September 15, 2019, 04:25:50 PM

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Messages - digitalsolo

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61
Build Threads / Re: LT1 in an 85 GSL
« on: August 10, 2019, 05:24:45 PM »
I prepped and had Maaco shoot my FC at one point and it was actually pretty good (for a couple hundred bucks).   I'd say go for it.

62
Ahhh, the joys of custom, combined with caring about doing it correctly.   Nice work Joel!

63
Build Threads / Re: Blake's 1965 Mustang Project
« on: August 09, 2019, 05:20:17 PM »
Yep!

64
Build Threads / Re: Blake's 1965 Mustang Project
« on: August 09, 2019, 11:31:33 AM »
Hitting AEM up about the flex fuel sensor.   I may throw a pull up resistor on the output and see if that helps, the ECU input is up to 18V, so it should be a-ok, I don't have any other brilliant plans as far as that goes, so if that does't work, I'm going to build an Arduino to read it, and see if the sensors are outputting good/clean data.   Very weird.

This weekend will be the "replace that damn cam sensor olympics" which will suck.  LOL

65
General Tech / Re: Leaking fuel tank need some options
« on: August 08, 2019, 09:31:39 PM »
I literally laughed out loud at that comment.

66
General Tech / Re: Leaking fuel tank need some options
« on: August 08, 2019, 05:45:11 PM »
Iíve used the Permatex brand very successfully.

67
General Tech / Re: Leaking fuel tank need some options
« on: August 08, 2019, 12:48:34 PM »
Just seal the leak area with some fuel tank epoxy and recoat it?    If the welds are physically strong, and it just has a crack, I'd see zero issue with that, and you can do it on the car.  Just drain the tank first and let it cure for a day or two before refilling.

68
Build Threads / Re: White 94 FD LS2/L92 build thread
« on: August 08, 2019, 11:36:26 AM »
Ugh, I hadn't noticed that.   Same color, same spoiler, same wheels, same black "spats".   :(

edit:  Both cars had a handicapped California plate, too.

69
Road Racing/Autocross / Re: "Doda" '93 FD NASA TT Build
« on: August 08, 2019, 09:15:38 AM »
As someone who is looking to do some driving events, I really appreciate the thorough rundown.

Also, the best quote in this post is, by far: "flopping around like a limp salamander".

70
Road Racing/Autocross / Re: Fuel slosh.... need help/opinions
« on: August 07, 2019, 10:17:02 PM »
Oof, that'll do it.

71
Build Threads / Re: Blake's 1965 Mustang Project
« on: August 07, 2019, 10:14:39 PM »
Yeah, it's a royal pain.

Today I tied both ECU inputs to the driver side sensor.   Both read/follow exactly, so the ECU is fine (thank goodness...).    The wiring tests good, so it kinda has to be the sensor.   I ordered a new sensor (they're cheap) and hopefully I'll put it in this weekend.    The sucky part is that's like a 6 hour job.    Lord I hope that fixes it.

The car does run MUCH better with both sensors "working".   Much smoother.   That said, I can't really run it on only the driver side sensor;  when I spoof it, the passenger bank runs about 10-12% lean when the cam moves, so it's over-advancing with the same amount of duty cycle (which is fine, it's supposed to have a feedback PID loop for control).   That said, I've always noticed bank 1 (passenger bank on this motor) is a little leaner than driver, and I think that's why (or at least some of why).

The flex fuel sensor didn't work however.   Tried multiple inputs and new wiring.   Zero progress.   I'm about out of ideas there.

72
Build Threads / Re: Blake's 1965 Mustang Project
« on: August 07, 2019, 02:44:02 PM »
Okay, so an update on the sensor issues.

I've replaced the flex fuel sensor with a brand new one (borrowed from BeasTT) and no change.  I did notice that I see some random frequency data when the fuel pumps spin up and the sensor is connected.   As soon as the car starts, that data is gone.   Interesting...   That brings me to my next theory:  the long run of wiring from front/rear is getting noise and breaking the signal somehow.    The sensor is separately grounded (as it is supposed to be) so it's not a ground issue (at least not directly).    I'm going to do a few things to try and sort this:

1.  Running a new ground from the battery directly to the "ground bus bar" for my ECU/sensors/etc. in the dash.   Right now each grounds to the chassis with a welded stud.   That should be fine (and testing shows no potential between them) but hey, it can't hurt anything.
2.  Going to connect the flex fuel sensor directly to the ECU with a short lead.    This will tell me if I'm getting noise/loss/etc. in the path.
3.  This isn't related, but I'm going to run a new lead to the trunk (2-3 actually) for staging my fuel pumps to drop fuel temperatures.   I'm also replacing my giant 450lph lift pump with a 190lph (which should be plenty for a lift pump).

That's the fuel system side.     I'm hopeful that the flex will start working.   If it doesn't, I'll try it on another digital input.    AEM did get me some info, namely that each digital input is its own transistor, so even killing one shouldn't hurt the others.

Next up, cam sensors.   Specifically intake cam sensors.   My driver side works now.   I have no idea why it works.   I unplugged it, poked around at it a bit, and plugged it back in, and boom.  Works.   I'd blame a harness problem, but I had unplugged it before, tested continuity, voltage, etc.  It was fine.  Plugged it in, no workie.   Did it again looking at other stuff, plugged it in and now it works every time.   Weird....

Passenger side harness reads proper, but there is no data in the ECU.   I need an oscilloscope to test it further, so for now I'm going to get both banks to read off the driver side sensor to get VVT feedback working (the other 3 cams read within .1* of each other, so I feel comfortable cloning both intakes for now).   I'll get it scoped at some point and replace the sensor if I have to, though that requires pulling the engine forward a few inches because it's right against the firewall.  :(    No fun.

Hopefully I can get flex working, and hopefully the cam sensor weirdness is done (mostly) and I can start getting the car to behave properly.   These are really the last few major things stopping me from really being able to dial it in and start to hammer on it more.

73
Build Threads / Re: LT1 in an 85 GSL
« on: August 07, 2019, 02:28:04 PM »
That looks like a ton of work to make that bodykit fit up.   It's coming out pretty well though!

74
Build Threads / Re: Four's 1JZ swapped FD Project - Rx7upra
« on: August 06, 2019, 08:09:56 PM »
Thatís a good looking engine bay

75
Build Threads / Re: 57 Buick Special GMT900 AWD Frame swap
« on: August 05, 2019, 11:19:32 AM »
I think it's about the appropriate amount of ghetto.  :D

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