Multiport vs TBI, and DIS conversion.

[robertisaar]

i'm not sure if that is a 0D, but the 93 PCM is a E6, which i just happened to have made a XDF for in the last two weeks or so. the hack was VERY well documented and it took me a solid 4 days for the XDF...

i also have a ridiculously detailed 0D XDF, but i didn't make it.

[Canyonero]

Is the 16197427 a direct swap for the '7747 and '8062?

[Canyonero]

I did a little googling, looks doable. I'll bring in a '7427 and solder in a socket, and figure out what it takes to re-pin my harness.

[Canyonero]

I think I've had a breakthrough. Seems the EST bypass of the DIS works opposite of how it did with the distributor. The times I was driving it before, the bypass circuit was CLOSED. Before, that meant that EST was NOT being bypassed, now it means that it is.

I had the timing light on with the circuit closed and revved the engine, the timing was rock solid, no advancement. When I opened the circuit, the timing smoothly advanced with the revs as it should. I did a very brief test drive, and the knock was gone. I think I might need to tweak the initial advance a touch, but we're well on our way.

But now the ECU is giving me a CEL because the EST is bypassed, even though it really isn't.

[robertisaar]

disable the code and fogetabouit?

[Canyonero]

That was my plan.

[Canyonero]

I'm having issue with it dying when I clutch it. It doesn't die all the time, but the revs will drop way low. Is there any way to verify the correct operation of the EST? I just know that my timing is dead solid with the connector plugged in, and it advances smoothly with the bypass disconnected. Is it advancing correctly? I don't know.

[robertisaar]

could be throttle follower issues for that problem.

[Canyonero]

No, I just got ahead of myself again. The DIS is not working properly, it's just more drivable on bypass. It's been snowing today, I think my little car will have a tough time getting around now. I'm going to reconnect the distributor this evening so I can drive it again.

Perhaps a stupid question now, but should the ESC module still be used with DIS?

[robertisaar]

the knock filter? that should be fine. it's set up by bore size and type of valvetrain, neither of which have been changed between the DIS and dizzy setups, right?

[Canyonero]

Well, the bore size has changed since I swapped the engine, but not since I switched to DIS.

[robertisaar]

then i would say since the problem is only present with the DIS setup, i would say the filter is fine.

[Canyonero]

There are only five wires coming off that thing (other than 12v+, GND, and crank sensor pair), those are:

PPL/WHT - EST Ref Hi
BLK/RED - EST Ref Lo
TAN/BLK - EST Bypass
WHT - Tach
WHT - EST Control

I'm sure I have the white is right, because my tach works and I traced it on a DIS harness.

I just don't get what the issue is...

I found the $0D BIN for a 4.3L 5-speed, just downloaded everything off moates and checked for the manual tranny switch. The only one I found is BJFD.

[edit: Double checked the wiring, it is correct. I'll try another ICM...]

[Canyonero]

Tried another ICM, same thing. The timing doesn't move with the bypass closed. Revs up and otherwise runs great, until the engine is put under load...

[robertisaar]

i have 3 manual trans BINs for 0D:

BDXA
BHFM
BJFD