Yeah, IPU/XIM is checked off.
would inductive delay play apart in not wanting to start?
XFI: New motor-will not start.
- Thread starter karolko
- Start date
Yeah, IPU/XIM is checked off.
would inductive delay play apart in not wanting to start?
turbobitt
Well-Known Member
- Joined
- Feb 14, 2002
Don't think so. Also make sure the XIM dwell override is not checked off. If so, it will default to the XFI tables that are pre populated with garbage data.
AG
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turbobitt
Well-Known Member
- Joined
- Feb 14, 2002
I would say your good to go as long as the rest of your previous tune is loaded in. Guess we have to wait 2 weeks to find out.
AG.
turbobitt
Well-Known Member
- Joined
- Feb 14, 2002
It was unclear from the OP but I didn't get the impression he was updating from pre 2.0.
AG
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Lance and Allan,
The XFI was already flashed and working as on 2.01 software before I flashed it to 2.051
unfortunetly I am away from the car so I cannot plug into the xfi to verify what you are mentioning Lance, but I can't see the 2.051 flash screwing that up can it?
The XFI was already flashed and working as on 2.01 software before I flashed it to 2.051
unfortunetly I am away from the car so I cannot plug into the xfi to verify what you are mentioning Lance, but I can't see the 2.051 flash screwing that up can it?
Doubtful. Also make sure that the crank and cam LEDs on both the XFI and XIM are flashing illuminated when cranking.
Hi Lance,
Yes I did that. both the cam and crank signals are flashing on both boxes and the injectors are flashing bank to bank during cranking.
I really hope it was those two tables ( FEC and individual fuel tables that is causing my no start issue.
You would be the one to answer this: would those two table effect anything during cranking? I thought the only table being used for fuel is the cranking table during cranking? How about the injector offset vs battery voltage...Is that table being used during cranking?
Adrian
Yes I did that. both the cam and crank signals are flashing on both boxes and the injectors are flashing bank to bank during cranking.
I really hope it was those two tables ( FEC and individual fuel tables that is causing my no start issue.
You would be the one to answer this: would those two table effect anything during cranking? I thought the only table being used for fuel is the cranking table during cranking? How about the injector offset vs battery voltage...Is that table being used during cranking?
Adrian
The cranking fuel table forms the base pulse width during cranking. Since cranking fuel is only used while in bank to bank mode, no individual cylinder corrections can be applied. When cranking, BPW is only modified by the fuel energy constant and fuel pressure correction. The result is stored in the gross pulse width variable (GPW sensor). Easy to monitor and check...
Thanks for great explanation Lance. This is making more and more sense. Since the FEC was maxed out I can understand why the a/f was so rich when cranking and that it did not change even if I completely zeroed it out. Hopefully this solves my issue.
When I go to crank this thing over next time I plan on data logging the event: can you give me a list of all the important things you would want to datalog and watch to determine what my issue could be IF I cannot get it to start this next time.
Thanks again for the explanation and help.
Adrian
When I go to crank this thing over next time I plan on data logging the event: can you give me a list of all the important things you would want to datalog and watch to determine what my issue could be IF I cannot get it to start this next time.
Thanks again for the explanation and help.
Adrian
okay update guys, I finally got home and had a chance to upload my adjusted tune: and I managed to make it fire.
I can only keep the car running for 1-2 seconds: it hums at 2k and then immediately shuts off.
I asked Cal and he quickly told me that it could very well be my 5 bar map sensor; so here is my follow-up question:
How many of you guys have had to adjust the calibration on your 5 bar map sensors?
With my old 3 bar I have 89Kpa with the car not running, and with the 5 bar it shows 48 not running and for the brief moment that it is, it reads 16 Kpa.
I want to thank everyone who has helped me out with my issues once again. I'm almost there, just in time for the snow
Adrian Karolko
I can only keep the car running for 1-2 seconds: it hums at 2k and then immediately shuts off.
I asked Cal and he quickly told me that it could very well be my 5 bar map sensor; so here is my follow-up question:
How many of you guys have had to adjust the calibration on your 5 bar map sensors?
With my old 3 bar I have 89Kpa with the car not running, and with the 5 bar it shows 48 not running and for the brief moment that it is, it reads 16 Kpa.
I want to thank everyone who has helped me out with my issues once again. I'm almost there, just in time for the snow
Adrian Karolko
turbobitt
Well-Known Member
- Joined
- Feb 14, 2002
What 5 bar sensor are you using ? I found most of the default map files to not so accurate for the AEM sensors. If you have an AEM sensor I can send you a corrected file. Should read near 98-100 KPA engine off.
Also, If I'm reading your post correctly, it sounds like you changed the map sensor without updating the Map calibration file. This is really bad. You will have to also adjust and rescale your tables and make adjustments accordingly. For example, with a 3 bar map, the XFI will scale the tables with 3 bar being the maximum value. Switching to a 5 bar the tables will have most likely new map values in each row so the VE numbers will need to be shifted or adjusted to the new scale. Same for timing tables.
Allan G.
Also, If I'm reading your post correctly, it sounds like you changed the map sensor without updating the Map calibration file. This is really bad. You will have to also adjust and rescale your tables and make adjustments accordingly. For example, with a 3 bar map, the XFI will scale the tables with 3 bar being the maximum value. Switching to a 5 bar the tables will have most likely new map values in each row so the VE numbers will need to be shifted or adjusted to the new scale. Same for timing tables.
Allan G.
Last edited:
Hi Allan,
The MAP is a FAST 5 Bar ( so basically a SSI Technologies Sensor)
As for the fuel and spark tables, they should be 100% okay, as this is a completely new tune for a new motor. I was referencing the 3 bar map sensor with my last motor and tuneup. ( I had a historical datalog of me cranking the car so I could get exact numbers). And since the Kpa numbers should be the same regardless of which map sensor you use, I am pretty sure that I need to recalibrate the sensor.
How much different would the map calibration file be from a 5 bar AEM to a 5 bar FAST sensor? I was really under the impression that they are infact all rebadged SSI Sensors. Correct me if I am wrong.
Adrian
turbobitt
Well-Known Member
- Joined
- Feb 14, 2002
I'm not familiar with the Fast 5 bar but if it's reading as low as your saying then something is wrong.
As far as the y axis, that could be just the way it was scaled by the tuner assuming you didn't do it. Typically if you change from a 3 bar to a 5 bar map the system will change the y axis scale and could be changed by the tuner.
AG
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As far as the y axis, that could be just the way it was scaled by the tuner assuming you didn't do it. Typically if you change from a 3 bar to a 5 bar map the system will change the y axis scale and could be changed by the tuner.
AG
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turbobitt
Well-Known Member
- Joined
- Feb 14, 2002
Mine is linear and the x axis voltage numbers are equally spaced such that the linear line represents linear output from the sensor.
AG
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