last reply was exactly why I stated educated answers only.

 

It must be run on alpha-n if it is running well and there is legitimately no MAP sensor. ECTune also enables alpha-n and I believe Chrome Gold/Pro as well. But the only setups that REALLY use them are ITB setups as the MAP signal is very unreliable on ITB setups.

Realistically, you should wire in and run a MAP sensor. It would make things much easier, and much much more predictable with a boosted setup.

Since alpha-n tuning runs on TPSxRPM (instead of load by manifold pressure xRPM) you would be relying on the fact that your car would boost exactly the same at the same TPSxRPM index, which is highly unlikely.

 

given the options, it is a fairly educated response. You do know that these cars sometimes have MAP sensors mounted on the firewall?

 

Indeed. I think some pictures of the engine bay would tell us a lot here. Lets start with those and proceed from there.

 

ASE certifed and trying to run a Honda w/o a MAP sensor...

 

The reason they were saying limp mode is because the stock Honda map won't read above 12psi. Alpha n is ok for na (we run our 600rwhp c6 z06 that way) but on a boosted car your ecu needs a pressure reference and an air fuel reference so it can accurately meter fuel. Not to mention with no o2 sensor or wideband you'll never know if you have a fueling issue until its too late. You could break a fuel pump, have a dirty/bad injector or a vacuum leak and you'd never know it

 

II have a feeling he's uti certified...

 

But whose the person that doesn't know what's in his own car? Hm.
What happened to this? Here it is. So much for helping us help you. Some interior engine bay shots are well in order.
You're probably running a basemap. <-----There's your answer. You posted this same question 2 months ago and still hadn't figured it out?
I hope that engine is built. Keep boosting that little D on a basemap you know nothing about and you won't have it long.
Get a real EMS and stop wasting everybody's time.

 

These guys are here helping you and actually being very kind, sometimes it's tough to interpret intent through the Internet.

I understand you "know" a lot since your a certified mechanic but you yourself admitted to not knowing Hondas well. There is a VERY probable chance that your car has a MAP sensor and your just unable to find it since your unfimiliar with the car.

If you can take a photo of your throttle body area and another around your fire wall, no need to be so defensive most of the folks are here to learn/help.