LegendaryHarry

so i was wondering.

my car is pretty stock. just intake and catback. but im running rich.

my AF ratio is 11.7ish the drops too 10.9 right before vtec then hits 13 for 400 rpm then tapers back down to 12.7 by 8k.
also there are lots of blips and hiccups on the way.

did i just get an unlucky car from the factory. or should i take it in to a mechanic for diagnostic.

cause if its just unlucky car. im gonna just try n get emange ultimate or vafc.

just hope it aint anything else.

thanks.

bigwhite

Get your primary o2 sensor checked. Change if necessary.

most probably O2 is the reason.

In the meantime check your map sensor also.

LegendaryHarry

okay so ill have the primary o2 sensor checked by a shop.

and the map sensor how do i check that?

nightcrawler7188

it's the little plastic thing on top of the throttle body. once you see it it's straightforward to remove. check it for gunk and clean it up. also it *might* help to reset your ECU. disconnect the neg battery cable for like 15 minutes then reconnect it and let the car idle for lke 5 minutes.

LegendaryHarry

k well i reset the ecu by pulling the fuse for 100 seconds.

and i couldnt get the screws that hold the map sensor off. and it started to strip so i didnt go any further. i just whacked it a couple times.

lets see if i notice a butt dyno or maybe gas mileage increase.

ps

is there a way for me to check the o2 sensor myself?

sharkbite

yeah whacking it might help or u could just find someone with a impact screwdriver and whack that to take them screws out, just dont whack it to hard and make sure ur twisting the right way.

LegendaryHarry

^^ yeah turned it counter clock wise and those screws are tight!. started to strip so i stopped.

anyway to check o2 myself?

bigwhite

Well, you need to temporarily replace the o2 sensor with another sensor (known to work well), and see whether the problem persist.

This is the only way that you can check the situation of the o2 by yourself.

Normally, a diagnostic device can test the sensor and see the situation.

LegendaryHarry

ic... so shop probably best bet. haha

well i plan on getting it tuned with either emange or vafc. so ill just bring up the issue before it gets tuned.