Ask Xulfiqar - An Automotive Encyclopedia

[umair.haroon.9256]

And long run me engine bhi weak karega mehran ka ac. .

Long run ke liye mehran use ker ke trip kon berbaad kere ga kamazkam aasra to ho acha wala yehi chahte hain!
Itne log mehran ke ac se khush hain bhai!

Sent from my iPhone using PW Forums

[umair.haroon.9256]

Mehran ka yahi rona hai sab ka. If you are full time ac driver (which everyone is, in summers) then Id suggest you ke itna kharcha nahi krro mehran per bech ker mira ya jdm alto lelo their ac's are way better than mehran's though they lack in pick than mehran.

Doosri gariyan bhi hai per normal routine keh liye best hai is liye ac ka keh raha hoon. Yar ac installed hai! Garbar kahin aur hai

Sent from my iPhone using PW Forums

[aliraza100000]

Long run ke liye mehran use ker ke trip kon berbaad kere ga kamazkam aasra to ho acha wala yehi chahte hain!
Itne log mehran ke ac se khush hain bhai!

Sent from my iPhone using PW Forums

Hmmmm oh phir theek hai mene kaafi perha tha k mehran ka ac acha nahi kaam kerta tou I had this in my mind. Best of luck for resolving your issue

[wasim625]

Lolx
Mehran key AC se zda na he expect kia jaye to bahtar hai. I had a 2014 mehran bought it brand new. Uska AC b bs guzara tha door windows pe or pechey dikki ke sheshey pe black shades wagera lga kar bhi bs guzara he hota tha.

[wasim625]

@xulfiqar
Bhai what do you think of mechanics slightly oiling the belts to reduce that certain noise - not the squeal sound exactly but that other kind of noise.

[afnan.bashir]

check throttle working, check TPS signal pattern.

Well opened the MAP, was clogged with dirt. Cleaned and issue is resolved. Next tested the TPS.Pattern seems to be jerkless but was at base 0.0 with full throttle closed. WOT was 4.2.

Re adjusted it for 0.5 closed and 4.5 WOT. But gear shifting has changed third gear engages near 3k RPM. Anyway i am into new problem.

While reseting the ECU i unplugged the negative terminal and then after sometime placed it back on forgetting car was at Ignition. Now shifting lever wont come out of park i have to override it by inserting key

[margallar]

i think i never said that i m going to put ONLY DISTILLED WATER in my radiator...this point did cross my mind to make it clear for the audience before any confusion, but nevertheless left it to ur judgement. Anyways, i always use anti-rust/anti-freeze in my car

i forgot the chemistry behind it. but pure distilled water is more corrosive than tap water. it won't work without coolant

[Shoaibm]

Well opened the MAP, was clogged with dirt. Cleaned and issue is resolved. Next tested the TPS.Pattern seems to be jerkless but was at base 0.0 with full throttle closed. WOT was 4.2.

Re adjusted it for 0.5 closed and 4.5 WOT. But gear shifting has changed third gear engages near 3k RPM. Anyway i am into new problem.

While reseting the ECU i unplugged the negative terminal and then after sometime placed it back on forgetting car was at Ignition. Now shifting lever wont come out of park i have to override it by inserting key

I may be wrong but i don't think shift interlock is linked with ECU. Are you sure your ignition is switched on and brake pedal is pressed?

[afnan.bashir]

I may be wrong but i don't think shift interlock is linked with ECU. Are you sure your ignition is switched on and brake pedal is pressed?

Yes I am sure. Now i have to test brake switch but this should not happen. I dont have HDS so cant do PCM learn procedure. Will try once i get home from work. Traditional PCM learn procedure includes bringing the car at optimum temp then let it idle for 5 mins.

[Shoaibm]

If brake lights are on with pedal pressed then your pedal switch should be ok. Your idle learn procedure is right except don't include the fan running time in 5min :). But I don't think idle learn will fix this issue.

[searchingeyez]

Well opened the MAP, was clogged with dirt. Cleaned and issue is resolved. Next tested the TPS.Pattern seems to be jerkless but was at base 0.0 with full throttle closed. WOT was 4.2.

Re adjusted it for 0.5 closed and 4.5 WOT. But gear shifting has changed third gear engages near 3k RPM. Anyway i am into new problem.

While reseting the ECU i unplugged the negative terminal and then after sometime placed it back on forgetting car was at Ignition. Now shifting lever wont come out of park i have to override it by inserting key

afnan how did you clean the map sensor i heard that irs very sensitive and should not clean .

[afnan.bashir]

afnan how did you clean the map sensor i heard that irs very sensitive and should not clean .

Well my MAP is has a bigger hole. I applied De-Greaser and then washed with water. I could see inside sensor shiny grey. I never tried to clean it by inserting something or use petrol or stuff

[searchingeyez]

Well my MAP is has a bigger hole. I applied De-Greaser and then washed with water. I could see inside sensor shiny grey. I never tried to clean it by inserting something or use petrol or stuff

my car's map sensor has small tip .can i use carb cleaner (bought yesterday frm metro sasta aur payedar ). aik to itni mushkil chezen hain cars ki agr maintain karne pe ajao.. aur aik humara desi ustaad hai jo hur cheez petrol se dho deta hai condensor ko b ni bakhshta petrol se

[afnan.bashir]

If brake lights are on with pedal pressed then your pedal switch should be ok. Your idle learn procedure is right except don't include the fan running time in 5min :). But I don't think idle learn will fix this issue.

