My new D4BF in my JB500 is finally fully broken in. I thought it’d be a good idea to start tuning it.
First thing I’ve done is tightening the watergate actuator to boost 10lbs. That’s been great. I figured I should try to get a little extra fuel at the top end of boost. I spun the plunger to to be the deepest offset it could be and removed the nylon spacer. I put it all back together and all was fine and dandy for a good bit. As I was driving on the highway at about 60mph, I started losing boost and my EGT’s started rising rapidly. I let off the accelerator, stepped on it again, and had full power again. It felt like it went into a limp mode or something.
I did put it back to the factory settings and it happened again. Same as before too. I can let off the pedal, step on it again and have full power again. I did plug the overboost relief valve. I’m not really sure what’s going on. Anyone have an idea?
First thing I’ve done is tightening the watergate actuator to boost 10lbs. That’s been great. I figured I should try to get a little extra fuel at the top end of boost. I spun the plunger to to be the deepest offset it could be and removed the nylon spacer. I put it all back together and all was fine and dandy for a good bit. As I was driving on the highway at about 60mph, I started losing boost and my EGT’s started rising rapidly. I let off the accelerator, stepped on it again, and had full power again. It felt like it went into a limp mode or something.
I did put it back to the factory settings and it happened again. Same as before too. I can let off the pedal, step on it again and have full power again. I did plug the overboost relief valve. I’m not really sure what’s going on. Anyone have an idea?