Ben824
NAXJA Forum User
- Location
- Woodstock, GA
97 XJ Country Auto 4x4 3.5" RE Lift on 33x12.50 KM2s
Engine has basic bolt on mods, K&N cold air intake, 99+ Mopar intake manifold, Banks header, 703 injectors, Magnaflow high flow cat, Flowmaster 50 series muffler.
My 97 has had this issue for years but now I feel like it happens much more easily than before. In the beginning days of the issue it only happened at highway speeds but now its happens as slow as 35 MPH under load.
Whenever I am under the slightest load and deep into the accelerator, my HVAC controls default to defrost. This happens even with the system off and just the force of the wind outside hitting the front of the Jeep and forcing through the HVAC system.
I have done a visual check over most of the vacuum system finding no visual leaks. I had the HVAC box out recently to change my heater core and did a bench test with a vacuum pump and it held pressure, though the defrost vent flap for the side window defrost vents didn't like to close which makes sense since they always seem to blow air no matter the setting.
I looked over my vacuum canister and it seems good. I am scratching my head here and its getting annoying to have this issue.
Anyone got any suggestions?
Engine has basic bolt on mods, K&N cold air intake, 99+ Mopar intake manifold, Banks header, 703 injectors, Magnaflow high flow cat, Flowmaster 50 series muffler.
My 97 has had this issue for years but now I feel like it happens much more easily than before. In the beginning days of the issue it only happened at highway speeds but now its happens as slow as 35 MPH under load.
Whenever I am under the slightest load and deep into the accelerator, my HVAC controls default to defrost. This happens even with the system off and just the force of the wind outside hitting the front of the Jeep and forcing through the HVAC system.
I have done a visual check over most of the vacuum system finding no visual leaks. I had the HVAC box out recently to change my heater core and did a bench test with a vacuum pump and it held pressure, though the defrost vent flap for the side window defrost vents didn't like to close which makes sense since they always seem to blow air no matter the setting.
I looked over my vacuum canister and it seems good. I am scratching my head here and its getting annoying to have this issue.
Anyone got any suggestions?