Just because someone has the same fuel setup doesn't mean the fuel map and spark map will be the same, differences in intake\exhaust\etc can change how much air is getting into the engine.

Just go around data logging, just while crusing and upload the log and your tune.

alright drove around, some cruising (got stuck behind a prius) and some altering throttle position at given rpm, i can get it to go up to around 5k if im easy on the throttle, if i accelerate a bit more aggresively is when it starts backfiring and popping. i dont hear anything from the engine side, like knocking noises or anything, its just alot of backfiring, sputtering, and popping.

logs below
the first one my cable fell out

Post your MSQ as well.

upload tune as well.

Do you have your wideband connected?

wideband is connected. it looks to be slightly off from what the gauge is reading at idle, but pretty similar when i was out driving around.

but you're not logging AFRs, only volts it appears. I cant access MLV or TS here at work. I'll look later.

also press the spaebar anytime you want us to look at a specific time during your log. that will mark the event.

Go to file > project properties > Settings tab > ego o2 sensor, make sure its selected with the correct wideband sensor.
If what I see is correct, its on narrowband. Make sure its on correct sensor.

Is it possible that the MAP scaling is fucked up?

You should purchase the registered version of tunerstudio and use ve------yze. The base map on diy has a afr target table which would run right on 7psi

Just looking at idle with PW only looks like your way rich, though it reads around 60map value, possible the map sensor settings aren't correct.

This is a MS1, did you build it?

Forgot to ask, did you verify timing yet?

it was still set on narrowband, i thought i had changed that...
im heading up to napa to get those ngk bkr7e plugs, ill log while im headed there
so is it too much data if i just log my whole drive? (10-15 mins)

i was trying to avoid spending another 40$ on software but i guess it would prob be worth it after all the money i have already invested..

why waste money on plugs right now, have you verified timing?

it is a brain built MS1, i verified timing when i first installed it. i since unplugged the main harness to plug into my stock ecu, but my MS1 was not messed with when i did that, just unplugged the harness, when i reconnected the MS1, i shouldnt have to reverify timing right? that value would stay the same


about the map sensor, its set to mpx4250 -250 kpa MS v2.2 which is right i believe since i have the v2.2 board

verify timing again to make sure. do not waste money on plugs yet, once you verified timing and make sure its ok, just let it idle and datalog for a minute or two idling literally. After that stop car, open datalog and verify wideband input is correct. Post up idle datalog after then. Buying plugs just to replace them without getting the tune fixed will just ruin more plugs.

reguards to the sensor, v2.2 sensor means nothing. If you didn't build it you need to verify with who did and who you bought it from to make sure which sensor it is. you can have various map sensors in there that look the same as the 2.5bar one. 2.5bar is just a common one the kits come with.

15-20 minutes worth of datalogs will not be to much data at all. I have logs of me driving for over an hour.

Stop being a cheap JEW and spend the $40 on TS. It is worth every penny. Also Phil the guy who made TS is a great guy and the money is going straight to him, not some big corporation.

log of idling below

also, after i stopped logging, i altered the fuel table around 55-75 kpa and 800-120 rpm
its at 45-40 and i lowered it incrementally all the way to 30 and my AFR seemed to still stay around 10.5-11

went ahead and paid for TS registration and MegalogViewer just waiting on the email now. I wasnt aware it was money going to someone on the forum here. makes it that much more worth it.

ill have to do some reading on the VE analyze stuff but i guess just use the AFR table then let it do the rest?

which table did you alter, the AFR table or the FUEL VE table? Just have to make sure.
Made sure there is no vacuum leaks after the throttle body?

i was looking at fuel VE table

how do i get to the AFR table in VE analyze?