262's 85 Fiero SE LX9 F23 swap thread lots of pics

[Xnke]

OBD1.5 has 2 bar map support, as does nA$1. I think the 3800 has a different firing order, but they aren't sequential injection are they?

[ericjon262]

it might actually work, there are switches in the 3800 code for crank sensor resolution, and for engine type. the big thing I am after is 2 bar map support.




I'm also interested in getting a true coil per cylinder setup going as well, using stock code. that will require direct input of the 7x(3x) signal to the PCM, this will take a little more work though.

[Xnke]

Seeing as the L67 has a completely different triggering scheme it wouldn't have worked even if it did flash.

What where you trying to accomplish by running a 3500 on the 3800SC program? Less tuning work? Would only make for more tuning work in my opinion, iron heads/aluminum heads, different chamber design, different sensor config, ect.

[ericjon262]

tried flashing the L67 bin, no dice, DHP says "file not compatible with destination PCM" I'm gonna try and pick up an L67 PCM later this week and give it another go.

[ericjon262]

for the past week or so, I've been troubleshooting the fuel pump relay circuit, SES light, brake lights, head lights, and cooling fan. good news, all but one are now fixed! brake lights was the turn/hazard switch, headlights and cooling fan was a ground. the fuel pump relay was a little more confusing as I had checked the pins on the PCM harness a couple of times and "knew" it was right... it wasn't... :crazy: I must have been tired, or drunk, or some combination of the two when I did it, because I had the relay trigger in pin 2 on the clear connector when it should have been on pin 3... DOH! works like a champ now. the SES light might have a bad bulb after all. I re checked the C203, and show 0V now. there is a +12v wire in pin b next to the ses light, so I wonder if maybe I had probed B instead of C. I've been doing all of this troubleshooting after getting off on the mid shift, so sleep deprivation has been a thing... I still have an oil leak, but it's not as bad as it was. I'm starting to wonder if it's the turbo oil feed or return. I'm gonna put it on a lift on my next day off and see if I can pinpoint the exact location of the leak and nip it in the bud. before I pass out tonight(day) I'm gonna see about making a new bin file for the tune based on a 3800 supercharged bin, so that tomorrow when I get off work I can try and light it off and see if a 3400 will run on a 3800 file. I'll post an update when it happens.

[ericjon262]

thanks, lots of tuning to do still, but at least it's running!

Sounds good.

[Purple pit]

Almost like an old friend stopping by for a visit.

[ericjon262]

it lives again!

https://youtu.be/j4UYc1i8LLA

[Kaiju Senso]

That must be why I changed the sensor, I used a 3400 wiring harness from an Alero.

[ericjon262]

what's worse, is that when the light came in for it, I bought an old style sensor, but returned it because the connectors are different...

[Kaiju Senso]

lol, everything I've done to the car, I've done at least twice...

I had this same issue with my build, I'm also surprised you made the same mistake! My issue was from mixing and matching 3400 intakes and throttle bodies.

Cam position sensor, I just plugged in a new, old style sensor. Bummer that I could have used my original sensor and saved the cash.

[ericjon262]

Found out what was wrong with my cam position sensor... on older 3x00's, pins a and c are power and ground. on 3500(LX9) power and ground are a and b. I'm using the 3500 sensor, but I had it wired as a 3x00, so the signal was aligned to ground, and the PCM was just seeing a ground the whole time.

[ericjon262]

Shocked that you missed the lack of idle air port. Just doesn't seem like you.

lol, everything I've done to the car, I've done at least twice...

[Purple pit]

Shocked that you missed the lack of idle air port. Just doesn't seem like you.