Tope

[DeltaBravo]

medyo naguguluhan ako kung ano ang symptom ng isang engine na may tope.
ano ba ang symptom ng maguumpisa pa lang magkatope ang engine?

kahit ba naka idle lang ang engine na may tope eh madidistinguish na ba? or kailan tumatakbo or naka high rpm?

thanks

[Ungas]

Kailangan may engine load, shift prematurely around 1800-2000 rpm. Then you will here engine clicking sound.

[Mardim]

I had that problem before even without shifting prematurely. But when i changed gas stations nawala sya. Depends on the quality of gas sometimes. Or a very old engine(aka taxi).

[DeltaBravo]

thanks ungas, may dagdag pa ako...

automatic ung sasakyan. from idle, lagay ko sa drive, then accelerate hard (up to 3000-3500rpm). while the car is still gaining speed *3000rpm may naririnig akong sound like "tik tik tik". once na umabot na sa 60-70kph ang takbo nawawala na ung tunog.

pero kung slow drive lang ako, ung hindi bigla ang tapak sa gasolina kahit umabot na sa 3500rpm ko ay wala ung tunog.

in short nagkakaroon lang ng tik tik sound kapag umarangkada ako ng todo (0-80kph in 8 seconds).

ung fuel ko ay caltex gold.


tope ba or normal lang? ano ang gagalawin/check ko kung papunta na sa tope?

[Ungas]

It's not about the brands of gasoline used, your engine must have been using the incorrect octane rating. Just follow what the manual's required octane rating.

Subukan nyo po muna sa ibang octane, alam ko kasi pag carburador pwede timplahin sa timing. Di ko lang po sigurado sa EFI engines.

[DeltaBravo]

noted ungas. pero 95 RON na ang vortex gold. yun nga ang mahirap sa efi eh, puro sensor ang nagtratrabaho. tnx.

[Ungas]

Baka naman po mawawala if you switch to a lower octane rating? like Vortex Silver?

[DeltaBravo]

balak ko nga kaso i'm afraid something might went wrong sa engine. nakuha ko kc ung car na Vortex Gold na ang gamit and ever since un na ang fuel. okey lang kaya magswitch ng lower fuel octane?

[Mardim]

what i meant is the quality of gas from the specific gas station. I dunno but sometimes pag nagkakarga ako sa di masyadong magandang station( i.e. luma) parang may halong iba yung fuel. Vortex gold din yung kinakarga ko. (sorry to butt in BTW)

[DeltaBravo]

ur welcome mardim. same din ba ang problem mo before? 2 caltex station lang naman ang kinakargahan ko he he he... Ung Caltex sa Coastal Road ung Caltex malapit sa SM Bacoor.

cguro isolate ko muna sa 2 Caltex stations, then kung ganoon pa din eh downgrade ako sa Silver.

[Ungas]

DeltaBravo::: It's fine to switch to a lower octane and test the result. You can fill it up half tank, to test pag di umubra, full tank ng Vortex Gold.

Mardim::: Yeah, it's difficult to choose which stations to fill up, ingat lang pag binabaha yung area ng gas station or kahit yung kanto nila. Malamang nahahaluan ng tubig kahit papano. :D

[artpogi]

Originally posted by DeltaBravo
kahit ba naka idle lang ang engine na may tope eh madidistinguish na ba? or kailan tumatakbo or naka high rpm?

thanks

I'm not sure, but probably not, unless the engine is in really poor condition.

Ungas, is right that incorrect octane ratings may cause tope, but IMHO fuel quality can also be a factor.

AFAIK, poor ignition system, which includes your spark plug, can also cause tope. Why, becausel tope (or detonation/pinging) is simple poor combustion.

As for the "tik" sound, my best guess is the valve, might need adjustment.

Paki korek na lang po kung mali.

