2E Rough Idling

[James Baviera]

good evening! i have a an issue on my 1990 Toyota Corolla EE90 with a 2E engine.

rough idling, i changed all of my vacuum hoses, PCV hoses (even installed a DIY Oil Catch can using a fuel filter), cleane d the carb, and adjusted the air/fuel mixture and idle speed pero di talaga ma-stabilize yung idle, na overhaul na yung carb last april plus change oil and tune-up.

yung idling nya parang may sinok..

kanina pauwi ako sobrang unstable yung idling nya lalo na pag naka stop or nakabukas yung engine yung tipong mag-stall na hanggang sa mamatay pero maiistart naman uli. pag naka on ang aircon lalong bumabagsak ang idling, chineck ko yung idle up device umaandar naman pag naka on yung aircon pero bumabagsak pa din yung idle


need help po, thanks!

[James Baviera]

makaka tulong din po ba kung palinis ko yung fuel tank and lines ko? di pa ata kasi nagagalaw yun

[dr. d]

makaka tulong din po ba kung palinis ko yung fuel tank and lines ko? di pa ata kasi nagagalaw yun

things starting going bad after you changed a few things. so, it must be one of those things you did...
if you did not touch the fuel tank, then most likely it's not the tank.

oil catch? hindi ba may direction yon? baka baliktad...

btw, i hope you did not use any gasketmaker paste... it wreaks havoc on the jets..

poor idling? but ok when running at speed? sounds like fuel starvation of the idling circuit.

[James Baviera]

things starting going bad after you changed a few things. so, it must be one of those things you did...
if you did not touch the fuel tank, then most likely it's not the tank.

oil catch? hindi ba may direction yon? baka baliktad...

btw, i hope you did not use any gasketmaker paste... it wreaks havoc on the jets..

poor idling? but ok when running at speed? sounds like fuel starvation of the idling circuit.

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

i used a fuel filter and followed the directions of the arrow (yung arrow going to the engine)

yes i used silicon gasket paste (kasi malaki yung diameter ng lumen ng hose compara dun sa hose attachment ng oil catch can)



fuel starvation?paano po yun?

[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!

[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?

[[archie]]

Spark plugs?

[shelu]

baka electrical ang problema sir? have you tried checking the distributor?

[James Baviera]

bagong palit na dizzy ko, from contact point type to electronic

[vinj]

Spark plug wires ever been changed? If you change them, use Toyota OEM or NGK brands if possible. You may also want to clean the fuel tank as well.

[James Baviera]

salamat sa replies, any ideas kung magkano magpalinis ng fuel tank?how do they do this anyways?pati ba fuel lilinisin din?