what fuel additive to use

robnye

I have a common problem in my Vauxhall Zafira, which is that the engine cuts out when decelerating, ie when moving of highway onto slip road or slowing down for roundabouts, then the engine wont restart for a couple of minutes.

i have taken it to garage, but no codes have shown up when run through the diagnostic tests, no lights are showing on the instrument panel either.

someone tried cleaning something out for me... which lasted about 2 weeks,

someone has suggested trying a fuel additive into the petrol tank, but they couldnt remember what to suggest. i know there is hype about using supermarket petrol (90% of the time we buy from supermarket), but when we have bought from non supermarket petrol, we still have the same issue

as anyone done this?
what was it you added?

Markyt

I had similar symptoms (different car though) when there was an air leak in the fuel system - a pump seal had gone, in my case, and it only did it when the engine was cold and under load, so testing at garages didn't show anything up.

robnye

originally i thought it was due to weather, but it happens anytime of the year/day/weather... there just doesnt seem to be any consistency to when it happens - some trips, it doesnt happen, others several times within a short period of time (depending on road/roundabouts/sliproads etc)

sherrymatthews

It seems it is quite common problem with Zafira. One of my friend had same problem. he tried all the ways.. later part exchanged it for a VW... suggest to try vauxhall forum

robnye

ive looked there - most have changed egr valve or idle control valve, but still have the problem...... also seems to be a common problem with the type of engine in other recently modern cars

just thought i might try the additive to cut out the possibility of it being the fuel

TiTheRev

The trouble with supermarket fuels is that is doesnt have the extra additives that help clean the engine and give you the extra MPG etc. There's a good chance you've coke'd up the throttle body or injectors which would have been cleaned by 'normal' garage fuels. The additive may be able to clean this out, but it will only happen again if you continue to use the cheaper fuels. It's been recommended by Auto manufacturers and watchdogs etc, to use one tank normal and one tank supermarket fuel if you want to make a saving without messing up your car.

robnye

thats what i thought, any suggestions on what additive to use?

TiTheRev

Redex, STP, Wynns, Wurth...most will do a similar job, but make sure you get the petrol/diesel version as applicable

hewhoisnotintheknow

asda sell redex for £3something a bottle, i shuv it through every 5000 miles which is once a month !

robnye

hewhoisnotintheknow wrote: »

asda sell redex for £3something a bottle, i shuv it through every 5000 miles which is once a month !

do you buy your petrol from asda as well?

do you do this because of an issue you had, or cos it was recommended?

hewhoisnotintheknow

robnye wrote: »

do you buy your petrol from asda as well?

do you do this because of an issue you had, or cos it was recommended?

I buy all my diesel at one shell station, NEVER asda

I just shove it through as i rely on my peugeot so much and its never let me down!