Long post- get your coffee, I just want to make sure I put it all out there.
I have been wrenching on the side for about 40 yrs. so I do know a little bit. I am working on an '04 civic DX with the 1.7 A1 engine. Customer had overheat and cracked the head. Price was cheaper to buy a used engine so we did. Install went fine other than the replacement engine was NON EGR. I swaped the egr assembly from the blown motor to the replacement. I paid attention to the EGR passages in the head and made sure it was good and clear. Car ran like a Honda should for a day and a half. EGR FLOW DTC showed up and we figured that since the head and the asembly were clean the valve itself or the pressure diff sensor was bad..Bought a new EGR valve and reset the light using my Innova 3140 code reader. Light came back on. Question is why? When I swaped engines I used the intake from the blown engine and I cleaned the passages in the plate that attaches to the head. I did use some "ultra copper" on the crush gasket, Is it possible that these passages are that sensitive to flow and I may have got some sealant in the "slot"? Any help would be greatly appreciated.
and BTW THANKS TO RHCP0801 FOR FIXING THE POSTING ISSUE!!
I have been wrenching on the side for about 40 yrs. so I do know a little bit. I am working on an '04 civic DX with the 1.7 A1 engine. Customer had overheat and cracked the head. Price was cheaper to buy a used engine so we did. Install went fine other than the replacement engine was NON EGR. I swaped the egr assembly from the blown motor to the replacement. I paid attention to the EGR passages in the head and made sure it was good and clear. Car ran like a Honda should for a day and a half. EGR FLOW DTC showed up and we figured that since the head and the asembly were clean the valve itself or the pressure diff sensor was bad..Bought a new EGR valve and reset the light using my Innova 3140 code reader. Light came back on. Question is why? When I swaped engines I used the intake from the blown engine and I cleaned the passages in the plate that attaches to the head. I did use some "ultra copper" on the crush gasket, Is it possible that these passages are that sensitive to flow and I may have got some sealant in the "slot"? Any help would be greatly appreciated.
and BTW THANKS TO RHCP0801 FOR FIXING THE POSTING ISSUE!!