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for tuning yes, you need to know you air/fuel ratio to properly tune your car

a wideband o2 will give you reading for you air/fuel ratio, it takes the place of your stock narrowband o2 sensor. the narrowband will not give you accurate readings while tuning, plus most widebands will come with a digital guauge showing the air/fuel ratio for whatever rpm you are at. you want...

ok looking at your setup, turbo tuned and using a fmu? for what purpose? why are you still on the stock injectors. My guess is your peaking out your stock injectors. I dont care if your running less then 5 psi, boosting any car and not upgrading the injectors is just dumb.

there is your problem, p75 is a ls ecu, you need a p72

your going to need a wideband o2, do you have a data log port on your ecu? if so just get the cable. then you can tune realtime. ostrich are old school and not needed if doing realtime tuning. next deside what system you want to tune with crome, or uberdata. I prefer crome. Crome Start-Up Guide

wow, are you serious. PLEASE DONT POST HALF ASS GETTO ADVISE, hes trying to fix his car, not keep the leak. Cam seals tear very easy.

you problem sounds like its in you ecu, find a buddy with the same ecu as you and swap it in, see if it solves your problem.

check you timing, walbro 255? whats you gas milage like?

eld is your underhood fuse box, it may need replaced

this thread started in 04 make your own thread, dont resurrect dead ones

you need to download crome to open the file

checking the IACV start the car,and hold the idle to around 3k until the fan come on, disconnect the IACV and your Idle should drop dramatically checking the IACV plug to check you IACV, turn the key to the on position, unplug the IACV. check the voltage in the plug. the yellow/black wire...

dam you spent 6500 on a auto 98ex

dont get the back seat. that nice flat area wil work better for a bed:)

dam thats messed up, I had a 87 rx-7 gtu with no cats and 2.5" exhaust to a 2" y pipe to mufflers with a 4" tip. That thing was louder then most fox body mustangs. However it also used to shoot out 10ft flames out the exhaust. I never once got pulled over for it being to loud, but I guess its...

just get a 38mm tial and call it a day, O by the way, if your going to be boosting 16psi you want a 8psi spring in your wastegate, Rule of thumb with wastegates is boost 16psi divided by 2 = 8 psi

I dont know what your local laws are, but did the car pass inspection with all the equipment on? most of the time if the front turn signals are amber your fine, (meaning the bulb is amber), the rear can be amber or red bulbs. As far as your mufflers being illegal hes full of shit. Take the car...

take a pic of you engine bay showing the vac lines for your boost controller, wastegate, and blow off valve. Sounds like you have something switched

synapse missing links are great, but there not needed when your ecu is tuned, they are only needed when you are using a fmu or a hack, When you tune you can change the values that the map will see. I understand what your saying about the whole 2 sec then the cel comes on. Your looking at it like...

if your replacing the rear main are you doing the clutch? the tensioner will be fine, the timing belt cover is there to keep that in good condition. I would also replace the fuel filter