Quote:
Originally Posted by brianhj
@ sales@delicioustuning.com
@ DeliciousTuning
I took a log of the hesitation/stuttering I'm getting below 2k RPM and sometimes even above 2k.
69mm pulley, 93 right now (usually E85), 8.83 update, stock internals and exhaust and intake |
This is EXACTLY the same issue I am having but my advanced multiplier has gone down as far as .20. Gets rich for a second, leans way out.. and then comes back down..
I just pulled the supercharger and completely disassembled it, cleaned it, and inspected it. Replaced the seals and put it all back together. New brass elbows, new spark plugs and flushed the port injectors.
I disconnected the evap system to make sure that wasn't causing a problem. Checked the PCV system and that is fine and so is the brake booster.
I replaced the o ring where the bypass goes into the lower manifold with a larger one because there was a small vacuum leak coming from there.
I am 100% positive I don't have a vacuum leak. The only leak I have is from the butterfly bypass valve shaft as it passes through the casting because there is no seal there. This leak is SUPER small.
If you are looking for a vacuum leak the best way I found was to run TorquePro on a android tablet. display AFR as a graph over time and spray starter fluid around all the fittings. The engine won't fluctuate but the AFR will dip pretty far.
If you figure out the problem I would love to know what you did. I am lost and ready run the car into a wall!!