MK2 Cupra V-power vs Tesco 99

[Mark300zx]

If you change fuels regularly the ecu takes time to adapt to the new fuel octane, I should imagine it takes a few tanks of fuel for it to adapt to the correct settings, maybe why you are getting black smoke out of the back?

 

[COBBERS]

I will not be putting Tesco 99 in my Cupra again.
My Cupra is a phase 2 running near 360ish(getting dyno tomorrow).
When Tesco in the tank the car makes far more smoke under full load, to the point where is very noticeable out the back window... Black smoke means the car is running too rich or not burning the fuel properly.

Put v-power back in and now there's only a tiny haze of smoke under full load.

Read up on Tesco fuel, its mixed with ethanol to get to 99.
Ethanol makes the fuel more dry which does not burn as well in a road engine.

http://WWW.thorneymotorsport.co.uk/t...s_Update.shtml

...Interesting read!

 

[n0ble]

Agree with you, the ecu does need to adapt to the fuel. However, I did try resetting my ecu by disconnecting the battery and I had about 45 litres of fuel to burn through and it didn't get any better.

I think vpower was 98 Ron at that point?

Also that link does not seem to work for me, but a quick google finds a cached version.

 

[mrbubba]

That link gives a 404 page not found

Sent from my GT-P7510 using Tapatalk

 

[Claki]

Very good. That has just changed my mind to what fuel i will be using. Ive always used V-power, but always felt that tesco 99 has had an edge on it and that report just proved it.

 

[jc_boc]

Very good. That has just changed my mind to what fuel i will be using. Ive always used V-power, but always felt that tesco 99 has had an edge on it and that report just proved it.

Got a better link for that report as I get the same error and can't find it.

 

[Geordie_Paul]

http://www.thorneymotorsport.co.uk/tuning/Fuel_Test_Results_Update.shtml

I think that is it?

 

[jc_boc]

Thanks mate, working now.

 

[robdf2]

I have never found any difference between tesco or shell , mpg about the same performance about the same, idling the same really all the same lol