Ask Xulfiqar - An Automotive Encyclopedia

[Docjunaid]

take it back to the 3S and get them to correct it if they screwed it up, the throttle requires recalibration. I usually dont understand why everyone loves to mess with that bit of the engine.

@xulfiqar
Bhai jan i did reset the ECU in the morning, now car is working fine. No engine high rev now

Why this is so, i cant explain may b u can

[Xulfiqar]

Rotated tires, noise moved with it. Replaced the faulty tire and there is no more noise

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always aim for the simplest first.

@Xulfiqar
Bhai jan i did reset the ECU in the morning, now car is working fine. No engine high rev now

Why this is so, i cant explain may b u can

ECU is now relearning everything again.

[tyrone_40]

why do you need it cleaned anyway? Make it look shiny? The older models had idle control ports and also breather ports which could plug up if the engine never saw a highway run - even those required seldom cleaning.

The calibration bit is for the electric motor throttle. When you clean it out it tries to adjust back to its "dirty" value but as more is passing the feedback is incorrect hence CEL.

for old styles - if it was cleaned then it is mandatory to lubricate the idle motor with spindle oil, ATF or hydraulic oil - leave the tip dipped for about 2 hours - it soaks the oil which is required for smooth operation.

Because of.the carbon buildup. Are you saying there is no need to open up the throttle body as these mechanics here recommend ?

[margallar]

on bumpy roads, a squeaking noise is heard from the rear of the car (i think right hand side), sounds abit like the sound heard when a coin is dropped. what part could be causing this noise, its annoying

[DUDE007]

on bumpy roads, a squeaking noise is heard from the rear of the car (i think right hand side), sounds abit like the sound heard when a coin is dropped. what part could be causing this noise, its annoying

I'm having the same problem but its on the rear left side; when someone sits in left passenger seat(front and back) the squeaking sound is heard. And also on speed breakers and bumps. Will WD40 cure this?

[shahid217]

Xulfiqar bhai I hv a general question... what is the fuel efficiency of v6 2.4L engine? Car in question is actually Galant V6...

[dms664]

why do you need it cleaned anyway? Make it look shiny? The older models had idle control ports and also breather ports which could plug up if the engine never saw a highway run - even those required seldom cleaning.

The calibration bit is for the electric motor throttle. When you clean it out it tries to adjust back to its "dirty" value but as more is passing the feedback is incorrect hence CEL.

for old styles - if it was cleaned then it is mandatory to lubricate the idle motor with spindle oil, ATF or hydraulic oil - leave the tip dipped for about 2 hours - it soaks the oil which is required for smooth operation.

3s guys ask me on every check up to clean thraatle baady but I bade them to touch it and they grade me as neem hakim parha likha mistri who is shortening his car's engine life by nt cleaning thrtle bdy.

PS I think ocassnl motorway n highway drive coupled with casual adrenaline rush high rev local drive ll keep the carbn deposits away, no?
I might b rong

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[a_n_memon88]

Rotated tires, noise moved with it. Replaced the faulty tire and there is no more noise

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Did you notice what kind of fault was in the tire.

[a_n_memon88]

3s guys ask me on every check up to clean thraatle baady but I bade them to touch it and they grade me as neem hakim parha likha mistri who is shortening his car's engine life by nt cleaning thrtle bdy.

PS I think ocassnl motorway n highway drive coupled with casual adrenaline rush high rev local drive ll keep the carbn deposits away, no?
I might b rong

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Thratle baady cleaning is required because a mechanic can make 2000 rs from it that is why it is most important.

[fahadwizz]

Did you notice what kind of fault was in the tire.

According to the tire wala it had a broken belt inside.

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[fahadwizz]

@Xulfiqar

This problem is with a friend's car. Its a 2001 Corolla XE, 130k driven.

Very well maintained. The problem started with a little heat up during hot afternoons. We serviced the cooling system by performing a proper flush, replaced thermostat and refilled with original Toyota coolant. The car maintains idle operating when ideal or if being driven at normal speed <80kmph @ low RPMS. As soon as we raise the RPMS and bring the car to 100kmph with RPM of 3+ it starts heating up and the needle moves a little over half way. If the speed is reduced at this point, as the RPM drops the needle comes down to halfway. If the car is stopped and left to idle for a 2 minutes the needle gets back to its standard position which is a little below half way mark. The problem occurs with or without AC.

Thermostat is original Toyota rated 82C, Car has been driven throughout on synthetic motor oil. Plugs were recently replaced with standard NGKs. Fan is also working fine. Since it heats up only at high speeds and not while idling in trafic we have ruled out the possibility of a bad fan. We checked the timing and it is within specified range and there is no pinging/knocking. Radiator is original Toyota which came with this model in is great condition. Water level does not decline.

