NERDY
07-26-2024, 07:42 AM
Hi everyone,
I've been troubleshooting a power issue with my 1994 Mitsubishi Mighty Max (6G72 engine) and wanted to share what I've done so far and seek some advice.
Steps Taken:
Valve Cover Gaskets: Replaced due to severe leakage.
Spark Plugs: Replaced to ensure proper ignition.
Cleaning: Thoroughly cleaned the MAF sensor, IACV, and intake.
Injectors: Replaced with injectors from a 3000GT (same engine type).
Fuel System: Verified no vacuum leaks by spraying carb cleaner around the engine bay.
MAF Sensor Replacement: Installed a Delphi AF10323 MAF sensor from O'Reilly's. The engine starts but dies after about 3 seconds with the new sensor. Disconnecting the MAF significantly improves performance, indicating the old MAF might be faulty.
checked intake tube: for rips and tears and found nothing.
Checked wiring: I inspected the wiring to the MAF and found no issues.
Issues/Theories:
The engine won't idle long enough for the ECU to retrain.
Suspect the new MAF sensor might be a dud.
The engine will run with the old MAF but won't go over 50 and has issues starting when the truck is at running temp.
Unplugging the MAF gives the truck significantly more power, it can hit 80 no problem. However it burns comical amounts of fuel and smells really bad.
Questions:
Has anyone experienced similar issues with replacing MAF sensors?
Could there be other underlying issues I should check?
Any advice or suggestions would be greatly appreciated. Thanks in advance!
I've been troubleshooting a power issue with my 1994 Mitsubishi Mighty Max (6G72 engine) and wanted to share what I've done so far and seek some advice.
Steps Taken:
Valve Cover Gaskets: Replaced due to severe leakage.
Spark Plugs: Replaced to ensure proper ignition.
Cleaning: Thoroughly cleaned the MAF sensor, IACV, and intake.
Injectors: Replaced with injectors from a 3000GT (same engine type).
Fuel System: Verified no vacuum leaks by spraying carb cleaner around the engine bay.
MAF Sensor Replacement: Installed a Delphi AF10323 MAF sensor from O'Reilly's. The engine starts but dies after about 3 seconds with the new sensor. Disconnecting the MAF significantly improves performance, indicating the old MAF might be faulty.
checked intake tube: for rips and tears and found nothing.
Checked wiring: I inspected the wiring to the MAF and found no issues.
Issues/Theories:
The engine won't idle long enough for the ECU to retrain.
Suspect the new MAF sensor might be a dud.
The engine will run with the old MAF but won't go over 50 and has issues starting when the truck is at running temp.
Unplugging the MAF gives the truck significantly more power, it can hit 80 no problem. However it burns comical amounts of fuel and smells really bad.
Questions:
Has anyone experienced similar issues with replacing MAF sensors?
Could there be other underlying issues I should check?
Any advice or suggestions would be greatly appreciated. Thanks in advance!