Engine/Transmission (1998.5 - 2002) comp map sensor + smoke?

[bbodammer]

hey guys I want to take a picture of my truck with smoke coming out of the stacks. I've heard of a trick with the map sensor or something that I could then just goose the thottle and get smoke. How is this done and does it hurt anything... throw codes etc... Just want to get a nice photo.

 

[rivercat]

Some bigger sticks will do the trick

 

[Cummins724]

Just unplug your map sensor & it'll smoke. I do it from time to time, never got a code, except on the highway at wot for too long.

 

[bbodammer]

thanks, I will do that and post some pics :-laf

 

[rivercat]

shouldn't 5x5 be the same thing -full fuel at 0 boost?

 

[TURBOs4LIFE]

If you unplug the map and still have the Comp plugged in the computer will see full boost signal even at idle (This is what I see when I have my scantool plugged in) so when u blip the throttle it will provide more fuel since the computer "thinks" you are already providing enough air. I do see a code when done like this. It reads "boost signal too high too long"

 

[rivercat]

We oughta race over 85 from k-town to ridge on 29 some time dude

 

[TURBOs4LIFE]

We oughta race over 85 from k-town to ridge on 29 some time dude

I do need to get my lazy self down to your shop and chat with ya.

 

[KKlingbeil]

You want to unplug the plug that goes into the map on the motor. If you unplug the other one, which goes to the ecm, you will get a code. If you unplug the one that goes to the box, you shouldn't get a code. It will roll good smoke without moving like this.

 

[TURBOs4LIFE]

You will get a code it just doesn't set the check engine light. I can only see the code with my scantool.

 

[rivercat]

I do need to get my lazy self down to your shop and chat with ya.

TO be honest MY location sucks, Way too much overhead for what broke people come down this road day after day coming going to work. So Im gona pack up and leave soon. Go into something else, Not sure what yet.

Do you know a kid with a White SBQC lifted like mine stays around goldhill rockwell, Hes into lanscaping I think atleast part-time Ive' spoke with him once.

SORRY ABOUT THE HIJACK -SORT OF A DUMB TOPIC ANYWAY

 

[TURBOs4LIFE]

TO be honest MY location sucks, Way too much overhead for what broke people come down this road day after day coming going to work. So Im gona pack up and leave soon. Go into something else, Not sure what yet.



Do you know a kid with a White SBQC lifted like mine stays around goldhill rockwell, Hes into lanscaping I think atleast part-time Ive' spoke with him once.



SORRY ABOUT THE HIJACK -SORT OF A DUMB TOPIC ANYWAY

You are ok with the hijack! Yea I know him his name is Miles Barringer I believe. Sorry to hear about the location. I know the last owner that sold it due to the same reason.

 

[bbodammer]

I tried it today and got some good pics I will try to post some. Thanks again Oo.

 

[rivercat]

Not Miles, I whent to school with Miles this is another guy from South Rowan I think, Besides Miles has a-qcLb and he is definitly not lifted like me he is leveled

 

[ROADWARRIOR]

I tried unplugging my MAP today right at the sensor and got different results. With the Comp box turned on, I got some rather abrupt timing changes and it would miss some when I rolled into the pedal. I turned the Comp box off and it drove normal. Oddly, I couldn't get any more smoke to roll with the box on or off with the MAP unplugged. Does something sound wrong here? As far as I know my truck runs like always. The only difference I may have over other trucks is I have a Dr. Performance reflashed ECM from way back in 2000.



Thanks,

Dan

 

[rivercat]

sounds like either bad tap/connection or bad box, You might have to start a thread "what happends when a comp goes bad "

 

[ROADWARRIOR]

I don't have the pump wire tapped. The Comp box is working the same as it has for the last five years. Everything seems to be running just fine. I am just curious why the MAP sensor trick didn't work for me.



Has anyone else tried unplugging the MAP and gotten similar results?



Thanks,

Dan

 

[rivercat]

cause without being tapped you get no additional fuel

The trick = map sees full boost all the time so you get 100% fuel of whatever level your in instantly instead of it slowly ramping up with boost.

 

[ROADWARRIOR]

cause without being tapped you get no additional fuel



This is not true. When I turn the box on, the power and smoke levels dramatically increase. And the response and off boost smoke increase with each sub level. You still get roughly 60hp without the wire tapped.



I agree with your second statement. The fact that it doesn't work on my truck is what I am trying to figure out. The boost fooler is obviously working, because I run 55psi and it doesn't defuel. And I would venture to say the MAP is working, at least somewhat, because when I unplugged it, I had very obvious results.



Other than this "trick" not working, my truck runs great and everything appears to be fine.



Dan