2E Rough Idling

[dr. d]

silicon gasket softens when exposed to gasoline. and gets carried away into the carburetor, where it infiltrates minute fuel passages and clogs them...
i am not sure if those hoses in the picture connect to the carburetor...
but if this is what happened to your engine, then a re-overhaul of your carburator might be in order.
as a rule, i do not use silicon gasket in fuel lines or carburators.

but before you tear into that engine, check the electricals first. baka palpak lang ang kabit ng isang kable..

good luck.

[James Baviera]

silicon gasket softens when exposed to gasoline. and gets carried away into the carburetor, where it infiltrates minute fuel passages and clogs them...
i am not sure if those hoses in the picture connect to the carburetor...
but if this is what happened to your engine, then a re-overhaul of your carburator might be in order.
as a rule, i do not use silicon gasket in fuel lines or carburators.

but before you tear into that engine, check the electricals first. baka palpak lang ang kabit ng isang kable..

good luck.

salamat po, actually yung nilagyan ko ng silicone gasket is yung pcv system, which goes i think directly to the intake manifold, i made sure na di papasok yung silicone gasket paste sa internals, i placed it far away from the hose lumen.


another issue: whenever i turn on the aircon, di ba ang normal reaction ng engine is to increase it's idle form 800 rm to about 900 rpm to compensate for the load of the a/c compressor? anways ganito nangyayari lately, pag bukas ng aircon aakyat saglit then magiging sobrang erratic yung idle tapos the engine would eventually die. This happens not only when the engine is cold but sometimes it happens after a long drive, especially kung titigil ako sa stop light or intersection, i checked to idle up mechanism umaandar naman, sinigad ko na yung screw sa maximum pero i only get at most 900 rpm, i checked the timing ok naman, is there any other things to check? would the idle up actuator be in fault? thanks again! happy new year!

[dr. d]

salamat po, actually yung nilagyan ko ng silicone gasket is yung pcv system, which goes i think directly to the intake manifold, i made sure na di papasok yung silicone gasket paste sa internals, i placed it far away from the hose lumen.


another issue: whenever i turn on the aircon, di ba ang normal reaction ng engine is to increase it's idle form 800 rm to about 900 rpm to compensate for the load of the a/c compressor? anways ganito nangyayari lately, pag bukas ng aircon aakyat saglit then magiging sobrang erratic yung idle tapos the engine would eventually die. This happens not only when the engine is cold but sometimes it happens after a long drive, especially kung titigil ako sa stop light or intersection, i checked to idle up mechanism umaandar naman, sinigad ko na yung screw sa maximum pero i only get at most 900 rpm, i checked the timing ok naman, is there any other things to check? would the idle up actuator be in fault? thanks again! happy new year!

sounds like fuel starvation (of the idling circuit. barado..?

[James Baviera]

nagpalit na ko ng fuel filter kaninang umaga, gumanda menor pero pag naka aircon ganun pa din pa loko loko..

i read stuff about fule starvation pwede din pala dito yung maduming tangke, remember my EE90's fuel tank hasn't been touched for 23 years...

[dr. d]

nagpalit na ko ng fuel filter kaninang umaga, gumanda menor pero pag naka aircon ganun pa din pa loko loko..

i read stuff about fule starvation pwede din pala dito yung maduming tangke, remember my EE90's fuel tank hasn't been touched for 23 years...

yes, but that's what fuel filters are for. did your filter look dirty when you replaced it?

i wish i can just tell you to go borrow another carburator and install it.. but that's a little difficult to do right now..

but i do know that you wouldn't need an entire afternoon to overhaul a carburator... and i read somewhere that the carburadores' shops are along kamuning... but it's actually fun to do it oneself if one isn't in too much a hurry and one doesn't mind a little grease on the elbows and hands..

