sometimes jerky on full throttle

[Ade]

Got my t5 back today, first Rica mapped run with all boost pipes intact!

Thing is it tends to shudder/jerk/hold back slightly when on full throttle sometimes.... Any idea what this may be?

[T5frankie]

spark plugs

[t5 pete]

put new spark plugs in alot of people have this ones having a remap

[Ade]

Cool, a quick check of one looked ok, but prob worth doing them if that's common. :D

[t5 pete]

They always do look ok but for some reason the remap deffinatly picks out the weak plugs

[Volvostorm]

These are cheap:

http://cgi.ebay.co.uk/GENUINE-Volvo-Spark-Plugs-TURBO-850-V70-S70-C70-S60-T5-/290500103099?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item43a327cbbb

[thunderace]

Got my t5 back today, first Rica mapped run with all boost pipes intact!

Thing is it tends to shudder/jerk/hold back slightly when on full throttle sometimes.... Any idea what this may be?

Mine did the same at about 3500rpm, changed leads and plugs and problem fixed.

[96T5Andy]

These are cheap:

http://cgi.ebay.co.uk/GENUINE-Volvo-Spark-Plugs-TURBO-850-V70-S70-C70-S60-T5-/290500103099?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item43a327cbbb

I also bought some sparkplugs from that same seller. very happy with the item.

[woz]

same thing with mine, - try different petrol - TEsco 99 throbonator seems better in my car than Shell Veep.
Yet Shell Foolsave is better than any other vomit fuel when needs must.

Even with the best option I still get occasional shudder under full boost like a sort of cough or hiccup.

Had similar troubles to yours which bacame almost chronic - had two garages look at it - in the end someone on here suggested plug leads so i replaced those and "poof" problem solved - back to the normal mild hiccups anyway.

So - if you have changed the plugs and tested different petrols, try the leads and dizzy cap then get your injectors cleaned by Jimathon, you should notice a good improvement at least.

Cheers

Woz
Oh and let us all know what the solution is;>)

[Ade]

Plugs ordered.... fingers crossed!

[merc85]

I'd try some new leads as mine was suffering the same symptoms, new leads cured this although mine is not remaped. :(

[chunky]

im having same problem,does anyone use ngk iridium plugs? if not what do you reccomend? cheers :)

[p fandango]

im having same problem,does anyone use ngk iridium plugs? if not what do you reccomend? cheers :)
most just stick with genuine Volvo ones

[The Flying Moose]

I use NGK Platinums, I have found they last the longest and I have never had any issues. The bosch super plus plugs seem good too.

As pedro says however you can pick up a set of genuine for £25.