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Old 27th July 2009, 01:08   #1
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Default Sputtering Toyota Corolla

i ve got a corolla with a stage 2 cam and emanage ultimate.
tanked up at the sion 24 hr pump,the car started splutering at about 4.5k rpm on flyovers and once of a flat road . it happens for a second or so jerks violently 3-4 times.
this is the first time its happened , i blame bad fuel but could it be something else and the refueling was just a co-incidence?
The car behaving wierdly on climbing flyovers made me a bit paranoid.
No errors shown on the emanage.

What could it be ?
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Old 27th July 2009, 01:49   #2
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Clogged injectors? Bad fuel? Impending problems with fuel pump?

Offtopic, what brand cams, springs and retainers are you using?

Last edited by pranavt : 27th July 2009 at 01:50.
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Old 27th July 2009, 02:20   #3
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crower cams.springs and retainers were from monkey wrench racing .
its been 60k kms could it be the fuel pump?
injectors cleaned 20k back.
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Old 27th July 2009, 02:55   #4
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Could be bad fuel.

Else you might need a new fuel pump.
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Old 27th July 2009, 04:10   #5
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Hi Paras, i guess i know which fuel pump you are talking about , stop tanking up there. Its definitely adulterated fuel pls replace your fuel filter ASAP and clean your spark plugs and injectors to avoid further damage to the fuel pump.
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Old 27th July 2009, 07:03   #6
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Get your fuel filter changed first, then start using any premium petrol only. It is not adultrated and will also keep your injectors clean. I used premium fuels in my Matiz for 7-8 years without any problem and that kept the car's engine trouble free.
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Old 27th July 2009, 07:30   #7
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how come premium fuel is not adulterated but normal is? Wouldnt the resellers make more profit by adulterating the premium brand given its higher price?
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Old 27th July 2009, 08:46   #8
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Quote:
Originally Posted by Takumi-san View Post
how come premium fuel is not adulterated but normal is? Wouldnt the resellers make more profit by adulterating the premium brand given its higher price?
Quite simple. Regular fuel moves faster than Speed/Power which means a faster return on 'investment'.

Many car owners prefer standard fuel nowadays because of the iffy benefits provided by premium fuels and lower price. I prefer premium while others in my family prefer standard for the reason mentioned above.

There is of course the bogey of premium fuel affecting the fuel pump which it does under specific conditions.

Rgds,
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Old 27th July 2009, 08:51   #9
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Quote:
Originally Posted by paras211 View Post
i ve got a corolla with a stage 2 cam and emanage ultimate.
tanked up at the sion 24 hr pump,the car started splutering at about 4.5k rpm on flyovers and once of a flat road . it happens for a second or so jerks violently 3-4 times.
this is the first time its happened , i blame bad fuel but could it be something else and the refueling was just a co-incidence?
The car behaving wierdly on climbing flyovers made me a bit paranoid.
No errors shown on the emanage.

What could it be ?
This is what I think in order of probability:
a) Clogged fuel filter
b) Fouled spark plug(s)
c) Fuel pump fault

A fuel pump replacement will set you back quite a bit. Fortunately most faults can be repaired.

Rgds,
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Old 27th July 2009, 13:14   #10
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Quote:
Originally Posted by Takumi-san View Post
how come premium fuel is not adulterated but normal is?
It's a myth that premium fuels aren't adulterated. Ask me, I found out the hard way. The chances of pilferation may be slightly lower, but the practice is just as abundant as in the regular range of fuels.
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Old 28th July 2009, 01:45   #11
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Took the car to Toyota for a window stuck mid way.Toyota guys felt nothing wrong with the fuel,fuel pump ,fuel filter. They cleant my throtle body. Car is running fine now, pushed it to 200kph not a hiccup any where.

OT-My rear window wasnt working. Toyota says new motor needed Rs 8000+
also front one is become weak could conk off too. Any cheaper option?
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Old 28th July 2009, 10:07   #12
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1. why do you use premium fuel when normal fuel is all that is required (Toyota recommends normal and normal fuel in metros is as per Toyota's recommendations). Advice to avoid spending Rs. 2+ extra on `premium' fuel.
2. sure that adulterated fuel problem can be avoided in a metro like Mumbai.
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Old 28th July 2009, 11:47   #13
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Quote:
Originally Posted by GTO View Post
It's a myth that premium fuels aren't adulterated. Ask me, I found out the hard way. The chances of pilferation may be slightly lower, but the practice is just as abundant as in the regular range of fuels.
+1 to this. Was using Xtra Premium for a month or so for the Santro and the engine seemed to be pinging at even the slightest depression of the accelerator. Switched to normal Shell unleaded at my next fill and the transformation in terms of engine smoothness was profound. Have never filled premium fuels at any of the PSUs since this.
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Old 28th July 2009, 14:48   #14
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Quote:
Originally Posted by GTO View Post
It's a myth that premium fuels aren't adulterated. Ask me, I found out the hard way. The chances of pilferation may be slightly lower, but the practice is just as abundant as in the regular range of fuels.
GTO : Please post your findings regarding adulteration/premium fuels !
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Old 28th July 2009, 15:37   #15
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Mithun,

OT: But there was an article in one of the leading English newspapers a few weeks ago on the truth about these so called "premium fuels". I think it must have appeard in TOI.
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