My son Tony 5.3 Chevy trouble

Robin Lawrence · 09-10-2019, 10:28 AM

When swapping these types of ECU's it's common to modify the Air Intake leading to and from the Mass Air Meter. this can change the calibration of the mass air. Depending on the ECU it can fail the mass air table and revert to the VE table. The transmission should not effect the function of the mass air meter. Transmission issues typically are incorrect harness or mis matched ECU calibration to the 4L60E.

The mass air issue can be tuned in the MAF transfer function or change the operating system to speed density and tune using the VE table.

I work for Holley so my suggestion is the Terminator X Max. About $1400 complete and has trans control.

Robin

Ed Wright · 09-10-2019, 02:47 PM

I work with this stuff every day. The MAF for the 5.3L truck should be the 85mm one piece black plastic unit, with the five pin wiring connector. Often, engine swaps end up with the older 3 piece MAF, which is calibrated a good bit differently.
With a scan tool, you should see 5 to 8 grams per second air flow from the MAF. Depending on idle speed.Normally, at 750/800 RPM, 8 grams per second is normal for a stock 5.3L to 5.7L engine.

Unplug the MAF, it does not run in true Speed Density Mode, it runs in Backup Fuel Mode. Separate tables in the ECU for that mode. If that ECU even has V.E. tables, there is a binary switch that needs reset (Usually $00 to $02) to run in true V.E. Mode.

Many of those late truck ECUs do not even have VE fuel tables. Just a Backup Fuel Table.

09-10-2019, 10:28 AM	#1
Robin Lawrence Sponsor Join Date: Jan 2002 Location: Galesburg IL. Posts: 175 Likes: 248 Liked 705 Times in 119 Posts	Re: My son Tony 5.3 Chevy trouble When swapping these types of ECU's it's common to modify the Air Intake leading to and from the Mass Air Meter. this can change the calibration of the mass air. Depending on the ECU it can fail the mass air table and revert to the VE table. The transmission should not effect the function of the mass air meter. Transmission issues typically are incorrect harness or mis matched ECU calibration to the 4L60E. The mass air issue can be tuned in the MAF transfer function or change the operating system to speed density and tune using the VE table. I work for Holley so my suggestion is the Terminator X Max. About $1400 complete and has trans control. Robin __________________ STK 308 SS 3088

09-10-2019, 02:47 PM	#2
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: My son Tony 5.3 Chevy trouble I work with this stuff every day. The MAF for the 5.3L truck should be the 85mm one piece black plastic unit, with the five pin wiring connector. Often, engine swaps end up with the older 3 piece MAF, which is calibrated a good bit differently. With a scan tool, you should see 5 to 8 grams per second air flow from the MAF. Depending on idle speed.Normally, at 750/800 RPM, 8 grams per second is normal for a stock 5.3L to 5.7L engine. Unplug the MAF, it does not run in true Speed Density Mode, it runs in Backup Fuel Mode. Separate tables in the ECU for that mode. If that ECU even has V.E. tables, there is a binary switch that needs reset (Usually $00 to $02) to run in true V.E. Mode. Many of those late truck ECUs do not even have VE fuel tables. Just a Backup Fuel Table. __________________ Ed Wright 4156 SS/JA