Do these numbers look right?

[buzzinhalfdozen]

Ok, Bobby how bout this. Where is your MAP located..in the ECU or out, in either case why don't you try this. Disconnect the vacuum hose from the engine that hooks to your MAP sensor install a hand operated vacuum pump and pull a vacuum on sensor to around 40ish PKA see how your Pulse width responds, it should go down. Looks like the MAP is very high in the idle shot you posted, other than that and the fact your P.W. looks extremely high the rest looks normal to me. Another check is to use your vacuum pump and pull a vacuum...read the gage (on the pump) and see if it is close to what your ECU is reading. this should tell you if the MAP is skewed or not. Please try this if you can and let us know the results. Not knowing your set up (engine size, injectors cam, ect.) I'm merely guessing but I'd expect to see maybe 2.9-3.? M.S. of pulse width at idle. Again good luck. Joe, Bobby I also noticed you have nearly 2 volts difference in batt. voltage. Though I don't believe that is causing the issue you have you need to be aware that voltage has a direct effect on the injector "on time" just something to think about. On another note does your ECU have any type of "blending function" to blend between the TPS and the MAP sensor to correct for poor MAP signal @ idle?

[buzzinhalfdozen]

Bobby, if you can please try the test I described using a hand held vacuum pump as I'm quite certain the MAP input you're seeing at idle is the cause of your rich fuel mixture. Please try and see if the gage and your MAP reading on the laptop agree while applying vacuum to it...you can do that with the engine off. If they are off by a wide margin then there you go, if not then please post up the results of bringing the MAP to around 40ish with the engine running and see if your pulse width number decreases. Joe

[Ed Wright]

I can't read his gauges on my phone.
My raggedy-azzed junk idles about 65 KPA.

[Dave Noll]

It show's -1.9 psi @ idle & -6 @ 2500. Your 65 KPa @ idle converts to -9.5 psi. On the scanner I used to use it would show an actual O2 reading & a light would come on showing when it went into closed loop. Does this software do that ?

[buzzinhalfdozen]

Ed, his is 86.xx KPA @ idle. Reason for my reply, not far off Baro, tells ECU engine is under heavy load (well you know that) reason for extra fuel.

[Signman]

If open loop the O2 Sensor is out of the equation but stills is reading way lean if the plugs are showing very rich.

If the MAP sensor is the problem why not just unplug it. The ECU should go to a predetermined value and should adjust the fueling with TPS and Temp Sensors. Probably very similar to Alpha N.

Go into the fueling map while running and lean out the cells being used paying attention to the idle rpm and how the car sounds.

Lower the fuel pressure will lean out the whole map.

Just throwing out ideas.

If the sensors you are using are all used unknowns get everything new, Rock Auto is about as cheap as you may find unless your local parts supplier gives you a good discount.

If you are not confident in working with the fuel map call your tuner or bring the car back to him. May be money well spent.

[Alex Denysenko]

Originally Posted by Bobby Fazio

But wouldn't "open loop" behave as though there is no o2 sensor connected? It all comes down to MAP sensor and Intake Temperatures, correct? Is there anyone I could possibly send the DFI box to for checking? I feel there might be something internal going on.

Bobby e-mail pics of your DFI plugs to Tony and me so we can see if it matches up to ours
our DFI's are much older but if the harness plugs match up we should be able to test it for you on our cars. if all is well the readings should be the sameon our laptop

[Ed Wright]

86 KPA is way wrong.

[Bobby Fazio]

Guys thank you very much for all the replies and advice. I'm at work and just got a free min to check my phone. All I checked on map sensor today was I watched the voltage drop when pumping but didn't do an exact measurement of hand pump HG to laptop kpa display cause I had to leave. Alex and Tony I will snap pics of those plugs when I get home. Also David Barton thank you for your generous offer.

[Bobby Fazio]

Originally Posted by buzzinhalfdozen

Bobby, if you can please try the test I described using a hand held vacuum pump as I'm quite certain the MAP input you're seeing at idle is the cause of your rich fuel mixture. Please try and see if the gage and your MAP reading on the laptop agree while applying vacuum to it...you can do that with the engine off. If they are off by a wide margin then there you go, if not then please post up the results of bringing the MAP to around 40ish with the engine running and see if your pulse width number decreases. Joe

I'm confused because a conversion table says says 86kpa is 12psi so why am I idling at -2 psi? Anyways my vacuum pump is inHg.. so now I have to convert that also.