My car running Over Rich .
the spark plug reading have a Ring of slightly Oil moist Dark soot.

what are the Option i can do
without ECU tuning .
without O2 sensor .

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Idea
Reducing Fuel Injector from 240cc to 200cc ?

Reducing Fuel pressures
IF stock is 46 Psi or 48 Psi
Will reducing it to 42psi - 44psi

work ?

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i am not talking about drastic adjustment but multi fine tuning which is within reaches of simple tech or part change .

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what would you do .

a Manifold leak had improved MPG . but it cause Idle problem .

maybe a Vaccum Loop to extent the Vaccum flow ?

all crazy idea but i would like to learn more.

please do not Slam the post if you want Stock and standard i am talking about . Option .

Thanks

 

Something else is causing your engine to run rich. It's probably because you have the incorrect ecu.

You don't bother to adjust ignition timing to proper spec.

You don't say if you have any CEL (check engine light) codes

You don't listen to what we tell you to do.

You have to have a starting point. That starting point is to make sure everything is withing stock factory spec, to make sure that there is nothing wrong within the factory parameters.

Get to that starting point before you start messing with things that don't need messed with.

 

the CEL light is not There , Checked the Bulb and is working fine ,
NO Check engine light . NO o2 Sensor .

The Timing had been adjusted . 810
i am looking for technical info .

i trying to understand the relationship and the gap for adjustment .
what the factory did is tune it to what there feel is best .

i am looking at Fine tuning i know standard mech would not touch it . as it need lots of wisdom and understanding of the car to even tune the part.

i am learning i want to know more .

 

So now you don't have an O2 sensor, and you are wondering why you are running rich? an O2 sensor greatly effects your gas mileage and how rich/lean you run.

And if you don't have a CEL for no O2 sensor, then you have a problem.

Also timing is not adjusted by RPM...

We've already stated timing should be at 12*, and this is adjusted by using a timing light and following the factory procedure.

 

I went to the workshop . there used the timing light and turn to me said . is Good .
and i saw the gun show 810 that what i know .

The post is asking what are the Option if you are without the right ECU and O@ sensor
is not about setting it back .

i am trying to figure out the relationship between the fuel injector as well fuel pressure . and so on .

i have order a O2 sensor will take a while .

but i want to understand .

if i adjust the fuel injector . from 240cc to 220cc or 200 cc

what will happen

if i reduce the PSI on the FP what will happen ?

this is all learning curve question .

 

You don't need to do all that though. You need to put the right parts in.

Factory d16y8 injectors are 240cc injectors. Putting in smaller injectors would cause it to run leaner, and with the correct ecu, that would be bad.

Reducing the PSI on the FPR is not necessary either. It will cause less fuel to be sprayed into each cylinder.

 

That what i was thinking .

I know currently my Spark plug burn well with only the Rich dark ring .

Assuming all is well with only the O2 sensor missing and also the ECU which will cost me $600 to fix all .

if i can just change a 200cc or 220cc for $40 and a temp solution whike i find the part
Would be a good option to buy me a few month

is not easy to find a P08 ECU
is even harder to find a Tuner or someone who can tune Honda ecu or Map it .

I found the O2 sensor ? ( wire for OBD2 )

that why i am looking for alternative option .

the money part i can find , The Tuner part i am in the dark .
good example is the last workshop which connect the light gun and told me my car is doing fine and sent me off after taking $20

So reducing the fuel Injector Flow will give me Leaner burn .isn't that what i am looking for ? what are the Down end ?

would a conbine of Fuel perssure and reduce Fuel injector flow . compensate for the Over Rich burn now .

i am guessing i am burning like 12:1 would be good to run 15:1 or 16:1

Spark plug i am using Needle point NGK gold

 

O2 sensor is cheaper to source/install.

I'd start there before changing injectors.

 

i found a O2 sensor . and should come in a week .
i am not very confident that the O2 would do much .

since my Cam gear is not adjusted advance 4.75 . or is it retard 4.75 .

i am trying to learn more and find more option .

Fuel injector is easy to find here. ( japanese junkyard part . )

 

Do you understand what the o2 sensor does?

Japanese junkyard should have a correct ecu as well.

( @RonJ Do you know which ecu's this guy can use? D15B vtec 5 speed )

 

I did try to look for P08 but mostly found auto one .

and the MT P08 is usually stock up by some workshop so rarely see any on the market ,

THE O2 sensor check the Oxygen in the exhust to determine and adjust the fuel Flow .
That what i understand .
So i am consider other alternative to control the fuel flow or reduce it .

since i know i am burning RICH now .

is either i Reduce fuel flow or Increase lots of air . But if the Ecu is giving 14.7:1 rato command ,. having more air would in directly mean more fuel used .

finger cross if O2 work

 

The o2 regulates the air fuel ratio based on how much unburned fuel is in your exhaust gasses.

Therefore, if you have a correctly running O2 sensor, your car will not run as rich, since it is regulating how rich the mixture is.

The ecu needs the O2 sensor reading to adjust the air fuel mixture.

I still don't understand how you are NOT getting any CEL codes if you don't have a plugged in o2 sensor. that's not possible.

 

No idea the light is fixed but no cel show up
The engine is a carburetor engine in the past . and swap with a D16y8 top .
Does this info help ?

I will try to find O2

 

Fix what you KNOW is wrong. It NEEDS an o2 sensor unless you are going to chip and tune your ecu. Your single biggest problem right now is the lack of o2 sensor. Fix that before anything else.

 

I just order the O2 Sensor
and should reach me tomorrow and will install it .

assuming is still the Wrong ECU -
P6x-T51 ( Auto ) ( mine is a Manual )

will i be expecting any improvment ?

The MPG is going crazy i ever clock 16 MPG
it jump a little vary but mostly City - and 25% Highway .

 

Lol. no o2, Running rich, wonders why? sum1 tells him. still wants to adjust fp.


He is trying to save your cars health. please leave Inj.s and fp alone an replace your dogawn O2. Your Improvements depending on if you get a correct ECU your fuel mileage is going to like triple once you get an O2 sensor back in it.

 

At this Stage i know is a Wrong ECU - Since my Car is a Manual and the ECU is for Auto .

The point is about understanding the Different part . i am asking question so i understand my car more .

I know about the O2 and had order it .
i am also looking for ways to Tune it .
and is importance to know what each part role is and also how each part can affect the other as well as how we can compensate if we adjust the other .

Honda did it . i do not see why we can;t do it also .

To make it Extra Lean . or More Robust in According to how we drive .