Long Trim Short Trim Explained || لانگ ٹرم اور شارٹ ٹرم کیا چیز ہے || How to find Fuel Mileage Issu
Vložit
- čas přidán 29. 08. 2024
- Fuel Trim is the adjustment the engine computer (PCM) makes to the fuel mixture to maintain a balanced air/fuel ratio. Fuel trim is usually displayed as a PERCENTAGE reading on a scan tool.
For lowest emissions, the engine computer tries to keep the fuel mixture balanced around 14.7 to 1 (14.7 parts of air to one part fuel). If the air/fuel ratio is less than 14.7 to one (say 12 to 1), the fuel mixture is RICH. A rich fuel mixture can produce more power (up to a point) but it also increases fuel consumption and emissions. Conversely, if the fuel mixture is greater than 14.7 to one (say 16 to one), it is LEAN. A lean fuel mixture reduces fuel consumption but can also increase emissions if the air/fuel mixture is so lean that it fails to ignite and causes lean misfire.
The engine computer monitors the air/fuel ratio via the oxygen sensor(s) in the exhaust manifold(s). An oxygen sensor is essentially a RICH or LEAN indicator. When the engine is running lean (too much air and not enough fuel), the O2 sensor generates a low voltage signal that tells the engine computer more fuel is needed. When the engine is running rich (too much fuel and not enough air), the O2 sensor produces a higher voltage signal that tells the engine computer the engine is getting too much fuel and to cut back the fuel delivery. On vehicles that have an Wide Ratio Air/Fuel sensor (WRAF) or A/F sensor, the sensor tells the computer the exact air fuel sensor so the computer can increase or decrease the fuel delivery as needed.
Accurate fuel trim values require an accurate feedback signal from the Oxygen sensor, otherwise the engine computer has no way of knowing whether the fuel mixture is running rich or lean.
When a cold engine is first started, it may take 10 to 30 seconds or more for the heaters inside the oxygen sensors to warms the sensors up to operating temperature. Until that point is reached and the fuel feedback control system goes into "closed loop", the fuel mixture is fixed at a predetermined value so no fuel trim adjustments are made. But once the Oxygen sensors are hot and the coolant temperature is high enough for the computer to go into closed loop, the computer starts to generate fuel trim values and make adjustments in the fuel mixture.
When the engine is shut off, the fuel trim values are retained in the computer's memory so the next time the vehicle is driven it can pick up where it left off. Erasing the computer's memory with a scan tool or by disconnecting the battery or the PCM power supply to clear codes also wipes the fuel trim values, which means the computer has to start learning the fuel adjustments all over again the next time the engine runs.
How to Read Fuel Trim
The fuel trim value is read by plugging a scan tool into the OBD II diagnostic connector located under the instrument panel (on the drivers side near the steering column). When the key is turned on, the scan tool will initialize and start to communicate with the vehicle's onboard computer. Depending on the tool and the vehicle, it may be necessary to enter the vehicle year, make, model and engine VIN code before the scan tool can read the data.
The engine must be started and running to read the fuel trim information. Depending on the scan tool and how its menu options are set up, you choose the option that allows you to read system live data. This will display a long list of sensor outputs and other readings called PIDs (Parameter IDs). On this list will be two fuel trim values for inline four and six cylinder engines, and four fuel trim values for V6 and V8 engines (one pair for each cylinder bank).
There are two types of fuel trim values shown:
Short Term Fuel Trim (STFT) is what the engine computer is doing to the fuel mixture right now.
This value changes rapidly and can bounce around quite a bit depending on engine load, speed, temperature and other operating conditions).
Values normally range from negative 10 percent to positive 10 percent, though the readings may jump as much as 25 percent or more in either direction.
Long Term Fuel Trim (LTFT) is a longer term average of what the engine computer has been doing to balance the fuel mixture over a predetermined interval of time.
This value is a more accurate indicator of how the fuel mixture is being corrected to compensate for changes in the air/fuel ratio that are occurring inside the engine.
