Sir g, iss mein do reasons ho sakti hein:- 1. Air leak: MAF sensor k baad se ley k intake manifold k engine block k attachment point tak kahein bhee (injectors port pe bhee air leak ho sakti hae...phir purge valve open pey stuck ho ya phir brake booster k diaphragm internally leak ho ya phir EGR valve open pe stuck ho....inn sub ki wajha se engine air suck karey ga jo MAF sensor nahein read karey ga to gari mein sir ziada ho gee aur fuel MAF ki reading k hisab se ja raha ho ga jo k kum ho ga...issi liye gari lean chal rahi ho gee aur computer oxygen sensor ki feedback pe fuel trim ko positive kar k fuel injector pulse bhara raha hae... 2. Fuel supply kum ho to bhee fuel trim positive mein aey gee... Mazeed aap neechey diye gaey tareekey se exact fault maloom kar saktey hein: ab aap agar fuel trims ka live data dekhtey huey RPM ko 2500 pe rakhein aur fuel trim minus mein aa jaey ya idle wali positve value kafi kum ho jaey to iss ka matlab ho ģa k engine k kissi hissey mein air leak hae jissey hamare mecganic ""gari saans ley rahee hae" boltey hein. Aur agar trim pe koi khas farq nahein parta to yeh fuel supply yani injectirs mein ya phir pump filter mein ya to katchra hae ya phir pump ya uska regulator khatam hae
Oxygen sensor tu close loop k lia hota hai.. jab pura throttle khulta Hai tu open loop mei ecu lambda rating per chalta hai phir Oxygen sensor ko ignore kerta hai phir system
Saheh....issi tarah thandi gari bhee open loop mein rahey gii jab tak k O2 sensor apney working temp (300 se 400 c for narrowband & 500 se 600 c for wideband) pe nahein pohunch jata
Sir g, yahan samajh nahein aaee k aap kìya point out kar rahey hein....thora explain kar dein to mera khayal hae k discuusion aagey barh sakti hae.... I am too late to comment on ur 2 years earlier comment...but i hope u wont mind
Bhai try achi ti apki. M appreciate krta hn. Lakin thora sa ap confuse ty. Jin logo ki fuel mileage achi ni h wo zror fuel trim ko samjhy. Agar apki fuel trim +5 sy zayada h tu apny injectors, plug check krn ya air leakage check krn. M ny Alhamdullilah apni cultus efi 2008 ki aesy h milage improve ki ti ab 17km/l average h. Mera masla sirf air leakage ka ta. Electrian inn baton p dhayan ni dety ap khud check kro kun k petrol bht mehnga ho gya h. Meri fuel trim negative m arahi h mtlb ecu petrol bacha ra h ab.
Sir,, baki sub aap ney theek bola per aakhiri do linon mein aap bhee cofuse kar gaey... jab ECU fuel trim negative mein batata hae to iska matlab hae k ECU ko oxygen sensor rich exhaust ki feedback dey raha hae....negative trim se murad ECU fuel supply subtract yani kum kar raha hae...aur yeh kaam woh injector pulse ko kum karnèy se karta hae
I am enjoying your comments... Faisal bhai ney engine performance kissi se parha nahein hua....yes he is confusing lot many concepts...yet he knows how to diagnose a fault code and troubleshoot a circuitry issue....iss domain mein, he surpasses our màny electricians...lets dont discourage his efforts.... Stay blessed dear❤❤❤....i am happy to know about your knowledge on subject thru your comments
Mashallah good information ❤
Masha Allah v nice sir
alah pak kush rakahe..sir aap ko
You are great......💖💖💖💖
Good information faisl bhai
Boht Khoob
Allah Hafiz Ustad
Very nice
Nice video
Mash Allah nice
Cold start mei Open loop hota hai.. engine warm honey k bad wapis close loop hota hai... Or phir wide open throttle Yani WOT pe Open loop hojata Hai
Saheh....oxygen temp auk khas temp pe pohnch k apna kaam shuru karta hae
Nice
Normal rpm pa kitna long our short
Trim hona chai or v8 v6 our 4 salndr sub ke sam reading ho gi
Toyota corolla 2010, ki long trim ki value +15 say +25% kai darmiyan vary kr rahii.. plz advise khaa issue hosaktaa.. ? Nd short trim +-3% chal rahi.
Sir g, iss mein do reasons ho sakti hein:-
1. Air leak: MAF sensor k baad se ley k intake manifold k engine block k attachment point tak kahein bhee (injectors port pe bhee air leak ho sakti hae...phir purge valve open pey stuck ho ya phir brake booster k diaphragm internally leak ho ya phir EGR valve open pe stuck ho....inn sub ki wajha se engine air suck karey ga jo MAF sensor nahein read karey ga to gari mein sir ziada ho gee aur fuel MAF ki reading k hisab se ja raha ho ga jo k kum ho ga...issi liye gari lean chal rahi ho gee aur computer oxygen sensor ki feedback pe fuel trim ko positive kar k fuel injector pulse bhara raha hae...
2. Fuel supply kum ho to bhee fuel trim positive mein aey gee...
Mazeed aap neechey diye gaey tareekey se exact fault maloom kar saktey hein:
ab aap agar fuel trims ka live data dekhtey huey RPM ko 2500 pe rakhein aur fuel trim minus mein aa jaey ya idle wali positve value kafi kum ho jaey to iss ka matlab ho ģa k engine k kissi hissey mein air leak hae jissey hamare mecganic ""gari saans ley rahee hae" boltey hein.
Aur agar trim pe koi khas farq nahein parta to yeh fuel supply yani injectirs mein ya phir pump filter mein ya to katchra hae ya phir pump ya uska regulator khatam hae
Normal rpm pe kitna long aur short trum hona chaia
Assalamwalikum
Hawa ki miqdar ziyada hogi tu engine lean hoga or garam bhi ziyada jaldi hoga
Saheh...aur knocking bhee karey ga jo k eñgine k rich chalney se ziada khatarnaak hae
Oxygen sensor tu close loop k lia hota hai.. jab pura throttle khulta Hai tu open loop mei ecu lambda rating per chalta hai phir Oxygen sensor ko ignore kerta hai phir system
Saheh....issi tarah thandi gari bhee open loop mein rahey gii jab tak k O2 sensor apney working temp (300 se 400 c for narrowband & 500 se 600 c for wideband) pe nahein pohunch jata
ECM sirf petrol ko Kam ya ziada krta he Air ko accelator Kam ya ziada krta he
G, bilkul....aur sath mein ignition ya spark advance ko bhee adjust karta hae....ta k optimum fuel average or driveability milley
Oxygen sensor konsa Bhai..
Narrow band ya wide band?
Schio , lambda or voltage ka chart hota hai k gas per kia rating hogi, Diesel pe kia hogi , high octane pe kia hogi
Sir g, yahan samajh nahein aaee k aap kìya point out kar rahey hein....thora explain kar dein to mera khayal hae k discuusion aagey barh sakti hae....
I am too late to comment on ur 2 years earlier comment...but i hope u wont mind
اسلام علیکم سر جی سوزوکی کیری ہے لونگ ٹرم گچھ ویلو نہیں بتا رہا ہے پلیز ہیلپ
jis car ma oxygen sensor na ho wo kese check ho ga???
Bhai try achi ti apki. M appreciate krta hn. Lakin thora sa ap confuse ty. Jin logo ki fuel mileage achi ni h wo zror fuel trim ko samjhy. Agar apki fuel trim +5 sy zayada h tu apny injectors, plug check krn ya air leakage check krn. M ny Alhamdullilah apni cultus efi 2008 ki aesy h milage improve ki ti ab 17km/l average h. Mera masla sirf air leakage ka ta. Electrian inn baton p dhayan ni dety ap khud check kro kun k petrol bht mehnga ho gya h. Meri fuel trim negative m arahi h mtlb ecu petrol bacha ra h ab.
Sir,, baki sub aap ney theek bola per aakhiri do linon mein aap bhee cofuse kar gaey... jab ECU fuel trim negative mein batata hae to iska matlab hae k ECU ko oxygen sensor rich exhaust ki feedback dey raha hae....negative trim se murad ECU fuel supply subtract yani kum kar raha hae...aur yeh kaam woh injector pulse ko kum karnèy se karta hae
Long trime -15 ja rahi h kaya check krna pry ga
لانگ ٹرم کی ریشو -14میں آ رھی ھے ویگن آر کی کن چیزوں کے ٹھیک کر کے اس کی ریڈنگ 0 کے قریب کی جا سکتی ھے
14.7:1 ka ratio batao na bhai
Or phir ye k
Yeh ratio rich hai ya lean
Its Stoichiometric ratio for internal combustion engines....neither lean nor rich😊
Oh Bhai..
Open loop
Close loop
Throttle position
Ye sb kaha gya?
Mei sikha do sai se
Oxygen sensor tu 4-5v tak ki rating dega uskai bad kia Hoga kaliya 😂 phir lambda Hoga uski rating open loop pe chale injector pulse
I am enjoying your comments...
Faisal bhai ney engine performance kissi se parha nahein hua....yes he is confusing lot many concepts...yet he knows how to diagnose a fault code and troubleshoot a circuitry issue....iss domain mein, he surpasses our màny electricians...lets dont discourage his efforts....
Stay blessed dear❤❤❤....i am happy to know about your knowledge on subject thru your comments
Or jin gariyo mei oxygen sensor nhi hai us mei a/f ratio kaise adjust Hoga??? 😂
Close loop hoga ya open loop?
santro ka kese pta chale ga
@@AliHaider-hq4kf scanner se
Short term
Long term
And injector pulses
@@Anon_PK scanner ma long or short term nhi ati santro ki q ki us ma oxygen sensor nhi ha
@@AliHaider-hq4kf Bhai AFR ratio show nahi kerega likin fuel trim show kerega or injector duty cycle piyarey bhai
@@Anon_PK 4.1ms injectors pluse hn idle pa
Sorry ustad jakai desi jugaro kam kero
Yeh apka game nahi Hai. Sorry
Sub ghalat bata ra ha Bhai
ap na sono kya zarort hy
You are great......💖💖💖💖
Good
Nice