Okay, so I started thinking earlier, I have an obd0 system, and one of the largest problems going turbo, is that the map sensor recieves a positive pressure signal and sets off the cel and doesn't quite react the way you want. My question is, can you set your map sensor to get its signal before the turbo, therein it still reads vacuum. Essentially what you are doing is pulling the vacuum tube off the throttle body and putting it on a nipple on the intake pipe after being filtered but before the turbo. Make sense? People do this sort of thing on cars with a maf as they wanted to run a vented blow off valve, so to measure what is actually going into the throttle body after the valve.

 

i wouldn't do that, because any boost leak in the system could likely cause the turbo to overspin and cause turbo damage.

also, the comparison to the MAF trick isn't exactly accurate.

Besides the fact that the boost is so instantaneous that you're still going to have the code issue regardless of where the MAP sensor source is, be it before or after the wastegate source.

 

At first I had to re-read your statement, but I understand now. As far as what I am talking about, I am not talking about sharing the vacuum amongst the map and the wastegate, just the map having its own.

 

right, I understand what you mean, but I can't imagine it making any difference where the MAP source is.

 

Chip the ecu and use BRE or Turboedit or better go OBD1

 

What does this have to do with welding or fabrication?

 

Nothing, but it's amusing! lol

No, in short, you can not do what you are trying to do. There is no way to make it happen, don't bother trying to figure out a way to make it work, the MAP sensor has to read MANIFOLD PRESSURE, it does not read flow like a MAF (MASS AIR FLOW) sensor.

 

I think that you should look into how EFI works.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tharptroy &raquo;</TD></TR><TR><TD CLASS="quote">I think that you should look into how EFI works.</TD></TR></TABLE>

Seriously.

The ECU uses the MAP sensor to determine the volume of air that's entering the engine. If you put the MAP before the turbo, it's going to end poorly for you.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SovXietday &raquo;</TD></TR><TR><TD CLASS="quote">

Seriously.

The ECU uses the MAP sensor to determine the volume of air that's entering the engine. If you put the MAP before the turbo, it's going to end poorly for you.</TD></TR></TABLE>

Actually, the ecu uses the MAP sensor to determine the pressure in the intake manifold

 

even if you did hook up the map sensor to the turbo intake it would read backwards. boost would read vaccum and idle would be none, or full load.

 

True, but to what extent depends on your intake setup. I have a MAP sensor on my compressor inlet pipe and i see 97kpa at 30psi and 99kpa at idle, so pretty much the same. If you had too small of an intake tube or a crap filter then you could see quite a bit more vacuum at high boost.

I know that you know that, just throwing it out there. lol

 

there is 2 options.


chip your ecu.

blow up your engine.

 

Okay, So I accidently put this in the wrong forum, I meant for it to be put into forced induction, but I doappreciate your inputs. Like I said, more or less this is about theory. Theory does not support end result. I'm looking into getting turboedit and getting a burner. Once again fellas, thanks.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by shortyz21 &raquo;</TD></TR><TR><TD CLASS="quote">there is 2 options.


chip your ecu.

blow up your engine.</TD></TR></TABLE>

Get a missing-link MAP adapter and an FMU

 

why didnt u listen to what i said in your other thread... jeeez

this shall be my last post to a thread you start.