STFT B1 is Short Term Fuel Trim engine cylinder Bank 1
STFT B2 is Short Term Fuel Trim engine cylinder Bank 2
LTFT B1 is Long Term Fuel Trim engine cylinder Bank 1
LTFT B2 is Long Term Fuel Trim engine cylinder Bank 2
Bahot badiya samjaya h bhi jaan aapne aise hi aap vedio banaya karo
boht hi simple aur zabardust veedio thans a lot
واہ a استاد محترم,
Excellent way to explain. ماشاء اللہ 💕
Mashallah bhai allah pak ap ko har moshkil say mhafoz rkhy ameen
Allah pak ap key family our ap ko
Sady Happy rky ameen
Nice and informative video. thanks for sharing
Boht khoob
bhai zabardast explain kiya mashahAllah
Good information video..
Masha allah bhai Allah ap ko mazeed kamyabian dey ameen.bhot arsa ho gya tha concept clear nai ho raha tha aj clear hoa.kaza kallah.
MashaAllah
zabardast
Bhoot allah bai jan
Very nice 👍 and informative
Good information bro 🇵🇰🇰🇼
Good and informative video 👍👍
Good❤
Jazak Allah
Bhut aaalaa video
Very nice bro.good efforts to teach others
Good work 👍
❤❤
Outstanding
Great information ☺️
Informative
Good work bro........keep it up........plz let us know which sensor provide short term fuel trim info and long term fuel trim info(O2 sensor bank 1 and O2 sensor bank 2)...?
Bank 1sensor videoa dekho
MaShaAllah ❤
Mashallah ustad jee
Which OBD device you are using to connect from mobile? Please share complete model with price
Very good info,
Ustaad gee i first see ur youtube channel.
Main nay app ko video send ke hai plz zara daikh kr batain.. Eri gari petrol ziada kha rahee hai.
Very good
Mere pas Suzuki baleno hy wo phely long p 15km avg deti thi and per ab nhi de rai.
Injectors change krwa chuka hun, throttle body okay hy map sensor change krlia tp sensor bhi or fuel pump bhi masla wahi ka wahi hy 10 12 avg or city mai normal condition traffic pr ho(yani 50 60 speed) to 10 avg hy joky phyly 13 ya 14 hota tha.
Kia ap masla bta skty hyn.
Best
Good 👍
Buhat aala. Bhai ye android pe kaunsi app hay jismrn ye values show horahi hain? Plz bataden
بھائی یہ launch کی ڈیوائس ہے اس۔ کی ایپلیکشن ہے xdaige pro 3
Boss santro ki bataye value kiu ke santro mein O2 senser nhe hota
Ye ap kidr sy prh k bta re ho. Ap k pas efi ki book ha kia??
Thanks
Bhai liana ka idle main Injector pulse width kitni honi chaye?? For best fuel average???
2.2
Mairai pass honda civic 2000 VTI hai us Ka fuel average 4 km aRaha hai jab Kai mainai fuel pump,fuel filter,injector ,TP censor change kiay hain laikin koi farq Nahi Aya hai.plz guide karain
Bhai apki shop kahn hy??? Address den....every wagon turbo ki fuel average set ni ho rhi....or gari ki pick bi low hy
Good
Bhai nissan moco ka tp sensor ko adil potion kya hoti hai malti meter pr
Bhai ap ki workshop kdhr ha kon sey City ma
Samaj nhi ai bhi saab... Step by step batain long term or short term problum ko fix karna.. Kya elm 327 OBD2 use kart saktay hain
Bhai Carolla ki throttle reset krny ka treeqa bhi btain scanner pe please
@Tazeem sajjad thank you very much jazak Allah
Ustad g bahot shukrya plz 1 video practical pr smja dy
Lagta Hy video ap ny pori nai dekhi
Ustad g dakhi hn lkn umeed hn. 2,3 dfa aur dakho ga smj LG jy gy .
پریشان نہ ہو میرے بھائی ہزاروں دفع پڑھا سمجھا لیکن پھر بھی سمجھ میں نئی آتی تھی ا جائیں گی میں کوشش کرونگا اور ویڈوز اسی پے بنانے کی
ان کو سمجھنے میں جتنا وقت اور ٹائم لگا تھا اب اس کا سمر مل رہا ہے اب گاڑی کی فیول مائیلج کو ٹھیک کرنے میں پریشانی نئ ہوتی کھڑی گاڑی پر اسی وقت پتا چل جاتا ہے کتنی اوریج دے گی
G ustad g asy hi hn ap ny bhot mahnat krny ky bad ya phal hasil kiya hn Allah ap ky ilam ma aur iafa frmay . Aur ap hum logo ki madad kr rhy hn Allah ap ko is ka ajr dy ga inshallah.
dear which scanning app are you using?
