Need help with EFIE on 2003 Dodge Ram 5.7L

[dennyk159]

Painless
Are talking about something like this?

http://www.youtube.com/watch?v=8Me3tLO3btw

It seems easy enough, & uses a AA battery like you were talking about...

[Painless]

Yes! That's exactly what I was thinking about!

Good to see that others are experimenting with it.

[Sockfilter]

Painless,

I did check the voltages from 12v gnd to the O2 sensor and was getting a reading from 2.5v to 3.5v. On the EFIE, I replaced the 1m ohm resistor that connects the O2 input to a 10m ohm resistor. On the output of the EFIE, they use a 10k pot which connects between two diodes. I moved the pot connection to the upper diode so that it would output up to 4v.
The EFIE is working ok now, but will still turn on the sensor light if the EFIE is turned on before closed loop operation.

Just a thought, when you start your engine cold, the O2 sensor should be in a Open Loop, rich condition, maybe that is what the ECU is expecting to see untill the O2 sensor reaches the 600f temp to close the loop and engine settles back down to idle, in which the ECU expects to see varying O2 readings from 0.1 to 0.9..

Thus the reasons for check engine lights being thrown before the O2 closes the circuit??

Just a thought,

Sock

[superbee383]

Painless,

Yes, I think using a battery is a good idea.
Also, I need to increase the capacitance in my EFIE. The timer needs to be at least 30 seconds. This should take care of the check engine light problem.
I was thinking of using a precision 5v regulator or even a 1.2v reference regulator with the vehicles 12v system. This would take care of the charging system changing the voltages up and down.

[moore6649]

I have tried that, what I ran into was that when the current ran flat for a while the ecu went into trouble mode and reverted to the lookup tables ignoring the voltage altogethe

93 ford f150 5.0l

[theramsey3]

I have tried that, what I ran into was that when the current ran flat for a while the ecu went into trouble mode and reverted to the lookup tables ignoring the voltage altogethe

93 ford f150 5.0l

i have a question for you did you wire the efie in a series or parallell