Civic D15B(Exi) Idle issue

[hammi]

[Hassan1991]

Either they were really black before or mixture is still slightly on rich side.

[Hassan1991]

You have to search honda pinouts. Search according to ODB ecu you have. Means all obd1 have same pinouts and all obd2 have same.

[hammi]

They were dense black before. When I bought it I was getting 3-4kmpl. Now its around 10kmpl without torque convertor locking. Target is 12kmpl inter city on light foot lets see!
It has a 3 pin connector are they OBD1?

[Hassan1991]

Insha ALLAH
Honda life

[hammi]

I’m a big Mitsubishi Fan but for now yes Honda or more like 1980’s life

[Hassan1991]

all of them are good, but honda has huge fan following in jdm. therefore tons of info are available on internet, making it easy to try something new.

[hammi]

I cannot disagree with that.

[shabbir.1]

For most of the D series engines, base timing or the mechanical timing has to be adjusted ideally at 16° BTDC (idling at 750 rpm). To adjust the timing the ECU has to be forced into diagnostic mode. Once the engine starts running the ECU constantly adjust the timing on the fly as per the load conditions.
@Hassan1991 for expert input

[shabbir.1]

Got it! I will get it checked that way too. If the scanner is showing the engine is at 85 degrees and the fan turns on isn’t it the same thing? It means the engine thermo fan switch starts working at 85 degrees.

Fan kicks in when triggered by the thermo/fan switch (normally at 95°C), while the ECU gets continuous temperature signal from ECT sensor (a two wire thermistor). If these (ECT reading and Fan turn ON temp) are not in sync with each other then it indicates that either ECT or the thermo/fan switch has gone bad.

[Hassan1991]

no expert Sir just an enthusiast.
@hammi Crank ignition timing and distributor advance curve are different but mechanical then an there's electronic timing controlled by ecu.
For example
You set timing at 16 degree on crank. Then on distributor curve you rotate it to 10 degree. Total timing would be (10*2+16) = 36.
Then what we see on scanner is timing advanced by ecu. In D series at idle it should be 12 give or take 2.
Actually ecu further retards or advance the timing keeps different factors under consideration. For example rpm, throttle input and Afr ect.

[hammi]

Update: I put the genuine Fan switch in the car the fan starts working at 95-96 degrees and goes off at 88-89 degrees. The temp needle has some issue I think. On the scanner the coolant temp was 95 degrees when the fan turned on the needle was past half mark. I will get the needle fixed.

The main problem is the automatic solenoids are not working. I have attached the D4 switch. When I put the car in D on the scanner D4 switch goes on. The solenoids are connected with ECU too. There another switch on the scanner named PNP. The Value on it always stays in GEAR.
I think someone has bypassed it so that the engine revs past 4000RPM. I rev it in neutral the RPM goes all the way to 6700 whereas auto car should cut the RPM at 4000 in neutral.
When I connected the D4 the Solenoid B had value 0% and solenoid A lockup was OFF. Is the gear looking for VSS signal for solenoids to work? Or should the solenoid B show some percentage when moved from N to D/stationary car.

[hammi]

@Xulfiqar Sir need your help please^

[hammi]

i was playing around with the distributor just to check if the timing changes on the Scanner. Youre right the Ecu keeps on adjusting the value to 12 degrees no matter what. Doing the experiment I lost the original position of the distributor. I will borrow the timing gun again and set the timing
There is no special function in the ECU to take a nap and let me adjust the timing manually. I think the only best possible way is timing gun. Though there is a special function for idle adjustment/biss screw but for that the car has to be In P and my PNP switch has been hard wired to stay in gear Lol

[hammi]

Another thing I noticed today. I just thought of checking the PCV. The PCV had oil in it and it was clogged. I cleaned it with the spray but I couldn't hear the ball moving freely. I think i should change it. Is the PCV same for all cars? It looks same as on my Lancer I have an extra PCV for the Lancer can I use it on the Honda? New PCV wont be available Im sure because “ustaad je is mein charra chan chan karta hai aur koi faida nai iska”. Qabli will already be nearly dead.

[Hassan1991]

That timing is mapped inside the ecu. Interpolated in tables. Fixed. In aftermarket ecus you can program them.
Try to find service manual of your transmission.

[Hassan1991]

Yes change it. New are available.

[hammi]

I dont think its a tranmission issue. Seems like a wiring issue to me.

[hammi]

Where can I get one from in Isb/Rwp?

[Hassan1991]

Yes details will be in service manual including wiring diagrams.
Sorry i'm from lahore.