Okay guys, so I have a 1999 Honda Civic D16Y7 1.6L NA 5 Speed Manual -
HUNDREDS of dollars later and I am still chasing this problem. I really need someone smart on this one. I have an idle issue that I just can’t figure out whatsoever. I start the car and it idles good then it travels up and down right after you give it gas. The only check engine light is for an oxygen sensor due to the aftermarket exhaust. Sensor 1 Bank 2.
I have replaced:
Idle air control valve. (Brand new)
Radiator (Brand new)
Flushed and bled the cooling system after a good pressure test.
New plugs, wires, cap, and rotor.
New intake manifold gasket.
New OEM fuel injectors.
New MAP Sensor. [Brand new]
New TPS. [Brand new]
New fuel filter.
New coolant/vacuum lines.
New tight good clamps everywhere.
Tried a different throttle body from a junkyard no fix with oem sensors.
Sprayed the entire engine down for a vacuum leak several times, nothing.
Tried another ecu from a d16y7.
Seafoamed/cleaned the manifold off the car.
New throttlebody gasket.
Proper coolant mixtures.
Torqued every exterior bolt to spec.
I am STUMPED and my mechanic is as well. Any help would be greatly appreciated. I absolutely love this car and would love to give it the attention it deserves if I can get it running right enough to drive
HUNDREDS of dollars later and I am still chasing this problem. I really need someone smart on this one. I have an idle issue that I just can’t figure out whatsoever. I start the car and it idles good then it travels up and down right after you give it gas. The only check engine light is for an oxygen sensor due to the aftermarket exhaust. Sensor 1 Bank 2.
I have replaced:
Idle air control valve. (Brand new)
Radiator (Brand new)
Flushed and bled the cooling system after a good pressure test.
New plugs, wires, cap, and rotor.
New intake manifold gasket.
New OEM fuel injectors.
New MAP Sensor. [Brand new]
New TPS. [Brand new]
New fuel filter.
New coolant/vacuum lines.
New tight good clamps everywhere.
Tried a different throttle body from a junkyard no fix with oem sensors.
Sprayed the entire engine down for a vacuum leak several times, nothing.
Tried another ecu from a d16y7.
Seafoamed/cleaned the manifold off the car.
New throttlebody gasket.
Proper coolant mixtures.
Torqued every exterior bolt to spec.
I am STUMPED and my mechanic is as well. Any help would be greatly appreciated. I absolutely love this car and would love to give it the attention it deserves if I can get it running right enough to drive