SBC TPI 0411 24X conversioin

[dave w]

The SBC firing order is 1-8-4-3-6-5-7-2.

The 5.3 liter (LSx) firing order is 1-8-7-2-6-5-4-3.

It's my understanding changing the '0411 bank assignments in the flash, DOES NOT change firing order. The '0411 24x firing order can be changed by re-pinning the Injector and Coil Pack wiring.

dave w

[Fast355]

The SBC firing order is 1-8-4-3-6-5-7-2.

The 5.3 liter (LSx) firing order is 1-8-7-2-6-5-4-3.

It's my understanding changing the '0411 bank assignments in the flash, DOES NOT change firing order. The '0411 24x firing order can be changed by re-pinning the Injector and Coil Pack wiring.

dave w

BOTH need to be done. Injector bank assignment and diagnostic firing order need to be changed in the tune and both the injectors and coils need to be re-pinned at the PCM. Easy way to correct those is copy in the table values from a 5.7 Express van tune. I am running my 5.7 on a modified 6.0L tune in a 1 meg PCM (Green/Blue connectors).

[evilstuie]

BOTH need to be done. Injector bank assignment and diagnostic firing order need to be changed in the tune and both the injectors and coils need to be re-pinned at the PCM. Easy way to correct those is copy in the table values from a 5.7 Express van tune. I am running my 5.7 on a modified 6.0L tune in a 1 meg PCM (Green/Blue connectors).

Yeah both have been done.
Repinned the coils and injectors on the harness and reassigned the injector banks on the tune. The injector bank assignment is just for the o2 sensors, there's no way to change the firing order in the tune.

The dizzy could be out by a tooth or 2, but it should come up as a DTC if it's out of sync I think.

[Fast355]

Yeah both have been done.
Repinned the coils and injectors on the harness and reassigned the injector banks on the tune. The injector bank assignment is just for the o2 sensors, there's no way to change the firing order in the tune.

The dizzy could be out by a tooth or 2, but it should come up as a DTC if it's out of sync I think.

You are WRONG on the being able to change the firing order in the tune. It is there plain as day in both HP Tuners and TunerCats OBDII. It is in the diagnostic tab and tells the PCM in what order the cylinders fire for misfire monitoring and cylinder specific DTCs.

[evilstuie]

You are WRONG on the being able to change the firing order in the tune. It is there plain as day in both HP Tuners and TunerCats OBDII. It is in the diagnostic tab and tells the PCM in what order the cylinders fire for misfire monitoring and cylinder specific DTCs.

Oh ok. I've been using EFI Live and TunerPro up to this point and they never had anything to change the firing order. As I said HP tuners is still on its way to me so I haven't had a play around yet.

Regardless I did it the long way and repinned everything.

Is it possible the PCM needs the CASE relearn procedure. From what I remember reading it is supposed to sync the cam and crank sensors yes? But only works if they're already within 2degrees?

[dave w]

My apologies, I thought the topic was SBC 24x '0411. It appears the thread has wondered to the SBC 4x '0411?

I have experience with the SBC 4x '0411 conversion. I use the FACTORY 2002 Express Van L31 SBC 4x '0411 wiring diagrams, FACTORY L31 Cam / Crank sensors and the FACTORY Ignition Coil / Module on the systems I've worked with. It's a good parts combination / foundation to use for the SBC 4x '0411 conversion. The SBC 4x "0411 initial cam / crank alignment MUST BE 100% "SPOT ON", or "HEADACHES" will result. I use the 2002 Express Van Flash, OS 12212156 with the SBC 4x '0411 conversion.

My daily driver is a 1999 S10 / upgraded with a Stock L31 / using the EFI Connection 24x crank trigger system. I'm using the FACTORY 2002 LM7 wiring diagram, modified for the SBC 24x system. I often use my daily driver to "Test" an '0411 PCM. When testing an '0411, I use the same flash the daily driver '0411 has with the CASE disabled in the "Test" flash. I haven't noticed any drive-ability issues with the CASE disabled flash. I'm using a "EXTENSIVELY" modified Drive by Cable LM7 5.3 liter OS 12212156 Flash for my SBC 24x conversion.

dave w

[evilstuie]

You are WRONG on the being able to change the firing order in the tune. It is there plain as day in both HP Tuners and TunerCats OBDII. It is in the diagnostic tab and tells the PCM in what order the cylinders fire for misfire monitoring and cylinder specific DTCs.

Hey Fast355,
I just downloaded the VCM editor for HP Tuners and found it as you said on the diag tab. Wow, this could be an issue if both have been done then essentially it's just cancelled the change out.
But the TunerPro XDF I was using didn't have an option for firing order, so I assume the firing order is still set to LS1 and repinning has corrected the firing order.

[Fast355]

Hey Fast355,
I just downloaded the VCM editor for HP Tuners and found it as you said on the diag tab. Wow, this could be an issue if both have been done then essentially it's just cancelled the change out.
But the TunerPro XDF I was using didn't have an option for firing order, so I assume the firing order is still set to LS1 and repinning has corrected the firing order.

Actually they BOTH need to be done. The firing order needs to be re-pinned to the correct order and the firing order in the diagnostics tab should be changed. The firing order will not put the injectors and coils into the correct order, but it will correct the firing order in the tune so that the PCM will flag the correct cylinder when you have an injector/coil/misfire related code. If you do not correct the diagnostic side, the PCM will flag the wrong cylinder and you will go crazy trying to diagnose say a p0307 misfire, on cylinder 7 it would actually be cylinder 4 with the problem.