So I'm currently having an issue with my new build..
When i start car it has a weird 2-step idle then goes to normal rpm. When driving with foot slightly on pedal it seems to bog /cut fuel (i think) also when I reverse it does that 2-step idle thing again.. idk does my iac have anything to do with this or ecu??? I'm using a p28 I had chipped for 1.8, now I'm running 2.0 with Stock fuel pump, injectors, fuel rail etc. Help please!!

 

get a correct chip for your b20v. also where did you get this chip from ? any CEL\codes ?

 

Your map should be suitable for a stock b20v. Since everyone starts a basemap for a b20 with either a ls map or gsr map.

What you really need is get a wideband gauge to monitor your air/fuel and get it tuned.

A basemap is just for you to start it up and get it to a tuner.

 

I got this chipped ecu like a year ago online.. I haven't checked for any codes, I know my check engine is on for a fact because of some sensors.. people tell me check engine lights shouldn't even appear after you get a chip.. well mine does! Has anyone had similar fuel problems like this??

 

Wow....that means the people who tell you that....are complete idiots. So a chip voids any issue a sensor can be giving? wow

Fix the sensors...when you have no cel and the car is still acting weird, then come back with a real problem and state what you've done to try and correct the issue. So far you haven't done anything by the sounds of it.

 

I know its crazy man

 

The only sensors that need repairing from my harness are the speedo & coolant temp.. they should have nothing to do with this last issue I encountered

 

You clearly said you havent checked for any codes....so you really dont know whats going on. Check the codes, takes 1 min to do.

 

I wasn't able to check for codes but I was able to mess around with the sensors behind the intake manifold. I switched two sensors around, the purge cut solenoid & iac.. they're identical! That seemed to do the trick