sup , i just got the b20vtec tuned with hondata s300 .. overall i am very happy with the tune, WOT feels great , and most of the partial throttle feels great. Since i can fix minor problems myself with a laptop, i wanna take a crack at it

- partial throttle's AFR is at around 14:0 when i m lightly accelerating but if i let go of the throttle slightly more to maintain speed, it richens up , what part of the tables should i take away fuel at ?

- partial throttle under 2500rpm is very jerky , is there anyway to fix this ?

- in the morning when i first turn the car on , i have to hold the gas peddle for about 10 seconds before it idles at 1300 rpms .. again , is this fixable ?

thanks !

 

If you paid some one to tune your car, have them fix the issues for you. There is no point in trying to fix things you paid some one else to do.

If you insist on playing with the tune your self look into:
Paremeters/Fuel Trim:
Cranking Fuel Trim
Throttle Tip In

Concerning partial fuel tables etc, review the information on hondata.com (help files & videos). There is more then enough information to educate you on what you are asking :-)

 

thanks for pointing me to hondata.com .. i actually read everything there already. I understood some, and was also confused at the more complicated things. i spent money on the s300 because ive always been interested in tuning (although i dont have the time, and money to go take a ef101 class but for sure in the future) ... this right now gives me a chance to learn and experiment so any help would be great

- i hooked a laptop and wideband onto the car and fixed the rich issue. I took away fuel from columns 2-3 from 2000 rpm-4000 rpm. i read about the fuel trim but the explanation of it was too brief. Im pretty sure i ll need to take the class or read a book to fully understand it ..

is there any tips u can give me to try and fix the remaining issues ?

- cold start .. it starts without me pressing the gas peddle but dies immediately ( i give it gas and hold it for 10secs ) and its fine after that

- hot start .. if its really hot , and say i turn off the car to put in gas , i have to step on the gas peddle to start it back up .. ( do not have to hold it ) the AFR then seems out of wack ranging from rich to lean , and after about 30 secs , its back to normal

- partial throttle under 2500 rpm is very jerky ( makes taking a turn at 10-20mph ) uncomfortable .... ( ive also read that advancing ignition will help )

if anybody can help that be greatly appreciated .. i can even upload the file !

P.S. i really do plan on taking the EFI class in the future .. just too busy with work/school to be able to do it

 

There are basemaps that run better than what you are describing. If you want to learn tuning i think everyone should at least give it a go then you can appriciate what it takes for those few that can do it. Really all you have described is spelled out in many of the books on EFI, Boost, Honda Engines, Advanced Tuning, Tuning with Jeff H. Start reading Hondata should be easy to work out those issues. it doesnt really matter what your tuning with you have to understand what the engine needs for what you described then you will be able to adjust.GL

 

Maybe you should be asking the dealer you bought your s300 system from for tips/guidance :-)

 

fcluddington - no I greatly appreciate the great tuners I see here . which is why I will study and try to become a decent one myself ... I've tried different "popular" tuners around my area and although they were decent, it seems I can never get good street drivablility from it ( maybe I'm jus picky ) .... anyways like I said , I will definately read books/ take classes when I get a chance ( hopefully in the summer because I'm a full time worker and student )

mtber - yea I guess I will email the s300 dealer I bought it from ... to be honest , I understand I'm new to all this so I might come off as an idiot because I don't kno how to solve these issues . I jus thought since I'm not asking for free info about how to make power , etc , that I can come to a public forum where many s300 dealers are at and get schooled on some easy fixes .... no offense , but u made it seem to me that u couldn't give me tips because I didn't buy it from u .... guess I misunderstood what the tuning section of a public forum is ... sorry for the rant

end thread

 

Nobody called you an idiot.
I gave you free tips above to get you going & instructed you that you should be contacting the dealer/tuner you bought your system from for direct answers to your questions as they should be able to provide support with the Hondata product as that is part of being a Hondata dealer.

