idle problems with B16

Kai-DelSol · Post by **Kai-DelSol** » Sat Jun 07, 2008 12:30 pm

Hi

After the first start the car runs at 2000 rpm cold idle and then it idle up and down from 1000-2500 rpm and the engine lit is on.

Setup:

Stock B16a2/Blockguard/ARP Headstudds
RC 440 Injectors
T25/28 Nissan Turbo/Tial Wastegate 6Psi
S300 installed/Basemap Created like the discription

Whats wrong now ?

Post by **Spunkster** » Mon Jun 09, 2008 9:53 am

http://www.hondata.net/forum/viewtopic.php?t=3772

Kai-DelSol · Post by **Kai-DelSol** » Thu Jun 19, 2008 3:58 pm

Here i am again.

After installing a SM-AFR from PLX Devices and a little bit tune to run the car not too lean, the idle issue was gone. It idles around 1500 rpm, a little bit high but stable.

A short test drive in 1st and second gear and some changes on the fueltables to get it a little bit Richer, it pulls good, sounds good and is driveable.

A short pull in 1st and 2nd gear and the idle problem is on. idles from 800-1500...

I use the SM-AFR only for Wideband monitoring on D10 ELD. The stock Narrowband is already connected.

On the D connector of my ECU there wasn?t a wire in the D10 ELD.

I add my map and a datalog to show what i mean.

Please take a look at this and give me a anwser.

I think that the AICV has an error.

Post by **Spunkster** » Thu Jun 19, 2008 4:56 pm

This sounds like a problem with a vacuum leak. Usually this is at the throttle body.

Kai-DelSol · Post by **Kai-DelSol** » Fri Jun 20, 2008 4:16 am

i will check all Vacuum lines today.

But why cant i get the idle to the 850 rpm ? it has no matter in open or closed loop. idle is 1500...

Kai-DelSol · Post by **Kai-DelSol** » Fri Jun 20, 2008 11:24 am

Hi, Today i fixed the idle problem.

The intake mainfold gasket wasnt right.

I have some problems with the Map from the s300. The calibration File wont open.

My Laptop is Vista and my Home PC (i write here) has XP Pro.

I cant post the new Tuned map today, it semms that the Map i have postet has the same problem.

Ok... Back to topic...

I have start tu tune the car by driving and it seems all good But:

It will not rev over 7k rpm. It sonds like a revlimiter that the injectros wont add fuel over 7k RPM.

I have a Walbro 255 installed but the stock Fuelrail and the Stock Fuelpresure regulater.

Is this a Programming issue ? over 7k rpm the Injector duty cycle is over 100 %, How can i fix this ?

Post by **Spunkster** » Fri Jun 20, 2008 12:13 pm

The calibration you have posted is corrupt. Go to File, New and create a new one and upload it to the ecu.

Kai-DelSol · Post by **Kai-DelSol** » Fri Jun 20, 2008 3:00 pm

How can this hapend ? is that a Bug that the file are corrupt ? in the past i had this problem one time and since then never more.

That can be the answer why the car wont rev over 7k... i will check this tomorrow. i hope that these corrupted file is not in the ecu.

Is that ok when the injector duty cycle is over 100% on High Load ?

Please give me a Yes or No to my Basemap creation procedure.

1. Stock P30JDm > Create Boost Tables (Retard Ignition .75 Degrees per Lb Boost / Add Fuel under Boost 120% naturally aspirated Fuel levels)

2. under "Fuel Trim" add the new Injecor size 440cc

3. When its too lean, Add fuel in "Fuel Trim" under "Overall Fuel trim" in %

4. Fine Tune in the Fuel Tables but not going over 100% Injector Duty Cycle ?

5. When its Lean after changing "Overall Fuel Trim" to max (i think 100%) get more Fuel Presure ? and Tune again

Sorry for this Questions but my English is not so good and thats the way i understand it ;). Here in Germany the people wont help me so they will only my Money but i will Learn to tune my Car by my self

Post by **Spunkster** » Fri Jun 20, 2008 4:15 pm

You should never have to change your overall fuel trim to 100% If you are making huge changes to the overall trim there is a problem soemwhere. Your pump my not be working correctly or you may have a restriction soemwhere.

