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    Help 1990 Vette closed loop tuning

    I've got my 90 vette built 350 engine six speed manual running great in open loop only and typically only drive like that because closed loop pulls so much fuel it is beyond the scope of my wideband...
  2. How am I going to plug that in to tunerpro? Can I...

    How am I going to plug that in to tunerpro? Can I splice that into my ALDL somehow? I already know for sure the issue is in the tune and not a fuel supply issue. It's a fuel control issue.
  3. I had a similar issue when I built my setup but...

    I had a similar issue when I built my setup but it sounds like your car was already running fine as is. My car had the map wires reversed. It was also doing strange things before I made the switch in...
  4. Why is it that my fueling is so high on the lower...

    Why is it that my fueling is so high on the lower KPA's? I know I must have made an adjustment to some kind of variable that did this but I do not remember what it was. It actually runs good this way...
  5. Not as much progress as I wanted today. Some...

    Not as much progress as I wanted today. Some things I noticed that are going on. If I use closed loop it stays active or it's fuel trims stay active even after I turn it off again. What happens when...
  6. Say you have a built engine like mine. You start...

    Say you have a built engine like mine. You start with the factory tune and the only items that should need to be changed are Fuel/timing maps, injector offsets, cylinder volume, injector flow rate...
  7. Making progress on the tune today. I used an...

    Making progress on the tune today. I used an interpolation calculator to find my injector offsets and the tune is much happier now. I still had to get the MAT compensation adjusted to get my AFR's...
  8. I appreciate the suggestion but would only...

    I appreciate the suggestion but would only consider it if that ECU is boost friendly
  9. Yes they are. I bet this will make a big...

    Yes they are. I bet this will make a big difference in the tune. And by the way I am using a wideband AEM EUGO I think you asked earlier.
  10. Here's the injector offsets that my tunerpro RT...

    Here's the injector offsets that my tunerpro RT rejects every time. For Bosch type 3, 32lb

    9V
    0.954994

    9.5V
    0.827989

    10V
    0.725101
  11. I think I got'em they were both .php before...

    I think I got'em

    they were both .php before I zipped them
  12. I don't know how to start the recording with the...

    I don't know how to start the recording with the datalogger yet. I will see if I can get the adx for you/
  13. Here's the bin from dyno day last January. It ran...

    Here's the bin from dyno day last January. It ran great on this tune for two weekends or so and then the car wouldn't run right on it anymore. It was too rich on the street.

    And here's the...
  14. I'm using the $8D-1227730-V1.xdf.php for some...

    I'm using the $8D-1227730-V1.xdf.php

    for some reason I was not allowed to upload it here. it said it was an invalid file.
  15. Here's todays bin.

    Here's todays bin.
  16. Why so many crazy variables on this car!? I'm...

    Why so many crazy variables on this car!? I'm tempted to set everything to zero and just run off of the fuel map alone and retune the map for it The only noticeably affective variable was the 'MAT...
  17. I mean it's hot as hell in Arizona and that's the...

    I mean it's hot as hell in Arizona and that's the last time I tuned the car and it's stayed hot until recently and now my tune is way off. My tune was never really too good to begin with.

    I did...
  18. Today I warmed up the car and it was lean cold,...

    Today I warmed up the car and it was lean cold, rich while warming up and just a little lean at operating temp. it was way lean cruising but if I stepped on the gas it was good 12.5-13.0 afr. But...
  19. From what I can tell my tunes are changing based...

    From what I can tell my tunes are changing based on weather conditions of the day. It's finally getting cooler in AZ and it's messing up my tune. probably has something to do with the fact that...
  20. The MS2 should be a pretty straight forward...

    The MS2 should be a pretty straight forward install on my vette, it doesn't need any aftermarket cam sensor setup and I've built a MS1 for my turbo Miata before. The tuning part on that ecu was a lot...
  21. I thought the same thing about the fuel pressure....

    I thought the same thing about the fuel pressure. I used to play with closed loop but closed loop would make my car run lean and then I learned I needed a heated o2 sensor but that did not fix it in...
  22. How is this helpful?

    How is this helpful?
  23. How is this helpful Dave W?

    How is this helpful Dave W?
  24. I've had the battery disconnected many times, I...

    I've had the battery disconnected many times, I just swapped the injectors from bank to bank because I have my wideband on the passenger side and narrow band on the drivers side and I wanted to see...
  25. What do you think I should check out? The fuel...

    What do you think I should check out? The fuel pressure goes up when I rev up the engine so I think the fuel pump should be good. Injectors all sound and feel like they are working. I took the...
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