chadzeilenga
Active member
Hi All,
As most of you know, I recently replaced the 3.0L 6G72 in my 89 Montero due to a series of discoveries after my HG issue. The replacement engine is now up and running and I have one issue that I'm still fighting, so I'm diving into the Powertrain Diagnostic Procedure to get to the bottom of it.
First, a description of the problem:
The Montero starts up and idles great, no CEL and has no driveability issues when cold. Once warmed up there is an intermittent issue that appears as a random miss/no fuel while under load or sometimes an abrupt shutdown while stopped in-gear at a busy intersection (like tonight). Underhood I wiggled all of my connections and no change and after ~15min of periodic cranking, it fired and I drove it home. I have done the following since troubleshooting this issue: New fuel filter, swapped FPR, Coil & Power Transistor from old engine.
Second, some diagnostic questions:
- Since my problem happens while I'm driving or at least warmed up, should I start with the driveability section, or just work through the no-start tests for good measure?
- What is the best way to connect to the ECU while doing the diagnostic tests with an Ohmeter?
As most of you know, I recently replaced the 3.0L 6G72 in my 89 Montero due to a series of discoveries after my HG issue. The replacement engine is now up and running and I have one issue that I'm still fighting, so I'm diving into the Powertrain Diagnostic Procedure to get to the bottom of it.
First, a description of the problem:
The Montero starts up and idles great, no CEL and has no driveability issues when cold. Once warmed up there is an intermittent issue that appears as a random miss/no fuel while under load or sometimes an abrupt shutdown while stopped in-gear at a busy intersection (like tonight). Underhood I wiggled all of my connections and no change and after ~15min of periodic cranking, it fired and I drove it home. I have done the following since troubleshooting this issue: New fuel filter, swapped FPR, Coil & Power Transistor from old engine.
Second, some diagnostic questions:
- Since my problem happens while I'm driving or at least warmed up, should I start with the driveability section, or just work through the no-start tests for good measure?
- What is the best way to connect to the ECU while doing the diagnostic tests with an Ohmeter?
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