Ok, so the other day I was bored while driving and I started paying attention to my A/F ratio and noticed it jumps to 20.00 when i just let the car coast. So being the paranoid me i took out my phone and checked Torque for any fault codes. Im getting a gray P2263 code (intake charge system malfunction), but my car seems to be running just fine, builds boost normally and everything. Does anyone have any ideas about why its throwing that code, and where I should start my investigation? Oh and if anyone knows why my A/F ratio jumps to 20 while coasting? Thanks!!!!!

 

this is normal, on decel the car turns off the injectors because you don't need any fuel, as for the code try clearing it with evoscan or whatever you have available and see if it comes back. Also would help if we knew what mods you have, could be a problem with the maf, boost controller, map sensor maybe? boost leak?

reset code, boost leak test (always a good idea) check maf wiring, boost controller wiring, map wiring, especially if you have recently messed with any of these. Also did you have a check engine light before this? or did the code just show up when you read it?

 

The only mod I have is synapse BOV, just messed with all piping from airbox to turbo and cleaned maf with electronics cleaner, so ill check for proper fitment, no check engine light,code shows up only when read, I thought it might be boost leak but I recently did a boost leak test and fixed all boost leaks

 

did you try resetting the ecu?

 

No I have'nt, but good idea, ill do that, oh I forgot I also have a walboro 400 lph fuel pump

 

did the code ever come back again? or did you find the issue?

 

On decel/coasting I got --- on AEM wideband.never saw 20.