I'm doing a transplant of an 01 DMAX/ALLI into my 95 SUBURBAN. While the engine is out I'm doing the head gaskets because the passenger side in the rear had a slight leak in between the block and the gasket. When I tore it down all the injector tips and cylinders were uniform except for #2 which was rather wet and clean on half the piston dome. I checked the balance rates before I pulled it and all were within+/-.4 except 2(-2.43) and 5(2.41). the engine also had a knock in it occasionally and a BAD lope idle. I have a FPR coming for the lope idle as it was fluctuating about 1700 PSI at idle. My main question though is in regards to the injectors. Should I replace them or not? They were done at 30K under warranty, and the truck had 162K when I pulled it down. I already have the heads off and tore down, and figure now is the time to replace the injectors. My obstacle right now is money is running short currently as I have had NO work in almost 3 months.
I pulled the injector nozzles off and cleaned them all and re-assemblked them. #2 was DEFINATELY leaking down as even the pressure from a spray can of carb cleaner blead right past the seat when I checked it, and #5 seemed MUCH looser than the rest when I pulled the needle valve out of the nozzle in it. After soaking them all in cleaner and re-assembling though none were leaking and all have a good spray pattern with a fine mist when I checked them with spray carb cleaner. I found a shop to test them for 3-4 bucks each, or PENSAOLA has theres for $149 each. Should I have them tested or just replace them due to milage?
I pulled the injector nozzles off and cleaned them all and re-assemblked them. #2 was DEFINATELY leaking down as even the pressure from a spray can of carb cleaner blead right past the seat when I checked it, and #5 seemed MUCH looser than the rest when I pulled the needle valve out of the nozzle in it. After soaking them all in cleaner and re-assembling though none were leaking and all have a good spray pattern with a fine mist when I checked them with spray carb cleaner. I found a shop to test them for 3-4 bucks each, or PENSAOLA has theres for $149 each. Should I have them tested or just replace them due to milage?