 

again , no offense . if one of your tips were to instruct me to contact the dealer I got the s300 from ( when u r also a dealer ) , then yea , I must be pretty stupid .... again , this is a public forum where people who have problems will post and people who can and is willing to help will help. there are thousands of threads where people will ask things like " why is my car not starting " ... u gonna tell them to contact a mechanic ? ....or "what's the first thing I should mod" people usually will help by saying maybe u should try some bolts on lol ...etc . I didn't ask for any figures or number , all I asked was where is a good area to adjust to fix these types of problems :..... anyways , like I said not that big of a deal .... this thread needs to end because it's taking up space

 

I guess you didn't the quoted post above as being helpful.

The instructions to contact the dealer you bought the system & had the car tuned by was simply to help you out as a consumer.
You paid for a product/service & you should get technical support with it which should be more direct then asking for help on a forum.
Anyhow, I hope all of the information & advice I provided you with helps you out in some way!

 

I see that u meant well in your response ... I bought the s300 from a dealer , not sure if they tune or not. and my tuner is about 1.5 hr drive , he is also really busy so it takes time for response unless u look for him at the shop which is why I turned to HT for a quick response because I notice alot of knowledgable people roam here such as yourself.

the response you gave me in the first post was useful, I decided to google it and what I found were short descriptions of what it was but the majority was people saying how they adjusted it and what values were input into their own setups. what I was looking for was a more detailed info about what it is and how it can solve my problems so I can adjust it myself more carefully instead of blindly

 

Its always helpful to post your setup, map and a data log of the problem.

 

x2. Post up a log of the problem areas.

Some things to look at;
-what are the afr's when it jerks?
-what are afrs when you start the car? You'll need to hook up your wideband to direct power and have it warmed up before you start the car to monitor this.

My suggestion, if you want to learn to tune start messing around with your tune. Be sure to save the original file since i'm sure you'll need it in case you fubar your tune. As long as you don't go too lean, you won't have any issues learning to tune on your motor.
Richen up or lean-out problem areas until they go away. Hands on is the best way to learn. Messing with the timing in the vac areas isn't going to hurt any as long as you don't get too extreme.

 

The lower portions of the map, generally below 2000rpm and light load will be affected by your fuel cut settings.

Make sure your TPS is calibrated correctly in the tune, this will definitely cause light throttle hesitations.

Does your car having a functioning idle air control valve?

I would definitely suggest posting your map if you want help, that makes it a ton easier to do.

 

thanks for the response guys .. i m not sure how to upload the file but i took a pic of the low speed fuel and low speed ignition tables

throttle tip in is at 0 .. not sure what other info u need .. i cant datalog it because i dont currently have access to the laptop ( shared ) .. thanks ! any more suggestions , tips is greatly appreciated

 

thanks for the response guys .. i m not sure how to upload the file but i took a pic of the low speed fuel and low speed ignition tables

throttle tip in is at 0 .. not sure what other info u need .. i cant datalog it because i dont currently have access to the laptop ( shared ) .. thanks ! any more suggestions , tips is greatly appreciated ... again

the setup is b20vtec .. 11.5 compression .. pro2 cams .. 91 oct .. 440cc injectors

 

I would suggest changing your RPM scalar for the low cam to better suite where you car is going to idle.

This way you won't have that huge jump from 20* timing to 37* of timing... this is more than likely where you are experiencing your part throttle hesitation.

 

thanks for the quick response ! ... so I can pretty much advance the timing higher to solve it ? ... is there a safe point of when I shouldn't go any higher .... if u were to judge the overall timing and fuel, does it look about right ? .... thanks !

 

You should almost never have that drastic of a timing variance, the 20* should gradually scale in both directions outside of your idle range. It likely explains why you need less vacuum on start and why you're having part-throttle hesitation.
The decel enrichment might have something to do with fuel cut, but other than the full throttle tune it looks like they just half-assed everything. Take it back.