car starts fine runs about 14-15 afr till warm then drops to like 19 20 with misfire, fuel pressure is 35 idle, 45 with line off, i'm fully tuned on c16, any sugg? map, tps? fuel pump shitting? injectors? i just changed the filter so its deff not that, i got a couple big events comming up and need to get this figured out!

 

What is your setup? Nobody can really help if they dont know your engine setup or what your tuning the car with.

 

its always good to tell what your setup
like what he said
we cant help you without knowing what you are running
its not like we have eyes to see your engine bay

 

sorry sorry i know lol i was in a hurry, setup is sohc d15b turbo full tune by morgan at synapse motorsports. vitara eagles, precision 880 injectors, walbro 255, stock head, s300, plus more but thats basic setup with t3/t4 57 63, so i am noticing now that the fuel pressure will rise when the throttle is tapped while its cold, when it starts warming up and the throttle is pressed the fuel pressure will start to drop, also when i disconnect the tps, nothing seems to be affected, omni tps, haven't had a chance to check the tps through hondata though. Just orderd a new fuel pump today, i know i am just shooting in the dark there though. car is a strict track car hardly any fuel in the tank ever, did pull the pump it is coated white from heating up so much i assume. To top it all off my c16 went bad so i have been waiting for more fuel.

 

so little update, i have emptied tank, put fresh c16 in, new walbro 255 and sock, new fuel filter, swapped ignition coils, plug wires, still nothing, seems to be happening at any rpm which you hold the throttle at, only when the throttle is being held steady, quick revs are fine with no miss. Is this an injector problem? i have precision 880's P&H with resistor box wired in, resistor box turns on and stays on so i assume nothing there. Fuel pressure with vac line on is around 37 and vac line off around 45. I am stumped here and have a big event comming up in 2 weeks, any help would be greatly appreciated

 

I don't think you would have looked passed it but is there any chance you have a hole/leak in your fuel line?

 

Sounds like you may need to have to tune re-checked.

 

air temp and coolant temp corrections are not setup properly. depending where you live with climate changes you will have to adjust temp compensations to get it where she needs to be reguardless of the setup

 

really, i just don't understand why now its gotten worse and the temps now here are much more like the ones when i was tuned, nothing else has been changed, so i don't know why i would need to have to tune file checked? Turbo-ls something you would be willing to take a look at if i sent the the bin?

 

bump

 

^^THIS is were I was getting at. Your air temp compensations are off. I had a summer, fall, and winter tune until I learned about the compensations. Now all is good.

 

Check ur o2 sensor

 

Is the car runnng in closed loop? When I tune I leave the car in open loop. I've always had issues wih closed loop screwing up my tunes. If the car is running closed loop the o2 could be bad otherwise def a coolant and or air temp compensation problem

 

Bad Wideband could cause this as well???

 

The wideband is prolly right if you say its running bad. Its real lean is the problem.

 

Ya I'm getting frustrated, I thought when these Bosch sensors go bad they read rite around stoich this is still giving readings. Someone willing to check out my bin file?

 

Are you checking fuel pressure after warmup? If that's not changing as the car warms up the obvious things to look at would be all the enrichment maps (water temp, IAT etc) and associated sensors.

 

yeah, i am just not to familiar with hondata to check any of those things, i really wish i knew what the hell i was doing in hondata, lol i have now performed comp test, perfect, noid light test are all the same so that good, plenty of spark on all 4, injectors all sound good and all sound the same. resistance is all the same as well

 

bosch sensors read lean when bad.

race gas, specially c16 will kill them quick.