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single digit dreamer
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Joined: Mar 2002
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From: omaha ne
i have an autometer electric fuel presure and boost gauge. the sensors for those both operate on 0-5volt. i wired them into the rear 02's. they only read up to 1.1v so i had to put a resistor in series with the 0-5volt signal. it is a 10megohm resistor. then i used the calc pid that is avaliable on efilive v5 to covert the volt signal to psi. took me about 4 hours from start to road test and seeme to work well. cost me $2.00 for resistors over the parts i all ready had. now i can dump the pillar gauges for good. i hate those things and never look at them anyways.
not sure why the fuel presure is so jumpy(pillar gauge is steady). also the boost gauge i have reads only 0-15psi, the sensor maxes at 16psi.
i need to check out the wideband next, see if there is a way to get it to work. i dont think there are anymore calc pids avaliable though.
not sure why the fuel presure is so jumpy(pillar gauge is steady). also the boost gauge i have reads only 0-15psi, the sensor maxes at 16psi.
i need to check out the wideband next, see if there is a way to get it to work. i dont think there are anymore calc pids avaliable though.
Thread Starter
single digit dreamer
iTrader: (6)
Joined: Mar 2002
Posts: 9,757
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From: omaha ne
i belive this could be done by buying the sensors only and finding a 5 volt source to power them with. no need for the entire gauge/control box. a factroy 2/3 bar map sensor might even work
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Verdad Gallardo Thread Starter
single digit dreamer
iTrader: (6)
Joined: Mar 2002
Posts: 9,757
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From: omaha ne
i think i can get the voltge into efilive but i want to be able to convert it into actual a/f numbers. there appear to be only 2 calc pid's but i haven't looked at it that close.
Thread Starter
single digit dreamer
iTrader: (6)
Joined: Mar 2002
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From: omaha ne
looks like i should turn the timing down a little too. i have been runing race gas for awhile now but just switched back to pump. 21deg+10psi is probably too much for pump. that KR is probably real.
Look like you are after the same thing I am. I know where you can get the O2 sensor for 45 bucks shipped, and would like to just be able to plug the sensor into my PCM and use it to monitor the A/F of the wideband sensor. I don't see why you couldn't do this. Let me know how it's looking.
Justin, wideband sensor needs control voltages that the stock PCM doesnt provide - wont work.
Parish, if your wideband output is linear its easy to make a calc PID in EFIlive. If it isnt you can just read the voltage in EFIlive and convert with a chart. I used what steve suggested and took a couple 1.5 batteries in series and a good digital voltmeter and calibrated EFI live with the batteries through the stock PCM and came up with a correction factor to directly read the voltage. Then used a calculated PID to read direct. I used a 2 bar GM map sensor to log boost through the EGR sensor and the a/c pressure sensor for the wideband - worked great.
Parish, if your wideband output is linear its easy to make a calc PID in EFIlive. If it isnt you can just read the voltage in EFIlive and convert with a chart. I used what steve suggested and took a couple 1.5 batteries in series and a good digital voltmeter and calibrated EFI live with the batteries through the stock PCM and came up with a correction factor to directly read the voltage. Then used a calculated PID to read direct. I used a 2 bar GM map sensor to log boost through the EGR sensor and the a/c pressure sensor for the wideband - worked great.
Thread Starter
single digit dreamer
iTrader: (6)
Joined: Mar 2002
Posts: 9,757
Likes: 4
From: omaha ne
i got the wideband to log too. go here and look at the bottom of the thread. >> https://ls1tech.com/forums/forced-induction/217958-maxed-maf-resistor-mod.html
the wideband has a 0-5v out, the signal is linear from 10-14.7 and then liniar but at a diferent rate for 14.7 up to 18. i just put in one formula for 10-14.7 and it will read leaner than it actualy is once it is above that point. i did the pid calc trick and for an input i am using the fuel tank presure input, that seems like one that isn't too important to me.
the wideband has a 0-5v out, the signal is linear from 10-14.7 and then liniar but at a diferent rate for 14.7 up to 18. i just put in one formula for 10-14.7 and it will read leaner than it actualy is once it is above that point. i did the pid calc trick and for an input i am using the fuel tank presure input, that seems like one that isn't too important to me.