Weird issue of stalling

searchingeyez (searchingeyez) 2014-09-02 12:41:29 +0500 #14

crank pulley change hui thi

argtr65 (argtr65) 2014-09-03 04:41:54 +0500 #15

Crank shaft pulley(Harmonic Balancer) or crank pulley on which timing belt is installed?

afnan.bashir (afnan.bashir) 2014-09-03 04:50:22 +0500 #16

Did he worked on Timing belt? or replaced it? or just crank pulley was changed. Just to make sure things are fine at mechanical level consider following

Bring the cylinder 1 to TDC. Remove timing Cover top and see the cam pulley and make sure the marks of both cam and crank are as follow.

if i am not wrong following open part is idle control for your car. Make sure it is not clogged.

Once that done remove the grip of IACV, adjust the car RPM to 500 and then turn off the car. Plug the electrical connector back and reset the ecu by removing the negative battery terminal for 10 minutes.

Start the car and let it stay for some 3-5 minutes without any electrical load and let it adjust its idle itself..

report with results and ill further guide you

searchingeyez (searchingeyez) 2014-09-03 12:57:26 +0500 #17

afnan really thanks for your concern ... i changed crank pulley and mechanic put the pulley which is differ in design with original crankshaft pulley i said to put the same pulley but mechanic said it is all right to use this pulley (i was sad coz due to differ in diameter i would not able to set ignition timming or tdc by rotating pulley )

Second :
diameter of crankshaft pulley is also different .. i tested it while setting timming mark UP at top, mark of tdc on new crankshaft pulley was some degree before the nib at timing cover compartment

i hope u have understood and third on your behalf i unplug iacv harness idle went to 1500 and while iacv plugged in rpm is at 800 ?? is there any problem with idle screw?
i will appreciate your answer with all of my questions

searchingeyez (searchingeyez) 2014-09-03 12:58:24 +0500 #18

crankshaft pulley

afnan.bashir (afnan.bashir) 2014-09-03 17:43:12 +0500 #19

Changing the diameter of Crank Pulley you are altering the ratio. So your mechanical timming is bad, it could be a disaster for engine so get it sorted immediately and install OEM Part.

When you pull the IACV Grip adjust the RPM to 500 then reset ECU then plug back ECU will automatically adjust RPM. If not then set them to required. But first change the pulley

Dont trust mechanics on these common physics things. If someone says bahi you have A Negative Blood group, but wo mil nahi raha , Bakre ka blood charha deta hoon Blood he ha wo be so it will not work.........

searchingeyez (searchingeyez) 2014-09-03 18:04:28 +0500 #20

but ....... new pulley to camshaft se tdc set ker k install hui na ...piston aur head ki timming to theek hi hui bas timing mark different honge new pulley pe coz diameter is different ...disadvantage yeh hoga k timing light se adjust ni ho sakegi ignition timing ... ratio kharab hogi to compressor , power steering pump,alternator ki hogi cam shaft ki to ni hogi ...albta maine scanner se ignition set karwai ahi 16 degree pe ......what u say

afnan.bashir (afnan.bashir) 2014-09-04 02:50:46 +0500 #21

No understand the physics, see lets suppose that for every one round for crank pulley your cam moved about 2 cycles, with the increase in diameter of crank pulley this ration would change and for every one round of crank pulley your cam would now move more than 2 cycles say 2.5.

Even if you adjust the timing by distributor or by teeth you have altered the ratios which will eventually effect the timing of opening valves for intake and exhaust.............

Question: Was the mechanic a methamatian ? did he calculated how far should be the TDC Mark from notch for change in diameter of new pulley? definately answer is going to be NO. So install OEM Part.

Ya to milta na ho kahin se be........... ab milta ha to phir koi aur lagana ziate gare se

searchingeyez (searchingeyez) 2014-09-04 15:09:43 +0500 #22

searchingeyez;4515008:

afnan really thanks for your concern ... i changed crank pulley and mechanic put the pulley which is differ in design with original crankshaft pulley i said to put the same pulley but mechanic said it is all right to use this pulley (i was sad coz due to differ in diameter i would not able to set ignition timming or tdc by rotating pulley )

Second :
diameter of crankshaft pulley is also different .. i tested it while setting timming mark UP at top, mark of tdc on new crankshaft pulley was some degree before the nib at timing cover compartment

i hope u have understood and third on your behalf i unplug iacv harness idle went to 1500 and while iacv plugged in rpm is at 800 ?? is there any problem with idle screw?
i will appreciate your answer with all of my questions

afnan i unplugged the iacv turned the idle air bypass screw rotate closewise till the end but rpm was at 1200 not at 500

btw i have broken my tps wiring

searchingeyez (searchingeyez) 2014-09-04 15:14:28 +0500 #23

afnan crankshaft pulley is not connected to cam shaft ..pulley is connected to steering pump , ac and alternator ...infact cam gear is connecting to another pulley in timing belt compartment which moves with the crankshaft.... i also attached the picture of cam shaft and pulleys related to cam

let me know ur opinion

argtr65 (argtr65) 2014-09-05 05:19:47 +0500 #24

Change in diameter of crank shaft pulley will not affect on engine timing, but it can affect on alternator,power steering pump,water pump and A/c performance.

argtr65 (argtr65) 2014-09-05 05:28:19 +0500 #25

First of all correct the tps wiring,then remove distributor cap and clean the assembly including rotor and inspect the distributor cap for worn out.If the problem remain persist then clean crank senor and check its coupler for proper connection and slightly retard the ignition timing.

afnan.bashir (afnan.bashir) 2014-09-05 08:02:05 +0500 #26

@searchingeyez Sorry i dont thing what i was imagining while having that thought. You are correct. and @argtr65 pointed out correct. It would not effect engine timing as it is linked with timing belt.

Work out your TPS wiring. Most liveky it would solve your problem.
Reset the ECU
If does not work out then above setting technique.

searchingeyez (searchingeyez) 2014-09-05 17:22:42 +0500 #27

@afnan.bashir now.plz.guide me when i unplug rpm stuxk at 1500 then i rotate the idle.screw till the end but rpm went to 1200 not at 600 is there some air vaccum leakage? Guide me

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afnan.bashir (afnan.bashir) 2014-09-06 17:45:49 +0500 #28

I Suspect a Vacuum Leak.......

Watch Youtube Videos for How to find Vacuum Leak. If you are in Lahore you may visit me or @syncview........

If you have Vacuum Leak then un accounted air enters the System causing change in Air to Fuel Ratio

syncview (Osama Abbas) 2014-09-06 18:01:00 +0500 #29

I don't understand the reason behind changing the crankshaft pulley with a non oem one?

searchingeyez (searchingeyez) 2014-09-06 18:13:53 +0500 #30

i watched the video to spray carb cleaner i will definatey go for it very soon

searchingeyez (searchingeyez) 2014-09-06 18:15:30 +0500 #31

bro mechanic intstalled this for 2000 ... if its working fine then dont want to spend money on that for now ... it will change all setting of ignition and other parameters

syncview (Osama Abbas) 2014-09-06 19:40:38 +0500 #32

going back to oem pulley won't affect the ignition timing at all

but again, why was the pulley changed?

Xulfiqar (Xulfiqar) 2014-09-06 20:04:54 +0500 #33

I believe you are confusing the belt drive pulley with the timing pulley, if the lower timing pulley was wrong size - the engine would never fire due to extremely bad timing.

If you have changed the belt drive pulley with another design part then make sure its actually meant for your engine - the pulley aka harmonic damper is actually a shock absorber for the crankshaft vibrations (4 cyl engines are not smooth)