Wat r the things included in car tuning?

[cowboy_779]

wat r the things included in car tuning other than oil change etc and after how much time a car needs tuning.

my second question is that the cars with carburettors (like khyber,cultus etc )is it important to open their carburettors during the tuning.is it benificial???is it able to adjust after wards .????is the any other way of doing rather than opening the carburettor..plz comment

[waqarJSE]

MOST OF THE MECHANICS WHILE TUNING OPEN CLEAN AND ADJUST CARBURATOR BUT IT IS NOT ONLY UNNECESSARY BUT ALSO IT IS DANGEROURSE FOR CAR

[robin]

generic question

1. Plugs: cleaning/changing/setting gap
2. distributor point: cleaning/changing (not for CDI)
3. air filter: cleaning/change
4. tappet adjustment/ setting intake, exhaust valve gap (if engine getting overheated (tight) or having trouble in starting (loose))
5. spark timing adjustment
6. battery fluid level check

For carburetor, i don't think it requires tuning very often, for those who are afraid of its sevicing, i'd say it depends on quality of workmanship which we know

[FLi_GTi]

Waqar, i would like you to elaborate that statement please.

"MOST OF THE MECHANICS WHILE TUNING OPEN CLEAN AND ADJUST CARBURATOR BUT IT IS NOT ONLY UNNECESSARY BUT ALSO IT IS DANGEROURSE FOR CAR"

[FLi_GTi]

For service intervals and specifications, always refer to your owner's manual. If you do not have the owner's manual OR service history and have recently purchased a second hand vehicle and are unsure as to how to proceed. The following should be of some assistance.
Assuming that you spent your money wisely and thoroughly inspected the car of damage and wear and tear, the following are the approx intervals followed by almost all manufacturers for small passenger vehicles. (Gasoline)
1. Engine Oil & Oil FIlter -Every 5000kms or Three months (whichever comes first)
2.Sparkplugs - (have a life span of 15,000Kms approx)
3.Every 10,000 kms Get an engine tune (Lash/rocker arm type OHV engines only require valve clearance/lash adjustment) Most vehicles like the Corolla & Cultus are fitted with hydraulic bucket tappets and they and are usually the self adjusting type. Always follow OE recommeded clearences and never go +/-.050mm over recommneded clearance. If your valves rap/or lossen before that, you've got faulty valve pins. Its a good idea to have your carburettor cleaned with every tune. Just because someone doesn't know how to do it, dosen't mean its not recommended. Prolonged negligence will see your fuel intake go up due to blocked ancilliaried and buildup aroun the needle valve. (thats another reason, Engineering graduates are held in greater esteem than the Polytechnic diploma holders).
4.Every 10.000kms, get your brakes cleaned and readjusted. That includes your E-brake too. Do not forget to include the rear drum/discs to save moeny. At the service, replace your airfilter as well.
5. Your fuel filter gets the dump at 20,000
5. Change all fluids and lubricants at40,000kms. They are gearbox oil, brake oil,Coolant, powersteering oil and so on. Contrary to what people tell you, these oils are not there for a life time. Don't tisk it.
7. Timing and V-Belts go at 80,000kms if the vehicle is excessivly used for offroad, dusty excursions and 100,000 if used in an Urban environment.

Remember, ALWAYS REPLACE used o-rings and gaskets with new ones. Older ones should never be reused. If your vehicle overheats, replace engine oil as soon as possible while getting the problem rectified.

[Alcapone]

nice suggestions Fli; just wanted to add few things. keeping in mind the quality of fuel n oil we get here....just to be on the safe side i wud say..
1) Engine Oil & Oil FIlter -Every 3000 kms
2) Spark Plugs every 10,000 kms

and a Q's as well..

wat if the Jets of the carb get blocked...i have tried carb cleaners, caltex cx3, hi octane but na...nothing works...the car just losses power after hitting 4 on RPM...Mechanics recon a carb replacement...can anything else be done?

[shahabrk]

yaar try using a spray called carburator cleaner its very good for fuel injection cars since i used it ans saw the results my self u have to spray it from airintake it really clears the air intake and if u can find buy of acdelso if u can find other wise go for usa made they r better than malaysian and other local or u can also use a saudi made its very good also

[Alcapone]

tried it...lots of them n im dealing here with a carb, anything else?

[FLi_GTi]

Alcapone, if you'd please tell me the make of your car, maybe i'd be able to help you out better. But the problem you're describing is consitent with malfunctioning secondaries and vaccum leaks.
To avoid speculation, kindly pen down your vehicle make.

[Alcapone]

its corolla 86, reconditioned 94. mechanics recon that it has a TTC (donno know wat the hell is that) engine and so the carb is not the ordinary one.

[FLi_GTi]

TTC carburettors usually have secondaries and other funtions operated by vacum hence the plaethora of piping. Jets by themselves don't get blocked, you're probably running a carburettor with messed up vaccum hosing and in need of a desperate overhaul. I do believe that people opt to change the aforementioned carburettor with the Aisin units with mechanical secondaries.

[sali2002]

hello!
mostly they in tuning they just open plug ,mess up with idle adjusting nut some rotations of Air fuel mixture....for cars having point contact...point was checked...
i think following things should be done if car goes to tune up...

Engine oil,break oil and Coolant checkup....change oil if necessary....

Plugs cleanup and adjusting timing with Timing Torch.....

Adjusting Valve Clearence,Adjusting Idle RPM with RPM meter..Adjusting A/F Mixture......

Checking out Pulley Belts and replace them if necessary....Timing Belt should be checked out after 60,000km..

if these things are done properly so no doubt that you can run your car like new after 1,00,000km and so on and ppl can't find you standing in front of your car doing something in engine room :)...
Thanxxx

[Alcapone]

Thanks Fli,
the problem is that the car runs beautifully on CNG, its just the petrol it goes sluggish. it hits 150kms and goes in red zone in first three gears. i have tried everything, like plugs changed, air/fuel filter changed...please advise!

[FLi_GTi]

@Alcapone
Sorry, Did'nt get that. Could you clearify?

[Alcapone]

please follow the forum trail, as mentioned before, the car is behaving abnormally on petrol after 4000 RPM (losses power, starts missing) but its sweet on CNG i.e missing or loss of power after 4000 RPM.

[Alcapone]

correction....NO missing n loss of power:) sorry for inconvenience!

[FLi_GTi]

They're a couple of reasons.
Make sure your vaccum hosing is correct.
Check if secondaries working under load.
Stuck accelerator pump.
Clogged fuel filter.
Inspect PCV valve.
Check valve clearances (you're probably running excessive)
You probably may be looking for carb overhaul but get the vehicle tuned on fuel and see how things are.
If the Vehicle is equipped with EGR mechanism check cat and inspect for exhaust restriction.

[Alcapone]

Thanks Fli, these are the things which these desi mechanics are not aware off. pls let me know where i can go? (islamabad)

[FLi_GTi]

Go to Toyota Rawal, Ask for Mr Sultan or Nayyer Abbass(technician), Tell em Adeel sent you.

[Murtaza]

i agree with Robin he has told the right things
Now robin i just wanted to ask u some thin
i hav coure 2004 (cx eco )last time i got it tuned up on 40,000 km , all fluids were changed including gear oil,eng oil ,brake oil,coolant,
but this time i used ordinary air filter
and now my car is missing at shift points therefore i had to change the gears a bit earlier also bcoz the topspeed of my car has also fallen used to run upto 135 km on cng , and now it hardly goes upto 110km,
so i want to ask is it just coz of the air filter or due to the gear oil .
Also my engine is soundind a bit more at shift points...
waitin 4 ur reply