[glenn]

Originally posted by DeltaBravo
thanks ungas, may dagdag pa ako...

automatic ung sasakyan. from idle, lagay ko sa drive, then accelerate hard (up to 3000-3500rpm). while the car is still gaining speed *3000rpm may naririnig akong sound like "tik tik tik". once na umabot na sa 60-70kph ang takbo nawawala na ung tunog.

pero kung slow drive lang ako, ung hindi bigla ang tapak sa gasolina kahit umabot na sa 3500rpm ko ay wala ung tunog.

in short nagkakaroon lang ng tik tik sound kapag umarangkada ako ng todo (0-80kph in 8 seconds).

ung fuel ko ay caltex gold.


tope ba or normal lang? ano ang gagalawin/check ko kung papunta na sa tope?

DeltaBravo,

This is exactly what I experienced! My car is a corolla 93 Gli (requires at least 95 RON- which I didn't know before), let me share the fuel I have tried, RON and the results:

Shell unleaded (93) - I was like you, I'm used to filling up with this fuel pero tope.
Shell premium (93) - tope
Caltex Silver (93) - tope
Caltex Gold (95) - tope
Petron unleaded (93+) - tope from one station but very seldom na ang tope when I tried another station
Petron XCS (95) - kafu full tank ko lang(of course from may favorite petron station) the night before last night so hindi pa ko masyado sigurado, pero parang mas konti ang tope.

I would also like to add, gas stations are supposed to buy from their main plant or something but there are unscrupulous gas stations that buy cheaper fuel from other sources, they call this "pa-ihi", mas mura ang gas, pero mas low quality.

I don't want to post my favorite gas station baka bawal, parang marketing ang dating, if you want I can PM you.

good luck!

[Mardim]

To Delta bravo.

Nangyari sa akin ito nang malala nuong nagpakarga sa caltex sa south harbor malapit sa manila hotel. Nung lumipat ako sa isang bagong caltex station sa malapit sa timog eh nawala kahit paano(i use a 94 xe) siguro sa makina din dahil luma na. pero yung tope nung sa caltex south eh naririnig ko sa loob. sobra yun.

[speedyfix]

if changing fuel and octane ratings doesn't help reduce the tope then bring it to a shop to have the timing checked. advanced or wront timing can cause tope to occur in an engine. if medyo luma na yung car you may also want to think about having the tappets adjusted

[DeltaBravo]

hi huys update ko kayo.

nagtry akong magsimulate kagabi sa macapagal pero wala ung clicking sound.

this morning try ko ulit sa coastal road at macapagal "parang" wala pa din ung clicking sound.

i remember sa caltex coastal ako huling nagpakarda. hindi ko pa din sure kung sa fuel quality ng station ang problema pero try ko pa din kung ma sisimulate ko ung clicking sound sa mga days to come.

Mardim, alam ko ung cnasabing mong station sa south harbor banda. Yan ung station na pinupuntahan ko kapag di na ako aabot sa suking station ko.

Cguro stick na muna ako sa isang station lang.

[Ungas]

Yep, it's better to stick to one station and observe.

[DeltaBravo]

finally found the solution!!!

from vortex gold (RON95), i downgrade my fuel to shell's super premium (RON93). Medyo mas malakas ang pinging sa RON93.

Last night, i decided to try Petron's Blaze (RON96) . One last try before i contact my mechanic. Pakarga ako ng fulltank (fuel tank is near empty na).

From Petron (Macapagal Blvd) to Uniwide Coastal, alalay lang ang takbo. kako ubusin ko muna ung natitirang gasolina na nasa fuel line.

Pagpasok ng coastal (around 11:30pm), binirit ko na. Almost 4000rpm na wala pa din akong marinig na pinging. This morning i tried it again at wala na ung pinging/tope.

I think higher octane rating solved my car's problem. Only drawback is mahal ang Blaze.

Pa tune up ko pa ba or pabayaan ko na sa Blaze? Sa tuneup, ang gagawin daw eh adjust timing at barbula? Paano ba adjust barbula?


Last night,

[1D4LV]

pa try mo na ring i-pa tuneup pards.

[Ungas]

Di na siguro kailangan adjust valve gaps, adjusting the timing will be sufficient enough. Kaso dapat sa 93RON ang gamit mo para ma-set ng tama.