DieselDetroit
I'm Awesome
97 Tahoe 2dr 5700/4l60e
315,000 kms
Symptoms:
- misfire consistently under LOW load (lightly pressing accelerator) - makes me suspect fueling, injector, fuel filter, pump, etc
- goes away under high load or when accelerator pedal is completely left alone (coasting downhill or cruising uphill) - makes me suspect same as above
- flat stretches are the worst for misfiring
- I'm losing torque converter lockup because of it.... read somewhere historic misfires prevent tcc lockup
- here's the weird thing, check engine light is off!!! Today it blinked for the first time In 5000 miles..... and it is very rare. No active codes. No stored codes???? Wtf!! It's an OBD2, shouldn't it be stored even after the ignition is turned off
- I thought I saw coolant condensed in the tailpipe (orange crystals), I 'think' I smell coolant but my mechanic friend said it's just fuel.... suspecting lower intake gaskets?
My question is how to verify this without codes? I want to see what these misfire codes are....
315,000 kms
Symptoms:
- misfire consistently under LOW load (lightly pressing accelerator) - makes me suspect fueling, injector, fuel filter, pump, etc
- goes away under high load or when accelerator pedal is completely left alone (coasting downhill or cruising uphill) - makes me suspect same as above
- flat stretches are the worst for misfiring
- I'm losing torque converter lockup because of it.... read somewhere historic misfires prevent tcc lockup
- here's the weird thing, check engine light is off!!! Today it blinked for the first time In 5000 miles..... and it is very rare. No active codes. No stored codes???? Wtf!! It's an OBD2, shouldn't it be stored even after the ignition is turned off
- I thought I saw coolant condensed in the tailpipe (orange crystals), I 'think' I smell coolant but my mechanic friend said it's just fuel.... suspecting lower intake gaskets?
My question is how to verify this without codes? I want to see what these misfire codes are....
Last edited: