Engine Miss on acceleration

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Post by Rattly on Wed Apr 05, 2017 5:48 pm

My 1.6 petrol has a flat spot mid range under full acceleration, the dealers, say it's normal, I have had lots of Suzukis from Swift Sport to S Coss diesels I have never felt a flat spot like this it feels like it's run out of fuel , then picks up again, the dealer said he has updated ecr software, haven't tried it yet. Has anyone else had this issue?
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Post by Alrewas on Wed Apr 05, 2017 7:38 pm

Last month whilst accelerating on to the A38 my 1.6 seemed to hesitate then picked up again, I was going to a hospital appointment and arriving at the hospital car park it was obvious that the car had a slight miss. When I left the hospital I drove to my local dealer which is on my way home. The fault was diagnosed within 2 minutes as a faulty ignition coil on number 1 cylinder. The coil was changed and I was on my way within 10 minutes. I asked the technician if this was a common problem and he said he had never changed a coil on a Suzuki before. Not sure if this helps but it may be an intermittent coil fault causing the flat spot.

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Post by Rattly on Wed Apr 05, 2017 8:19 pm

Thanks, I'll pester the dealer again!
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Post by alec on Thu Apr 06, 2017 8:04 am

Not noticed it on mine.
After reading your post yesterday evening I did purposely try accelerating harder than I normally do on my commute home and then to work this morning but nothing.
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Post by Rattly on Thu Apr 06, 2017 8:54 am

OK, thanks
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Post by Admin on Thu Apr 06, 2017 9:20 am

This may be a total long shot but where do you buy your fuel? Supermarket or Garage?
On my motorcycle forum we had a spate of miss fires and it generally pointed to Sainsbury and Asda Supermarkets fuel being used
I have a local garage that everytime i filled up my old Suzuki GV1600 I got a check engine light so I no longer use that garage

With a near empty tank try a tank of Super Unleaded from a shell/esso/BP etc garage , like i said I may be a million miles away but worked on the vanvan motorcycles

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Post by Rattly on Thu Apr 06, 2017 9:21 am

Sainsburys!.....I need to refuel Ill try another station, many thanks!
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Post by Admin on Thu Apr 06, 2017 9:49 am

Fingers crossed it is a simple fix as it was on the vanvan?


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Post by Rattly on Thu Apr 06, 2017 9:50 am

I agree!
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Post by Gar Green on Thu Apr 06, 2017 11:07 am

On my RS416 Swift Sport, I would only use Vpower, anyother fuel would give me a miss.
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Post by Rattly on Thu Apr 06, 2017 11:09 am

Yes, I used that in my Sport as well, didn't think of it with this Vitara!
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Post by Admin on Thu Apr 06, 2017 11:54 am

I work with classic cars and we had a customer who was a retired BP fuels technician, he said you would not believe the condition of super market fuels as well as the lack of maintenence the tanks on site did not get compared to a dedicated fuel only stationĀ 

The Vitara 1600 is basically a detuned swift sport engine so like it's cousin perhaps the vitara likes a higher RON fuel once in a while?

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Post by Rattly on Thu Apr 06, 2017 12:17 pm

Thanks Karl, I think you are spot on!

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Post by Admin on Thu Apr 06, 2017 12:29 pm

Bit of a contradiction to the above but Tesco Supermarket (not Tesco Express) Super unleaded is 99RON instead of 97RON and on a small capacity 125cc engine made a huge improvement in both performance and economy

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Post by Rattly on Thu Apr 06, 2017 12:55 pm

Noted.

Cheers

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Post by graham04 on Thu Apr 06, 2017 6:37 pm

As a matter of interest, Tesco's fuel is supplied by Esso , Azda and Morrisons by Murco. I call in these refineries and find their tankers filling up there. A local independent garage might have an unmarked tanker arrive with cheap bulk fuel, supplied by a specialist broker. Refined almost anywhere in the world for some unknown market.
The most common problem with miss-fires and modern engines are the coils. Unlike older cars they sit in a very hot environment and even the most reliable cars can have these fail at anytime. If this problem continues the dealer must investigate further, do not get brushed off with excuses.

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Post by Rattly on Thu Apr 06, 2017 7:44 pm

Thanks Graham!
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