Car won't start after swap to 2 bar OS
03-29-2018, 11:32 AM
#1
Staging Lane
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Car won't start after swap to 2 bar OS Just changed my operating system in my camaro from 1 bar to 2 bar. Car won't start anymore though. A little info about the car it is a 5.3 swapped 94 z28 with 60 # injectors and a 7875 turbo. I have uploaded the HPT file as well.
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04-12-2018, 01:41 PM
#10
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Go to the first/lowest cell in your maf curve and enter 20 g/sec
The maf still needs to fail on a 2 bar SD tune.
The maf still needs to fail on a 2 bar SD tune.
04-12-2018, 08:16 PM
#11
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I changed the OS to 2 bar, and saved the new file as a new name. I wrote the new file to my PCM using write entire. I then went back and copied my VE table from the original tune and put it in the new 2 bar tune. I wrote entire again then tried to crank the car
04-12-2018, 09:41 PM
#12
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Originally Posted by B_Mack15
I changed the OS to 2 bar, and saved the new file as a new name. I wrote the new file to my PCM using write entire. I then went back and copied my VE table from the original tune and put it in the new 2 bar tune. I wrote entire again then tried to crank the car
04-13-2018, 11:34 AM
#13
Ok just for the sake of what it is and for your own knowledge...When you do the 2bar setup, you change the OS, save it..reopen it and change everything you need to change...ve blah blah..then do a write entire. Afterwards, any change you make can be write calibration data as anything you change in that tune from here on out is calibration data. It saves you a step that's all. Should it have messed anything up the way you did it, no it shouldn't but for future reference etc.
when I swapped mine over I fired it up with a maf plugged in as if nothing had changed. I let it run for alittle but and then unplugged the maf to fail it and all was well. Try what the gentlemen above me said
when I swapped mine over I fired it up with a maf plugged in as if nothing had changed. I let it run for alittle but and then unplugged the maf to fail it and all was well. Try what the gentlemen above me said
04-13-2018, 11:36 AM
#14
Ok just for the sake of what it is and for your own knowledge...When you do the 2bar setup, you change the OS, save it..reopen it and change everything you need to change...ve blah blah..then do a write entire. Afterwards, any change you make can be write calibration data as anything you change in that tune from here on out is calibration data. It saves you a step that's all. Should it have messed anything up the way you did it, no it shouldn't but for future reference etc.
when I swapped mine over I fired it up with a maf plugged in as if nothing had changed. I let it run for alittle but and then unplugged the maf to fail it and all was well. Try what the gentlemen above me said.
what are your three maf codes set to in the pcm? Report on first error, report on 2nd error or not reported?
when I swapped mine over I fired it up with a maf plugged in as if nothing had changed. I let it run for alittle but and then unplugged the maf to fail it and all was well. Try what the gentlemen above me said.
what are your three maf codes set to in the pcm? Report on first error, report on 2nd error or not reported?
Last edited by TPIZ92; 04-13-2018 at 10:23 PM.
04-13-2018, 12:22 PM
#15
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Yup. Its not getting fuel until the maf fails. It will not fail until it starts. See the problem? Put 20 g/s in the lowest cell in the maf curve. It will get fuel until it fails. Then it is good after that and runs off the VE table. Every time you do a fresh write it will go through that.
04-13-2018, 12:25 PM
#16
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Ok just for the sake of what it is and for your own knowledge...When you do the 2bar setup, you change the OS, save it..reopen it and change everything you need to change...ve blah blah..then do a write entire. Afterwards, any change you make can be write calibration data as anything you change in that tune from here on out is calibration data. It saves you a step that's all. Should it have messed anything up the way you did it, no it shouldn't but for future reference etc.
when I swapped mine over I fired it up with a mg plugged in as if nothing had changed. I let it run for alittle but and then unplugged the maf to fail it and all was well. Try what the gentlemen above me said.
what are your three maf codes set to in the pcm? Report on first error, report on 2nd error or not reported?
when I swapped mine over I fired it up with a mg plugged in as if nothing had changed. I let it run for alittle but and then unplugged the maf to fail it and all was well. Try what the gentlemen above me said.
what are your three maf codes set to in the pcm? Report on first error, report on 2nd error or not reported?
04-13-2018, 02:58 PM
#17
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I just went through the paidtune you attached and the maf is still set to no MIL. It should still fail out, but I see you posted that you have since tried with the MIL error on first, so that's good. It also still needs fuel in that lowest maf cell, which was set to 2.5 in the tune you posted. i've done enough of these SD with deleted maf that I know it needs that bottom cell with enough air to calculate fuel.
I checked VATS is off, as that will disable injector pulses also. I also suggest setting your min transient fuel mg to 0.010, not 0.000.
Did you or the tuner change the electronic throttle tables from stock - even if you're cable driven, changing those can cause issues in the ECU.
I checked VATS is off, as that will disable injector pulses also. I also suggest setting your min transient fuel mg to 0.010, not 0.000.
Did you or the tuner change the electronic throttle tables from stock - even if you're cable driven, changing those can cause issues in the ECU.
04-13-2018, 10:27 PM
#18
I wouldnt blame the pcm just yet
I drove a car into a driveway, washed it and then it wouldn't start. Wound up being the ignition module failed (mustang). Very random but I immediately thought water fried something though it was just a fluke. Though flashing the pcm is when your trouble started, dont rule out fuel pump issues or relays. Do you hear the pump prime? Are you getting fuel to the rail? Check the free **** first. I would just hooked up your maf, let it dangle and try to start it with all your maf stuff enabled. See if it reacts. If it doesnt, try reading codes from the pcm or logging it while you crank or have the key on. If I info is sent and it communicates, the pcm might be ok.
I drove a car into a driveway, washed it and then it wouldn't start. Wound up being the ignition module failed (mustang). Very random but I immediately thought water fried something though it was just a fluke. Though flashing the pcm is when your trouble started, dont rule out fuel pump issues or relays. Do you hear the pump prime? Are you getting fuel to the rail? Check the free **** first. I would just hooked up your maf, let it dangle and try to start it with all your maf stuff enabled. See if it reacts. If it doesnt, try reading codes from the pcm or logging it while you crank or have the key on. If I info is sent and it communicates, the pcm might be ok.