Following means that it is quite possible to happen. I will test brake switch and then do following.
Well there was on internet I have an article from a Honda service bulletin below .

A/T Stuck in Park AfterThrottle Body Replacement

NOTE: This article applies to A/T-equipped '03-05

Accords, '02-04 CR-Vs, and '03-04 Elements

Has this happened to you? You've replaced the

throttle body, now you start the engine, but the

A/T won't shift out of Park.

If this situation strikes an all-too-familiar chord, it

could be that the PCM needs to learn the relative

throttle position. This is a learned value, just like

idle learn. To make this happen, here's what

you do:

1. Connect the HDS with version 1.012.023 or

later software to the 16P DLC.

2. With the engine turned off, check the TPS

sensor voltage and the relative throttle

position. The TPS sensor voltage should read

0.49 volt; the relative throttle position should

read 0%.

• If both the TPS sensor voltage and the

throttle position are OK, then continue with

normal troubleshooting.

• If the TPS sensor voltage doesn't read 0.49

volt, go to step 3.

• If the relative throttle position doesn't read

0%, go to step 4.

3. TPS sensor voltage greater than 0.49 volt:

Check the adjustment of the cruise control and

throttle cables. If the cables are properly

adjusted, then replace the throttle body,

and retest.

TPS sensor voltage less than 0.49 volt: Replace

the throttle body, and retest.

4. Reset the PCM with the HDS, then do the idle

learn procedure.

Read more: http://www.justanswer.com/honda/3uao3-05-accord-ex-coupe-2-4-sulev-spd-auto-replaced-tps.html#ixzz3ZR6GyDOM

[afnan.bashir]

my car's map sensor has small tip .can i use carb cleaner (bought yesterday frm metro sasta aur payedar ). aik to itni mushkil chezen hain cars ki agr maintain karne pe ajao.. aur aik humara desi ustaad hai jo hur cheez petrol se dho deta hai condensor ko b ni bakhshta petrol se

hahaha well yes you are rite. Well why do you want to clean it what problems do you have? if you wana do it i would suggest do it gently. Dont use carb cleaner. At this place only dist can get clogged inside you can use a thin tooth pick with cotton at its ends. Wipe it in circular motion. Dont tap it hard but jerk so that every thing that has losen off comes out. I suggest if you dont have any problems leave it. Cleaning aint gona make much difference. I was having a hiccup so i did it

[searchingeyez]

hahaha well yes you are rite. Well why do you want to clean it what problems do you have? if you wana do it i would suggest do it gently. Dont use carb cleaner. At this place only dist can get clogged inside you can use a thin tooth pick with cotton at its ends. Wipe it in circular motion. Dont tap it hard but jerk so that every thing that has losen off comes out. I suggest if you dont have any problems leave it. Cleaning aint gona make much difference. I was having a hiccup so i did it

i have fuel consumption but when on idle unburn fuel smell can be feel higher as compared to other cars. i didnt see black smoke but still fuel consumpion is higher and attaching picture of exhaust tail

[afnan.bashir]

i have fuel consumption but when on idle unburn fuel smell can be feel higher as compared to other cars. i didnt see black smoke but still fuel consumpion is higher and attaching picture of exhaust tail

As per exhaust tip your car aint running rich. If i were you i would go in following direction

1. Fuel Pressure at Idle and WOT
2. See Short Term Fuel Trim levels\
3. Make sure my car is in closed loop once it reaches a temp
4. Fans are not direct
   5 Thermostat Valve is in place
5. My ELM is doomed but ill buy one and see what happens to MAP readings at idle do they change. or surge things like that

[searchingeyez]

As per exhaust tip your car aint running rich. If i were you i would go in following direction

1. Fuel Pressure at Idle and WOT
2. See Short Term Fuel Trim levels\
3. Make sure my car is in closed loop once it reaches a temp
4. Fans are not direct
5 Thermostat Valve is in place
6. My ELM is doomed but ill buy one and see what happens to MAP readings at idle do they change. or surge things like that

i have t stat installed
fan are auto
car does not jerk at even higher rpms it goes to 7k without any hestitation.
car doea not have o2 se sor so fuel trim is not possible in this car
i once scanned through the scanner i red the map air pressure about 33kpa which is accordi g to the specs

[afnan.bashir]

If brake lights are on with pedal pressed then your pedal switch should be ok. Your idle learn procedure is right except don't include the fan running time in 5min :). But I don't think idle learn will fix this issue.

@xulfiqar

Well after learn procedure it was still the same. Observation is Car would not let me un park if TPS is above 0.39 volts. Below that i can un park the car.

Setting it to 0.49 makes gear shifting go bad as well as i cant shift from P to D

[saeedmagsi]

Dear @xulfiqar bhai. Today i noticed the temperature went up til 101 degrees in an outside temperature of about 48 degrees in sibi. The AC was on and the ac fan speed was at full. Is it normal for toyota se saloon or it is higher? Please reply. I was thinking the fan to be faulty or slow. But i dont know how to check the fan. Or it is just fine i dont need to worry about.