Kindly advise!

[Xulfiqar]

@Xulfiqar

This problem is with a friend's car. Its a 2001 Corolla XE, 130k driven.

Very well maintained. The problem started with a little heat up during hot afternoons. We serviced the cooling system by performing a proper flush, replaced thermostat and refilled with original Toyota coolant. The car maintains idle operating when ideal or if being driven at normal speed <80kmph @ low RPMS. As soon as we raise the RPMS and bring the car to 100kmph with RPM of 3+ it starts heating up and the needle moves a little over half way. If the speed is reduced at this point, as the RPM drops the needle comes down to halfway. If the car is stopped and left to idle for a 2 minutes the needle gets back to its standard position which is a little below half way mark. The problem occurs with or without AC.

Thermostat is original Toyota rated 82C, Car has been driven throughout on synthetic motor oil. Plugs were recently replaced with standard NGKs. Fan is also working fine. Since it heats up only at high speeds and not while idling in trafic we have ruled out the possibility of a bad fan. We checked the timing and it is within specified range and there is no pinging/knocking. Radiator is original Toyota which came with this model in is great condition. Water level does not decline.

Kindly advise!

This sounds a case of bad crank pulley - its actually a damper and when the engine rpm are rising its slowing down the water pump flow because the pulley is vibrating (acts like a loose belt). the old user capsat made a thread about this. He had get the pulley from Dubai as there were no new ones in Pakistan.

[Xulfiqar]

Because of.the carbon buildup. Are you saying there is no need to open up the throttle body as these mechanics here recommend ?

Is it mentioned in the service procedure?? NO.. The throttle is made as such that it will sufficiently work in its service life without hassle. And to further answer you - dms has explained the correct procedure to elongate engine life.

3s guys ask me on every check up to clean thraatle baady but I bade them to touch it and they grade me as neem hakim parha likha mistri who is shortening his car's engine life by nt cleaning thrtle bdy.

PS I think ocassnl motorway n highway drive coupled with casual adrenaline rush high rev local drive ll keep the carbn deposits away, no?
I might b rong

Sent from my HTC One V using Tapatalk 2

as the user a s memon said - they deem it important because it makes them an easy Rs 2000/- they force it because older cars with carburettors were a money bank for them, the newer cars which have long life systems dont visit them often so they squeeze you for everything.

The only time you need to inspect or service it is when your idle control goes to hell in the old style cable operated ones - It is mandatory to lubricate the idle motor with oil too otherwise that will wear out in very very very short time.

[tyrone_40]

Is it mentioned in the service procedure?? NO.. The throttle is made as such that it will sufficiently work in its service life without hassle. And to further answer you - dms has explained the correct procedure to elongate engine life.

as the user a s memon said - they deem it important because it makes them an easy Rs 2000/- they force it because older cars with carburettors were a money bank for them, the newer cars which have long life systems dont visit them often so they squeeze you for everything.

The only time you need to inspect or service it is when your idle control goes to hell in the old style cable operated ones - It is mandatory to lubricate the idle motor with oil too otherwise that will wear out in very very very short time.

Thanks @xulfiqar now i know not to waste my 1500 Rs on pointless services that they guys insist on.

[rizkhan2010]

@xulfiqar bhai what does 2007 Toyota Vitz's warning light P67-Z mean ??
Car apparently is running fit and fine... but i am curious as to why the above warning light comes on sometimes.

kindly respond.
thanx.

[fahadwizz]

This sounds a case of bad crank pulley - its actually a damper and when the engine rpm are rising its slowing down the water pump flow because the pulley is vibrating (acts like a loose belt). the old user capsat made a thread about this. He had get the pulley from Dubai as there were no new ones in Pakistan.

So lets start with replacing the belt?

[Xulfiqar]

yes - and its best to look for that pulley too, dont buy a used one.

[AmeerUsman]

@xulfiqar
I just bought a mini paj 660 Non Turbo model 1998 manual gear. It is simple Rear wheel drive (NO 4x4).
On high speeds, when clutch is pressed to change gears, there is some chhan chhan sound like if some thing is loose inside gear. When clutch is depressed, the sound finishes. So, wanted to know what could be the possible probelm, and how to solve it.
Further, I want to know whether I should change gear box or ask my mechanic to repair it. There is no problem in shifting of gears. Only noise is the issue.
Waiting for ur valuable suggestions.
Thanx in advance
Regards

[Xulfiqar]

change out the transmission oil and fill correctly. Do not use GL5 oil in it.

[AmeerUsman]

change out the transmission oil and fill correctly. Do not use GL5 oil in it.

Is there some bearing inside which may cause this type of sound?