Aaip ki shop lahore mein ha
Sir Plz Toyota cars ke liye scaner ka name batayen
Assalamu alaikum bhai yeh kaun si app hai
Oxygen sensor ko check krny ka koi tarika bta dyn
Ge
ویڈیو میں جب انٹیک کا پائیپ اتارا کر اوکسجن سینسر کے وولٹیج زیرو کی طرف اور جب ریچ کریں گے تو 80 سے اوپر اور اگر سیکنر پر چیک کرنا ہو تو 2500 رپم پر 1 سیکنڈ میں 3 بار ریڈنگ چینج کرے گا
Ustad g bahot shukrya plz 1 video practical pr smja dy.
Bhai vitz 2015 average kam derhi hai guide kro kya masla hoskta ha idling bhe rough ha kafi
Scanner lagwa k reading bhejo
Bhai suzuki every hai uss ki short fuel trim + orr - hoti hai lkn long fuel trim -14 hai reason kya ho skta hai
Air filter injector cat
Collent ye chzain check karin
@@desiefiautoelectrician7150 OK bhaaiiiii thank u
@@desiefiautoelectrician7150 Honda life ghari hai uss k Map sensor ki pinout btaa skty 3 wire wala. P0108 ka code hai sensor change kiya wireing b conform ki ECM tk sub theek.
Sensor ki kessy ny grip change ki hoii thi mujy lgta hai wires olti lgaii hoii hai kesi ny. Ap btaa do k senso ki konsi wire pr kya volt ayy gy. Volt ka pta to hai mujy lkn konsi pin pr ayy gy ye nai pta 5 volt b hai Ground b hai orr signal wire b hai
What scanner are you using, can you share the model and also where did you get it from?
Launch easy daige 2.0
available in lahore
long and short trim -14 h kia problem ho sakti h
Wats up 03068632831
Work shop Kahan hai aap ki
60% air 40% petrol good mixture
🙏❤👌🌹
ye mobile softwear ya app kase mily ga
Main vvti ki video upload karon ga aap check karna
Bhai video ma aap Sirf Rpm aur 02 sensor ki reading dikharahy ha jabky apko long term aur short term ki bhi reading show Karni chaheye takey sab ko practically Nazar bhi aae abhi Sirf samajh Aya ha Nazar nae araha
میرے پیارے بھائی زرہ دوبارہ ویڈیو دیکھو نظر بھی ا جا ئیں گی
Bhi ka mobile wgera mill sakta ha kya
واٹس ایپ 03068632831
Agar long or short tirm -10% hoto kia krna chhaheay?
Fuel pressure check kro 50 psi sy zaida nai hona chaye
Catalytic converter band ho sakta Hy 50%
Thermostat ghari m na ho TB bhi - ma reading ATI Hy
Tappet jam hon intake waly tab bhi - reading aye gi
Air filter low quality m ho TB bhi ghari rich chali Hy
Pcv ya phir EVAP system close m stuck ho Jaye TB bhi rich ho gi reading
@@desiefiautoelectrician7150 cat kevjali nikli hoi h
صبح واٹس ایپ پر رابطہ کرنا بتا دونگا
03068632831
Aoa
RPM bhee bohot low hain idle per
well done sir g mobil numer send krna
Bhai apko gari check krwani ho tu???
بھائی میرے پاس آنا مشکل ہے آپ پرابلم بتا دو اگر میرے علم میں جو ہوگا اتنا میں آپ کو گائیڈ کر سکتا ہوں
Shop address send
😄😄😄😄😄😄🧡🧡🧡🧡🧡🧡🧡🧡
Sir plz ap ka namber mil sakta ha
03068632831
آپ کا واٹس ایپ نمبر کونسا ہے
03068632831
03068632831
@@desiefiautoelectrician7150 apki shop kidr ha???? Lahore ma ho koi????
آپ اپنا نمبر
Outstanding
Good 👍