[James Baviera]

i think i solved the problem with my idle, first i took out all of my sparkplugs and cleaned them using a small steel brush (i bought this SP cleaning kit sa concorde) napansin ko sa SP na rusty colored yung tip neto pero i also noticed oil sa thread, is this normal? second i set my timing right (tancha mode lang), third, inayus ko yung a/f mixture sinagad ko clockwise and then nung naghehesitate na yung makina i slowly turned in counter clockwise, as in slowly talaga pinapakinggan ko yung menor kung titino hanggang sa tumino tumigil na, (i think i made 3 turns counter-clockwise. lastly i sprayed a hell of carb cleaner on my carb, dito ko ngayon napansin na gumanda menor ng sasakyan ko, must it been a dirty carb all along? pre sa a/c di na sya namamatay pero erratic sya at 900 to 1.1k anu kaya eto? gumagana naman yung idle up.



observe ko uli tomorrow pag cold start nya, usually nasa cold start ang problema..

[James Baviera]

yes, but that's what fuel filters are for. did your filter look dirty when you replaced it?

i wish i can just tell you to go borrow another carburator and install it.. but that's a little difficult to do right now..

but i do know that you wouldn't need an entire afternoon to overhaul a carburator... and i read somewhere that the carburadores' shops are along kamuning... but it's actually fun to do it oneself if one isn't in too much a hurry and one doesn't mind a little grease on the elbows and hands..

true! kaya nga pag may time ako gustong gusto ko magkumpune ng makina, usually naman externals lang naman

[Quint]

all i did was replace all the worn out vacuum hoses and pcv hoses (plus installed the oil catch can)

Eto ang suggestion ko sa 'yo.

1. Balikan mo lahat ng vacuum hoses mo. Tingnan mo kung tama ang mga diameter ng pinalit mo na mga hoses. Tingnan mo rin kung ang pagka lapat ng mga hoses kung saan may mga dugtong. Kailangan mo ba i- hose clamp? Baka naman di mo pinalitan ang mga hose clamp. Mahigpit ba lahat?

2. Simulan mong tingan yung vacuum leaks mula sa intake, mula sa air cleaner to MAF to throttle body. Minsan hindi nakikita yung leaks. Subukan mo i-spray ng carb cleaner pa-unti unti sa mga intake side especially lahat ng dugtong ng vacuum hoses. Gawin mo ito habang naka idle ang makina. Caution: gawin mo lang ito kapag malamig ang makina. Huwag pag mainit.

Kaya ko sinasabi na vacuum leak yan kasi sabi mo pag malamig siya hirap. Tandaan mo na ang goma ay nag-e-expand kapag mainit. At kapag nag expand na, nawawala na yung mga leak. Pero kapag malamig, may shrinkage, kaya doon lumalabas yung leak. Yung idle control valve vacuum connections kailangan i-check mo rin kasi sabi mo nga naglalaro yung idle between 900-1100 rpm. Maganda na ring linisin mo yan ng carb cleaner bago mo ibalik.

Ang suggestion ko, ibalik mo na rin yung original timpla / settings i.e. tama na timing, A/F mixture. Medyo marami ka ng ginalaw na tantsa-tantsa lang. Di po recommended yan. Tsamba. Baka lumakas pa ang konsumo.

Yung spark plug, dapat dry. Pag wet, double check mo lang kung gasolina o langis. Amuyin mo yung basang spark plug o ipunas mo. May usok ba yung oto? Kung wala, baka gasolina yan. Unburnt fuel.

Iba pang posibilidad.
1. O2 sensor.
2. Throttle position sensor.
3. Spark plug wires (lalo na doon sa "basa" na spark plug)

[James Baviera]

salamat po sa inyo! i think my idling issue has been solved, the culprit all along was a rotten resonator

i overlooked this before not as soon i noticed smelling exhaust fumes and a unusual noise underneath the front passenger side. after some lengthy research, i found out that a busted exhaust system can contribute to poor idling, high fuel consumption, and noise. after asking many of my friends where to have my car checked they recommended Jomar's Exhaust Systems.


i brought my beloved EE90 to Jomar's and had my old resonator replaced with a new one. The result:

1.) no more rough idling issues!!! yehey!!

2.) better engine response

3.) quieter ride

4.) FC i still have to compute

[1D4LV]

basically, pag rough idling, its the spark plugs.
why not try to change them first?