ok so daily drive my civic at 11lbs not one code problem anything. turn it up to 20 psi tonight to do some testing never made it to full boost and through codes for iacv and ckp I don't know what could cause this? Any had this happen?

96 civic
obd1 jumper
crome pro
basic piston rod b18b
ge intake manifold
76mm Blox tb

 

If you are not tuned specifically for up to 20psi, you're going to destroy this engine quickly, never mind any problem codes you're seeing.

Hell. Make sure you've tuned for even 11psi

 

It's been tuned for 2.5 bar run it with boost cut set at 21psi same setup for years just never had codes like this come up only in boost. I figured the ckp one just the iacv I don't understand.

 

Hmm. Could be in the software, could be where you're losing voltage somewhere and the computer isn't sure what it is. I've never had codes form running 2.5bar before. I guess this is where you may need to go to the Engine management forum.

 

If the codes go away when you reset the ECU (or the car), I'm enclined to agree with the voltage idea. Do you have a voltmeter in your car, or can chrome log voltage for you? What ignition setup do you have? Check and clean all of your grounds, as well - bad grounds can cause funny voltage problems.

 

I can't post picture from my phone but it was the sensor pick up on the dizzy shafts for the ckp sheared every other tooth of am actually impressed. Switch it out and all is fine. I have had the iacv code come on before I just turn the sensor off. I also apologize about my last post I worded it back words.