Got the car to start... but sounds like it's not running on all cylinders
#1
Got the car to start... but sounds like it's not running on all cylinders
So I finally got my naturally aspirated 92 running on my DIYPNP. I'm using the startup map from diyautotune. It needs a fair amount of throttle to keep it running, but it runs very rough, like its not running on all cylinders. We checked with a timing light and saw that all coils are firing, but I'm not sure if I'm actually getting spark in all of them. I pulled the plugs and cylinder 3 appeared glossier than the others.
I did notice that the dwell settings were different in the startup map from what's shown in the startup spreadsheet here: http://www.diyautotune.com/diypnp/ap...3-16b6-mt.html . I put the settings in the spreadsheet into the startup map. Should I use the original startup settings in the map as opposed to in the spreadsheet? They were quite different.
I put the stock ecu back in and it runs flawlessly. What should I look at next? I did set the trigger angle, but we ended up at only +3. Does that sound right?
I should add, that I don't hear the fuel pump prime when the ignition is turned on. i tried jumping FP and GND but it still ran rough.
Thanks for your input.
I did notice that the dwell settings were different in the startup map from what's shown in the startup spreadsheet here: http://www.diyautotune.com/diypnp/ap...3-16b6-mt.html . I put the settings in the spreadsheet into the startup map. Should I use the original startup settings in the map as opposed to in the spreadsheet? They were quite different.
I put the stock ecu back in and it runs flawlessly. What should I look at next? I did set the trigger angle, but we ended up at only +3. Does that sound right?
I should add, that I don't hear the fuel pump prime when the ignition is turned on. i tried jumping FP and GND but it still ran rough.
Thanks for your input.
#3
I attached one log, showing me starting the car and giving it some gas to stabilize the RPMs. The engine was running very rough here. I noticed that O2 voltage was 0, until it went to .3 or so when I closed the throttle. Does 0v mean lean with narrowband sensors? I have req_fuel set at 11.2, as I am on the stock injectors.
#8
I still need to flash the DIYPNP, but when I created a new project with the newer code, I got these warnings:
3 Warnings:
Warning: egoTarget not in current configuration. Value ignored.
Warning: Parameter in msq, but not valid for current firmware: No options found for Bit EcuParameter:spk_config_spka
Warning: MSQ Units Mismatch for EAElagRPMmax! rpm found in current configuration, rpms found in MSQ, values were not converted to new units.
Im not sure what to do about the last two errors. Am I ok to just load the older tune code and save it under the new code? Obviously, I need to change the firmware still.
3 Warnings:
Warning: egoTarget not in current configuration. Value ignored.
Warning: Parameter in msq, but not valid for current firmware: No options found for Bit EcuParameter:spk_config_spka
Warning: MSQ Units Mismatch for EAElagRPMmax! rpm found in current configuration, rpms found in MSQ, values were not converted to new units.
Im not sure what to do about the last two errors. Am I ok to just load the older tune code and save it under the new code? Obviously, I need to change the firmware still.
#9
I updated to 3.2.1 and its still not working. I couldnt get it started for more than 2 secs tonight, but it was cooler out. I verified the injector wires are in place in the wiring harness. I'm not sure what to do next. There are four outputs on the DIYPNP for each INJ1 and INJ2, does it matter which is populated? Do I need an oscilliscope to see is the injectors are pulsing? my shitty multimeter did not move when i checked during cranking.
EDIT Log attached, this is with FP and GND jumpered, since I dont hear the fp priming when the key turns on.
EDIT Log attached, this is with FP and GND jumpered, since I dont hear the fp priming when the key turns on.
Last edited by event; 04-24-2012 at 11:11 PM.
#12
Heres another log with it running. I had to give it a bunch of extra fuel, but it still sounds like its not running on all cylinders. The tune is also attached. I'm not sure why this is being so difficult, I'm not even trying to run sequential fuel/spark
I pulled the plugs. Plug 1 and 2 are completely black, plug 3 is moderately fouled, and plug 4 is in OK shape. Piston 3 looks wet and piston 4 looks a little wet with some dry spots. I did add a lot of fuel to get the car to run better which explains why there are plugs that are completely black. What should I look at next?
I pulled the plugs. Plug 1 and 2 are completely black, plug 3 is moderately fouled, and plug 4 is in OK shape. Piston 3 looks wet and piston 4 looks a little wet with some dry spots. I did add a lot of fuel to get the car to run better which explains why there are plugs that are completely black. What should I look at next?
Last edited by event; 04-25-2012 at 08:41 PM.
#14
I'm also assuming that I was running rather lean at one point, since I did start hearing knock at 1500 RPM or so.
#17
Nobody has any insight? I'm stumped. I replaced the spark plugs and do have spark on each. With the 12V power supply, I did the output test and did see an injector pulse reading for each INJ1 and INJ2. Does this sound like a settings issue or a wiring/hardware issue? I'm about ready to throw this thing out the window...
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