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Rough Idle
Guys... need some help with this one...
Backstory:
2013 BRZ rebuilt title. Bought the car 5 years ago. Showing 87K on the motor. Ran and drove fine. I bought the car as a "father son" project. I taught my kids to drive it (manual). We put about 1K miles on it (really stretching that number to be honest) and then started working on the car. Fast forward to 4.5 years later, sons have 0 interest in helping dad.. and I have the itch to race... so I put the car back together. Over the past 4.5 years, I have started the car and let it idle for a bit but not what I should have.
So fast forward till now. Car is back together but idling rough. Moving it around in the shop, if you let off the gas, it will die. It idles about 450-500 rpm which seems low. When I started the project, it had about 3/4 tank of gas in it. I put a bottle seafoam in it. I also just did a oil change with full synthetic. It also recommend putting a couple ounces in the oil so I did that as well. I do have the magic black box thing on there but I am also getting a CEL. Nothing was done motor wise to the car since it sat. I did put in a new battery last week. That is really it.
I have a nice Snap-On computer (2 actually) and both are saying "cant communicate with vehicle". Something about it is not getting enough voltage from the car? I am not sure there so I can't check the CEL codes.
There is a gas station half a mile from my shop. I just ran it down there (first time on road in almost 5 years). It is a straight shot and speed limit is 45. It did fine going. As I slow down to get in the turning lane, it dies. Fire it up, pull in and as I am pulling to the pump, dies. I put just shy of 5 gallons in it. Leave and it seems okay. Coming back (up to temp now) I try to let it stretch its legs some and notice it wont really go over 4K RPM. That does not seem right when redline is what, 6.5K? I pull back into my shop and it bogs down but does not die. Pull up to the bay door, dies.
Any ideas? Sucks I cant get the computer to read the CEL's. I thought about the MAF sensor but that guy is a $100 gamble. I tried cleaning the throttle body with some throttle body cleaner.
So, I thought I would ask the experts. Let me know if you have any ideas!
-Jason
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