It seems that when I reset my computer my car seems a little faster till after a few days. It runs richer and seems to start to get sluggish at low rpms but still pulls hard. It will shoot flames at high rpm shifts. Is there something that is causing this or is it just normal for the computer to get richer as it learns the car?

My mods are
base dyno flash, turboxs 3" tbe with cat del, hallman evo rx mbc at 20 psi, koyo radiator

 

I think you need to get your car tuned

or if you did get it tuned go to a different tuner

 

I have just the mail in flash, but it seemed this way before I had the flash.

 

would spacers on the cat o2 sensor cause anything? Could this cause the car to run rich because it cant read enough? I have 2 of the 18mm antifoul spark plug adapters spacing out my o2.

 

bump, anyone else have any opinions/suggestions?

 

No, the o2 sensor only has an effect on the cars idle.

And the antifoulers do not have an effect on the readings at idle either. I have them installed and I still idle at a 14.5-15.2 AFR.

 

guess i just need to get an afr gauge but man their expensive.

 

i thought that the evos ran rich from the factory for some reason but i dont have one so i dont know?

 

They run way rich from the factory. Usually around 8.8:1

 

how do you read the afr readings? what does all the numbers mean and what is a good mixture?

 

with the EVo under boost you want to be around 11.5 to be safe ......N/A cars are different i think they are more like 14 but i could be wrong...


here a a good A/F meter

there is also the LM-1]

and there a a couple more but im done doing your homework

 

you need a wideband 02. there are a number that are available. I have used the innovate lm 1. they now have a cool gauge. but anyway the wideband will give you an indication of how things are burning.
wot on the evo, depends on the tuner, range from 10.5 (creepy rich) to 11.5. off wot the mix can run leaner up to 14 or 15 (say cruising down the road) idle with regular cams 14.7 is what people shoot for.

trouble is, if you have to ask, you need to know you might burn up your engine trying to tune your engine.