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Old 14th December 2007, 12:39   #1
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Default fuel.... doubt

hi friends,
last week i faced a problem with my pulsar 150. the bike was stalling when i gave a full throttle and would not take speed above 50km. so i took my bike to the service center and they said it was the problem with the fuel i was using. i was using Indian oil Extra premium petrol for both my bike and my car. they told me that a lot of vehicles are coming in with the same problem and they all turn out to be using the same fuel. they said this fuel causes a king of algae formation. so i had to clean my bikes fuel tank and the carb..

my doubt is, will the fuel cause the same thing in my car.. will the injector get damaged by the fuel..
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Old 14th December 2007, 14:33   #2
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Never heard anything about an issue of 'algae' formation with the usage of Xtra premium. I was using it on my bike regularly and it runs fine. Residue (varnish) formation happens with any petrol if stored for long periods of time.

In your case some debris must've got into the mainjet and caused fuel starvation. Even water could cause such a problem if present in the tank or the carb float bowl.

Btw which pump do u fill the fuel from?
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Old 14th December 2007, 14:49   #3
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algae formation may be the way they refer to a thick waxy residual layer.
since they would both feel the same.

a year after using xtra premium on my bike, its performance started going down. would suffer from sudden drop in speed and then catch up. was very irritating to say the least.

a couple of tankfulls of ordinary IO petrol and the bike healed herself and feels much better now.
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Old 14th December 2007, 14:53   #4
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Default Similar issue


Long time back we had Shankaranand write about a similar issue with his Indigo
http://www.team-bhp.com/forum/street...trip-ooty.html (Scary experience in Indigo on the trip to Ooty)

The problem lies in the fuel quality. This issue is more likely to happen when you put a high performance fuel (speed, superpremium etc) after continues usage of normal fuel. I am not expert here, but the normal fuel leaves a lot of residue and when suddenly you change over to high performance fuel, the residue gets cleaned and enters the system and clogs it. Its no algae or anything like that.

If you want to use high performance oil, stick on to that. One more important factor is to find out good petrol pumps in your area and to avoid experimenting. We have a thread on good pumps also here in T-BHp.

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Old 14th December 2007, 16:22   #5
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Check out for Water in ur fuel tank as well as carburettor.
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Old 14th December 2007, 16:29   #6
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I know in future we may use algae to produce fuel.
In that way you should get the advantage.
Tell this problem to service guy.
I can say any thing specfic by hearing the problem
I don't see any advantage of you using Indian oil Extra premium petrol here
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Old 14th December 2007, 18:17   #7
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Just one questions to the experts....while taking delivery of my Unicorn Sport, mechanic at the dealers place told me to use normal unleaded petrol rather than Speed/ or any other so called High Performance one....

Also when I used Speed for once, the performance dropped and there was black smoke from the exhaust upon acceleration.

There after I am using normal unleaded fuel and not having any problems.

Can anyone has idea about the reason for this?

Mod - This might be little off topic but as this thread is about the performance of Pulsar with HP Fuel, I am posting this reply.
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Old 14th December 2007, 18:22   #8
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How old is the bike ? Probably it was just due to some dirt in your Tank which should be fine now since the tank & carb are cleaned
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Old 14th December 2007, 18:33   #9
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I have been using xtra premium on my bike and car and I have felt a gain in perf and FE.

I had face the same issue once when I had got my bikes carb cleaned, the bike would run smooth and the moment I opened throttle it would stall.

The reason was that while fitting the carb back the mech had left the choke in the (full) on position. When I closed the choke the problem seemed to have resolved.

Secondly, if you notice that while riding the bike when u whack the throttle open the bike first dies and then lurches ahead, it is a clear indicator of
1. Carb not tuned
2. Dirt/Water in petrol
3. Air block, in the aeroplane type fuel lid bikes.

Please check all of these and see if this resolved your problem. Pulsar's in particular have a lot of these "air block" issues, all youdo is open the lid and put it back. Problem solved.

Hope this helps.
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Old 14th December 2007, 19:26   #10
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Originally Posted by Technocrat View Post
How old is the bike ? Probably it was just due to some dirt in your Tank which should be fine now since the tank & carb are cleaned
Its a P150 DTSi just about 1.5 years old!
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Old 14th December 2007, 19:47   #11
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It can happen only if you have used normal fuel for a longer period and then switch to premium fuel. In such cases all the deposits which have been formed with time comes to engine and carburettor thus causing the problem.
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