Toyota Corolla Fuel Mileage Problems | Long Term Short Term | Desi Efi Auto Electrician

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.
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.

[@mianasadmahmood9092]

truly professional info...........great sir g

[@ishtyaqali5164]

Waw excellent information thank you bai very good

[@muhasida]

mujhe bohot shoq hai gari ki tuning aur apni gari k kaam khud karne ka.. mein tou apka FAN hogaya hun kasam se, MA SHA ALLAH zaberdast diagnosis hai aapka ALLAH apko bohot taraqqi de. Apne gariyuun ki knowledge kahan se lee hai?

[@AA-nl9xt]

اسلام علیکم بھائی جان بہت زبردست انفارمیشن والی ویڈیو بنائی ہے آپ نے مگر آپ بھول گئے کام کرنے کے بعد والی ایوریج نہیں دکھای..

[@faisal3374]

main ny 2007 axio ka fuel pump main filter change krwaya ta os ky bad fuel tank main airlock ka issue arha hai ,

[@daimhussain1407]

Aoa Plzz ya BTA dein ky injector ko spray ksy krwaya or check bansuri prr lga ky. Krna chaiya ya nhi us ky liya clip bna dein .sukriya

[@manshajaved8196]

Corolla 2008 1.6L Showing long trm -30 at tdle speed and -28 at 2500 RPM . Shory term + 6 at idle and -3 at 2500 RPM. Bhai can you help to solve if this is not correct

[@ishtyaqali5164]

Excellent

[@mehboobsahil585]

Bro Toyota altis ke stering angle sensor ke bary me bhi video banaeye

[@farhanameer1771]

Brother meray pas 2005 Honda city idsi hai. First gear mai accelerator dubaye baghair agar clutch release kerain to rpm drop hona shuru ho jatay hain iski kya waja ho sakti hai

[@Bakar-edits1]

Yeh normal c bat hy har gari me ese hi hota hy

[@waseemishfaqtechnicalworld7481]

Sir suzuki bolan ke feull mileage pr video bnao wiht sacenr seting our kiya mileage pr letar

[@desiefiautoelectrician7150]

18 sy 200km pr litre

[@desiefiautoelectrician7150]

بن گئ ہے اپلوڈ ہورہی ہے

[@afnanhamid9299]

Bilkul genuine tariqe se jese company ne. Laga kr diya h

[@khanshamim38]

Bhai apki video sy andaza hua h k ap aik samjhdar electrian ho. Ab m apka channel subscribe krn ga.

[@desiefiautoelectrician7150]

اچھا سر شکریہ

[@khanshamim38]

@@desiefiautoelectrician7150 m ny apsy aik swal pochna ta. Meri cultus efi wesy tu 17km/l average deti h without AC on highway lakin uski fuel trim -15% arahi h. Ye thk h ya kahan masla ho skta h?

[@desiefiautoelectrician7150]

یہ abnormal ہے یہ ریڈنگ آپ نے سٹارٹ کھڑی گاڑی ہے لی ہوگی اس میں آپ چیک کریں کیٹا لائیٹک کنورٹر انجن کولنٹ یا پھر ٹیمپریچر سوائیچ ہو سکتا ہے

[@khanshamim38]

@@desiefiautoelectrician7150 temperature switch kis ka coolant temperature sensor ka intake air temperature sensor ka? Wesy fan direct h mera

[@khanshamim38]

@@desiefiautoelectrician7150 bhai apki workshop kis city sy h aur apka mobile no kia h

[@arifmaknojiya8617]

Bhai your work best

[@mdafsarhossin1250]

nice information bhai ❤

[@coolwind80]

Sir mere pass vitz 1300cc automatic ha fuel injector bhee clean karwaye han complete tuening bhee karwaye ha phir bhee 10km per liter on long without ac de rahe ha average. Kia kya jae k average ache ho jae

[@desiefiautoelectrician7150]

Engine pressure bhe check krwao our scanner long term dekho agr zaida - m hain to pher engine hi down hoga liken confirm krny ky lye compression test krwa lain

[@coolwind80]

@@desiefiautoelectrician7150 jazakAllah

[@muhammadrizwan-ku1yl]

MashAllah

[@adeeladeel8974]

Mashallah

[@abhijitbhattacherjee8019]

Very very nice sir thanks

[@asgharkhan1075]

