Ask Xulfiqar - An Automotive Encyclopedia

[capsat]

Mehran is very simple plain basic car.

check for the PCV valve condition clean or replace it.
Also you can visit workshop which can perform compression test, wet & dry readings will determine reason of oil reduction. valve seal leak or bad rings are basic cause of oil reduction.

oil change interval depend over your driving style and driving conditions. always refer to owner's manual for vehicle maintenance.

[abdkhan2]

@Xulfiqar @capsat Do maf sensor gives reading with ignition on and engine off which is.7v,where as ideally its 1.1v on idle. CAR IS COROLLA 2004 1NZFE

[saqibhassan95]

Cultus ags 2018, 27k odo
I am facing some issue with cultus ags, in noon mostly , with ac on while creeping mostly, the car jerks and does missing, can anybody guide me?Like in traffic jams or when moving slowly from stop, depressing the brake ,the car moves by itself and then vibrates
It has to do something with higher temperatures? Pls help
@Xulfiqar

[abdkhan2]

Any expert?

[capsat]

at ignition off there shall be no voltage at MAF. 1.1 at idle is perfect., check for any wire fracture / damage please.

[abdkhan2]

No with ignition switch on and engine off.

[abdkhan2]

At idle its 1.7v. whereas it should be 1.1v

[capsat]

was it cleaned by ustaad in recent past to teeeeyon the car?? the filament sensor is sensitive to ustad cleaning methods.

[abdkhan2]

Yes it was cleaned using carby cleaner, since then its messing.Can we do any resistance test on it?

[Xulfiqar]

See it on a diag tool

If the air mass reading is out of whack, replace part with brand new part

i have seen thousands of sensors destroyed by shooting carb cleaner into it, specially if the car was run 5 minutes before, next time tell mechanic its his responsibility if any part fails after cleaning and see them immediately become straight as arrow

[abdkhan2]

Means maf dont give any value if engine is off and ignotion is On.

[Xulfiqar]

it does, it should show 0 gms/sec - if it has any value above 0 gm/sec in MAF PID data of scan tool with key on engine off, the sensor is bad. (most usually killed by cheetah qism ka ustaad)

[saqibhassan95]

Both tyres are of same size, can anyone tell how difference in tread pattern of both tyres will result in actual daily life performance? (In Wet/dry grip, noise levels, wet/dry braking etc) @Xulfiqar

Yokohama Aspec

Yokohama bluearth AE-01

[overspeed111]

@Xulfiqar @capsat
Sir i was fiddling with the khyber/Swift 1990 defogger Wiring it was not connected earlier, it have switch in dashboard for defogger on/off and defogger at rear screen but wiring was all messed up cut from many places i've fixed it and something/circuit was missing which used to wire up in the trunk lid as i found connector in trunk lid without any thing connected,

does defogger operate at 12V? as i connected wiring and switch on the defogger button 12V positive/live wire show current in trunk lid and two more wires are connected from switch to trunk lid but don't know their purpose neither of two wires show any current, total 3 wires go from switch to trunk lid one is positive and two others don't show current and some circuit was missing in trunk lid, please help me to wire up all this as i created a mess

[hamkapadia]

Assalam o alaikum ,My Mercedes ml320 is not shifting gear and speed is not crossing 60 ? Any solution? Or advice?

[capsat]

kindly share the pictures of wiring.

in the mean time refer and read this thread / this thread and this for guidance

[capsat]

My Mercedes ml320 is not shifting gear and speed is not crossing 60 ? Any solution? Or advice?

walai kum usalam

any known maintenance history during past 2 months or so. Do you have access to a workshop which can scan a mercedes.

[hamkapadia]

I've just bought it on the condition of this issue clearance,, I went to a Mechanic today it's some circuit issue

[Xulfiqar]

Im going to assume its older model,which has the old 5 spd automatic. Usual issue in them is the conductor plate which has both speed sensors gets damaged and the tcu shuts all shifting.

You need a brand new conductor plate (not from scrap), brand new wiring connector housing, some atf and a scanner to reset the tcu (cheap handy scanner doesnt work)

Quite simple job

[Vaqas1]

Aoa @Xulfiqar bh, I bought a Nissan Roox Highway star 660cc for my friends mother its a 2014 CVT and 55k driven. During 90 km drive on hot day with AC few times the Car D light starts blinking and car loses power. The gear oil is clean a bit over filled it seems. Stick says cvtf. I am goin to get ecu scanning for codes. Can overfill cause this? Or maybe previous owner did not use cvtf.