12200411 - A Few General Questions

[dave w]

If the online parts information is correct, the 2002 Express Van 5.7 liter (Vin R) uses AC Delco part # AFS105 for the upstream (before catalytic converter) Heated O2 Sensors (HO2S). I would use the AFS105 HO2S for a TPI system controlled by the 12200411 PCM. I'm sure aftermarket brands can be cross referenced to the AFS105 part number. I'm sure the aftermarket HO2S are competitively priced compared to the AFS105 pricing. The 12200411 uses 4 HO2S 1 upstream, 1 downstream on each side of the engine to make a total of 4 HO2S. The two downstream HO2S can be eliminated with custom PCM Flash Programming.


The MAF is optional with the 12200411 PCM, but custom Flash Programming is required. The 2002 Express Van 5.7 liter (VIN R) used a 3 Wire MAF Sensor. The LS 5.3 liter MAF Sensor is 5 wire, a segment swap of the 5.3 liter MAF Parameters will need to be done for the 1200411 PCM Flash Programming.

dave w

[ezobens]

If the online parts information is correct, the 2002 Express Van 5.7 liter (Vin R) uses AC Delco part # AFS105 for the upstream (before catalytic converter) Heated O2 Sensors (HO2S). I would use the AFS105 HO2S for a TPI system controlled by the 12200411 PCM. I'm sure aftermarket brands can be cross referenced to the AFS105 part number. I'm sure the aftermarket HO2S are competitively priced compared to the AFS105 pricing. The 12200411 uses 4 HO2S 1 upstream, 1 downstream on each side of the engine to make a total of 4 HO2S. The two downstream HO2S can be eliminated with custom PCM Flash Programming.


The MAF is optional with the 12200411 PCM, but custom Flash Programming is required. The 2002 Express Van 5.7 liter (VIN R) used a 3 Wire MAF Sensor. The LS 5.3 liter MAF Sensor is 5 wire, a segment swap of the 5.3 liter MAF Parameters will need to be done for the 1200411 PCM Flash Programming.

dave w

Thank you Dave!
Seems there are quite a few vendors selling these O2 sensors and they are all around $30-$40 a pop. Are any brand(s) more desirable than the other? I'm thinking I should stay with Delco, Delphi, Denso, Bosch or ?? Any brands more reliable than the other?

For the MAF, I won't be running the 3-wire as I'd rather have the air temp sensor with the MAF vs in the plenum of the intake. I'm trying to decide if the 85mm Corvette 5-wire MAF or the 'Blade' style 5-wire MAF is the better way to go? Again, my main concern is reliability and ease of installation. Are the Blade style more temperamental than the traditional round housing MAFs?

Thanks again!
Elm

[mecanicman]

With a 71mm throttle body a 85mm maf will not be your restriction. If by blade you the ls7 card style maf, they have a tendancy to drop out at low airflow in larger tubes making idle a challenge sometimes. If your installation is made easiar by the card style maf, just use a reasonable size intake tube and put it in straight section of the tube, not right after an elbow. Either will work fine.

[dave w]

For the MAF, I won't be running the 3-wire as I'd rather have the air temp sensor with the MAF vs in the plenum of the intake. I'm trying to decide if the 85mm Corvette 5-wire MAF or the 'Blade' style 5-wire MAF is the better way to go? Again, my main concern is reliability and ease of installation. Are the Blade style more temperamental than the traditional round housing MAFs?

I would use the Corvette MAF. Make sure the correct MAF Grams vs. Frequency is programmed in the computer.

dave w

[ezobens]

I would use the Corvette MAF. Make sure the correct MAF Grams vs. Frequency is programmed in the computer.

dave w

Awesome info-
Thank you!
Elm