Plz chk is these trims are ok like my fuel pump, filter nd injectors working fine? RPM LTFT STFT 1081 -16.41 2.34 1081 -16.41 -0.78 1081 -16.41 -0.78 1081 -6.25 -0.78 766 -6.25 -2.34 766 -6.25 -2.34 766 -6.25 -2.34 575 -6.25 -3.91 567 -6.25 -4.69 567 -6.25 -4.69 1513 -14.84 0.78 1589 -14.84 -1.56 1694 -12.5 1.56 1694 -12.5 0.78

[@salman-oj4qq]

Bhai apki workshop kidr hai

[@samsoongill2858]

Kya krna chy fule pump be change kr lya ha oxygen sensor be fule enjoter be wash krwa lya ha liken kuch fark Nie para

[@uzirnice8500]

Reysat bahi mera masla nahi hal hia idhr kisi b bandy se :(

[@AleeRaza123]

Bro d15b coil engine dala hwa 98 civic m average 10 11 krta max on highway improve ho skta ?

[@javedakhtarjavedakhtar4366]

Thanks Sir

[@khankhan95]

AoA Bhai baleno Suzuki 1.3 kitni mileage dyti hy per liter with AC

[@khandady2]

Very good

[@shafiqueahmedmalik9809]

great sir g

[@zeshanafsar2998]

Bahi marey xli k slinser. se badboo atey ha kaya masla ho Sakta ha

[@meherbaanenterprises2734]

Meri pas 2016 model 1.6 corolla hai iski short trim +20 or long trim +27 ati hai kya ye thek position pr hai ?

[@desiefiautoelectrician7150]

نہیں

[@malikamjad9918]

Ma sha allah bi nice video

[@abubakarsehane8313]

Toyota land cruiser ke koill Desi trial sy chik krnny ka Kam Corolla xli ky sem sem hi

[@Khan-ro8ct]

Very good dear

[@janjua.2937]

زبردست

[@wajeehulhassan2182]

i chked my car by scaner....maf reading was good short fuel trims was well within range going +3 to -3 But long fuel trim varied but was in the positve range only.... I changed my fuel pump yesterday also i have my injectors serviced.....is it ok or what should i do...

[@Bakar-edits1]

Now check back your values by scanner please and tell us

[@MuhammadQaseem]

app kis city say han ?

[@muhammadrizwan-ku1yl]

Brother good 👍

[@eshalmalik839]

sir gari he 2015 sb karwa lia he fuel averag nhi dye rahe koi code nhi he ap btio kia karo

[@desiefiautoelectrician7150]

Bhai scanner lagwa kr reading ki video bhejo 03068632831

[@eshalmalik839]

sir koi hal he btio ak na bolo he fuel ingecter chang karo me cal karta hun ap ko

[@jahanzaibautoelectrician9824]

Masha Allah

[@aneesahmad1985]

Ap ki awaz bht niceeee ♥️ Hai

[@8tyfour]

Ye jo aaap ne clip waala kaam kia hai ye ghalat hai. Is se pressure leak hota hai. Meri garri mein bhi aese he bhai ne tight kr k lgaiya tha lekin ye kaam nae krta mileage phr bhi theek ne hoti puri assembly change krni chahiye.

[@ziannadeem6492]

Good 👍 Boss

[@yousafzahid933]

Masha Allah v nice

[@CHAUHANRP]

apkai shop ka adress kiya hai plz

[@salmansaeed5284]

Amazing and aosem

[@MuhammadShahbaz-sg7ue]

Nice brother

[@samsoongill2858]

Helo sir Sir Ap ki workshope kaha pa ha

[@samsoongill2858]

Mara pass Toyota Corolla xli 2010 model ha ma na tune krwi ha us k bad fule avrge just 8km few little ha

[@javedch2238]

Bhai 2013 altis 1.6 hai avrg 9 km / L dy rahi hai auto iska kya hall hai ?

[@desiefiautoelectrician7150]

سب سے پہلے سیکنر لگواو دیکھو کوئی فالٹ کوڈ تو نہیں آ رہا اگر آ رہا ہو تو سب سے پہلے اس کو ٹھیک کروائیں اس کے بعد سیکنر سے ریڈنگ سلیکٹ کریں اور لانگ ٹرم اور شارٹ ٹرم کو دیکھیں انجیکٹر پورٹ وغیرہ انجیکٹر پورٹ آئیڈل الیکٹرک لوڈ آف 2.5 سے 2.1 ہونی چاہئے ائیر کی ریڈنگ 1.50gm ہونی چاہیے لانگ ٹرم 8٪ سے کم ہونی چاہیے

[@shoaibsheikh7305]

Dear what is your location mean k city?

[@ahsanarain4123]

Zabardast

[@manshajaved8196]

Nice vedio Corolla 1.6l m ye dono values kitni honi chahye idle speed p ? M apni car ka data b dekhu ga Per ap ka experience acha ha Masha Allah

[@khanshamim38]

Bhai dono values negative m honi chaye. Agar positive h tu injectors, plugs aur air leakage chack krn. Agar air leakage hui tu bhi gari petrol zayada ly g.

[@Javed-yz3gg]

Masha allh bhai

[@ranafaryadhussainadvocate4204]

Ap ki workshop kahan hy??

[@gamingmagnet8418]

Aapki shop kidhar hai meri car ki average 9km hai ac pe

[@creativeactivities1759]

Bhai gari Lahore Mn hy evrige ka hi msla Lahore Mn koi bnda bta do

[@desiefiautoelectrician7150]

03068632831 wats up

[@TheNayabsVlogs]

Normal GLI 2010 kitna average deti hia? Without ac loc main

[@desiefiautoelectrician7150]

14.8 Tak aor long m 15.8 Tak agr adjustment ya tune up thek tareqy sy hoi ho

[@TheNayabsVlogs]

Main ny tunning ki thi ab car 11 bari muskil sy diti hia.

[@eshalmalik839]

sir wo karachi k log pata nhi video banwna dye ga ya nhi ap kahan hota hen

[@desiefiautoelectrician7150]

Bahawal nagar

[@desiefiautoelectrician7150]

Ap wats up py masge kro Karachi m kuch janany waly hain un ka number dhondh kr ap ko deta hon Mera wats up 03068632831 wo ap ki pori rehnamye Karin gy

[@AbidAli-ct8yp]

Bai app ke workshop kidar hai

[@snk6782]

apki workshop kaha hai? mn ny ana hai

[@AliRaza-yt3ne]

Bhai plz Suzuki Liana per engine data list per ak video bana den

[@desiefiautoelectrician7150]

انشاء اللہ جلد ہی

[@murtazabandashamurtazaband3412]

Love u ji

[@desiefiautoelectrician7150]

Love u 2×2×2×2

[@muhammadrizwan-ku1yl]

Big fan

[@suhailautos010]

Data stream me O2 sensor 2 ki reading kitni honi chaye

[@desiefiautoelectrician7150]

0.2 sy 0.9 Tak very krta hy

[@FaizanKhan-cz6hy]

sir corolla 2015 sub kar lia he fuel problm he koi btio g

[@desiefiautoelectrician7150]

Wats up 03068632831

[@afnanhamid9299]

YaR r ap ne ye jo petrol filter k pipe magic or jublie clip lagai hai me bagair magic or jublie clip k ye petrol filter ka pipe laga k dikhao bagair isko garam kare

[@desiefiautoelectrician7150]

سرہر کیے ہوئے کام میں بہتری کی گنجائش ہوتی ہے

[@junaidsajid779]

Ye jo ap filter lga rhy ho is k sath to fuel prasher reles hota ha

[@junaidsajid779]

Mukamel asebmly change kia kro

[@fazibutt5993]

With out country code

[@waseemishfaqtechnicalworld7481]

I miss my ostad

[@atiquekaimkhani2852]

اسلام وعلیکم و رحمۃ اللہ و برکاتہ بھائی ٹیوٹا کرولا جی ایل آئی 1.3 آٹو میٹک 30ھزار کلو میٹر چلی ھے فیول ایوریج لونگ اور سٹی میں کتنی ھونی چاہیئے براہ کرم رہنمائی فرمائیں شکریہ

[@desiefiautoelectrician7150]

In city 14 plus long pr 16 plus

[@saoodkhan7109]

Sit japani Alto k data batao

[@ahamdarif823]

AA, Sir ap ka adress mil sakta ha meri wagn R b bht petrol khati ha.

[@ahmedalimian9597]

آپ کے پاس جو کچھ ہے اس کے لیے اللہ کا شکر ادا کریں۔ اپنی کار یا مشینری کی باقاعدگی سے دیکھ بھال پر توجہ دیں اور اسپیئر پارٹس خاص طور پر کار کے انجن آئل، ایئر فلٹر، آئل فلٹر، اسپارک پلگ یا گیئر سے متعلقہ جینیون پارٹس کا استعمال کریں (اگر آپ کار خرید سکتے ہیں تو آپ کو دیکھ بھال کے لیے بھی خرچ کرنا ہوگا). ویڈیو میں اس مسئلے کے لیے میں آپ سے درخواست کروں گا کہ ایک پیسہ خرچ کیے بغیر اسے 5 منٹ کے اندر خود ٹھیک کریں۔ کار ایئر فلو سنسر کھولیں (اگنیشن میں کار کی چابی کے بغیر) اسے پی سی بی کلینر یا تھروٹل اسپرے کریں اور ہلائے بغیر اچھی طرح خشک کریں۔ بیٹری کے منفی ٹرمینل کو 1 منٹ کے لیے ہٹا دیں، پھر اسے پلگ آن کریں اور پھر انجن کو آن کریں۔ کار کا RPM نارمل سے زیادہ ہو گا لیکن یہ 3/5 منٹ میں کم ہو جائے گا انشاء اللہ۔ آپ اس عمل کو ہر 3 سے 4 ماہ بعد باقاعدگی سے دہرائیں، اس سے آپ کی گاڑیوں کو کبھی کوئی نقصان نہیں پہنچے گا اور اس سے انجن ایئر فلو سسٹم کو فروغ ملے گا انشاء اللہ. بہت سے مسائل آپ توجہ/وقت دے کر خود ٹھیک کر سکتے ہیں۔ احمد علی میاں - ابوظہبی.

[@shafiqueahmedmalik9809]

apki place kis city ma ha

[@desiefiautoelectrician7150]

منڈی صادق گنج بہاولنگر پنجاب

[@awaischaudhary5919]

♥️♥️♥️♥️♥️♥️

[@lospolloshermanos1863]

Bhai app ki work shop kahan hai

[@desiefiautoelectrician7150]

منڈی صادق گنج بہاولنگر

[@ArifKhan-ww4pb]

Bhai apna what s up nmbr send kr do plz

[@shafiqurrehman3890]

your workshop address pl.

[@desiefiautoelectrician7150]

Bahawal Nagar

[@maqboolmaqbool1803]

گاڑی ہے سوزوکی چیمبر لونگ ٹرم 0%وولٹیج بتا رہا ہے فیول پمپ چینج کیا دونوں فلٹر سلینسر اگسیجن سینسر پلگ اور انجکٹر سب کچھ صاف کیا لیکن وولٹیج سم ہی ہے

[@desiefiautoelectrician7150]

سر واٹس اپ پے رابطہ کریں 03068632831

[@afnanhamid9299]

Ap kara chi k ho?

[@desiefiautoelectrician7150]

بہاولنگر

[@nasirabbasnasirabbas5387]

O bhai fon te atnd kia kro janab...hr reply bhi do yar

[@desiefiautoelectrician7150]

بھائی آج موبائل بند ہے جمہ مبارک چھٹی ہے صبح انشاء اللہ

[@xpressmusikkk]

Chal vaee riasat mistri lamma ho

[@msdmsd3514]

Gussa uska ji aapka WhatsApp ka number kya hai

[@mrusman8386]

Sir apka adress kya hy

[@desiefiautoelectrician7150]

منڈی صادق گنج بہاولنگر

[@mrusman8386]

@@desiefiautoelectrician7150 sir Mery pas toyota gli 2009 hy 10 w 40 X5 engine oil dala hy shell ka 2600 kilometer chlae hy oil kam Kea Hua hy kya problem ho sakti hy ya acha engine oil recommende kren

[@desiefiautoelectrician7150]

03068632831 واٹس ایپ

[@fazibutt5993]

Abdullah Bhai please apna number send krna

[@desiefiautoelectrician7150]

03068632831

[@inamrehman8709]

Assalam O alaikum.. bhai ap apna mobile number send kar do, ap se kuch pochna ha..mere gari xli 2010 model me Long term ki value -16% ha, aur short term ki value ± 3% ha, lakin gari ki pick itni khas nahi, aur pehle gear me jab gari ko move karte hai, tho gari ki power nahi rehti.

[@desiefiautoelectrician7150]

03068632831 AP ki ghari heat hoi ho gi giskit change krwai ho gi us wajha sy pic bhi Kam Hy or mileage bhi low ho gi

[@inamrehman8709]

@@desiefiautoelectrician7150 gari heat nahi hovi, na hi gasket change kiya ha, engine overhaul karwaya ha, pehle oil kam karti thi, gasket ka issue hota, tho air intake me masla hota, aur rpm be stable na rehte. aur gari lean chalti.. i think may be catalytic convertor block ho, ya pir air ya oxygen sensor sahi kaam na kar raha ho.

[@muhammadnomansiddiqui3185]

Sir apki shop kha hai

[@desiefiautoelectrician7150]

منڈی صادق گنج بہاولنگر پنجاب پاکستان