Kai-DelSol · Post by **Kai-DelSol** » Fri Jun 20, 2008 4:36 pm

ok, that was only an example for me ;)

I have seen some issues on my laptop with Vista.

When i create a Basemap on my Home PC (windows XP) is all fine.

When i change the Injecor size the Injector Duty cycle in the Map also changes.

On my Laptop, when i change the injector size (Windows Vista) it wont change the Duty cycle, it stays a whole over 100%.

Now i have created my Basemap on my Home PC and load it to my Laptop. the Calibration is the same.

Is that a Bug or is the SManage not so good with Vista ?

Kai-DelSol · Post by **Kai-DelSol** » Sat Jun 21, 2008 9:42 am

After creating a new basemap and idle/part throttl tuning the car will not rev over 7k rpm when i try to hit my target AFR. it only runs to max rpm when its around 14-14.4:1 afr on high load.

When i will add fuel to get my target AFR around 12.8:1 on high load, the injector duty cycle comes over 100% and it will not more rev to the max. it sounds like a revlimiter.

here is my currend calibration with one datalog (only in the first gear, i have no chance the next days to drive it on the road for a 4th Gear datalog).

Here is my current setup:

T3/T4 Turbo .50/.63AR , Tial 38mm Wastegate max 8 psi
RC 440 12ohm injectors
Walbro 255 Fuelpump
Stock B16a2 with Blockguard and ARP headstudds
Stock Fuel pressure regulator (i dont know how much fuel pressure i have with the stock one)

Post by **Spunkster** » Mon Jun 23, 2008 1:12 pm

I see it going to 7845rpm. You need to check your fuel pressure. Make sure the regulator is boost referenced as well.

Kai-DelSol · Post by **Kai-DelSol** » Mon Jun 23, 2008 2:19 pm

The regulator is this little thing on the Fuel rail ?

that is the Stock one. Is it good to buy a aftermarket fuel pressure regulator ?

Well i think that also like you that my Fuelpressure is too low for this Turbo.

I have read that the B16a2 has 35 Psi and a B18 and Second Generation B16a2(OBD2) has 45 Psi Fuelpressure.

I hope the Injectors are Big enough, i wont buy Bigger injectors, these are expensive.

For the First setup, it was a T25/t28 Nissan Turbo planned but this one has cracket and so i only got This T3/T04E Turbo... I think that this Turbo produce much more Airvolume against the Little T25/t28.

Wish me Luck that i can fix this with more Fuelpressure.

I write back when i have test it on Wendsday.

Kai-DelSol · Post by **Kai-DelSol** » Mon Mar 30, 2009 3:04 pm

after a few monts and a lot of mony (i have build my complete engine new.. i have blown the piston rings from the stock pistons).

Here my complete New setup:

T3/T4 turbo .50/.63 AR
440ccm RC injectors
255lhp walbro fuelpump
Fuelpressure regulator set to 45psi overall
Brand new Wiseco Turbo pistons
Brand new Eagle H-Beam Rods
Brand new Valves
Brand new Bearings and all Seals

Car is Running smooth but there is a little problem.

In Oplen loop i hit the 14.7 afr in idle and part throttle driving.
In Closed Loop i can´t get it to run to 14.7 afr. it runs everytime around 14.6-15.4 afr.
Idle is fine at 850rpm but in Closed loop at 15-15.4 afr...

Where can be the problem ? the ignition ? a little leak in the exhaust that the wideband reads not correct ? the O² voltage is in Idle and part throttle driving around 0.4-0.6 Volt.

Is my SM-AFR damaged ?

Post by **Spunkster** » Mon Mar 30, 2009 3:13 pm

in closed loop it will vary a little, and what you have posted looks fine. IT will just help you get better economy.