juddering on boost, what next?
#1
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juddering on boost, what next?
hey again guys,
i have a 1995 sti redtop
its failed the mot on emissions so ive bought new spark plugs which i have now fitted and a new lambda sensor which i have yet to fit, may have to replace the CAT too.
my biggest problem though is that its running either very rough on boost or just cutting the power altogether when i floor it and it just then judders violently until i lift off, which i have to do almost immediately coz its so bad. its just had a service but its been doing this for a while now, really annoying me. any ideas?
ps: i am very new to scoobies so try and keep answers simple for me ta, lol
i have a 1995 sti redtop
its failed the mot on emissions so ive bought new spark plugs which i have now fitted and a new lambda sensor which i have yet to fit, may have to replace the CAT too.
my biggest problem though is that its running either very rough on boost or just cutting the power altogether when i floor it and it just then judders violently until i lift off, which i have to do almost immediately coz its so bad. its just had a service but its been doing this for a while now, really annoying me. any ideas?
ps: i am very new to scoobies so try and keep answers simple for me ta, lol
#3
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the only mods as far as i know are just hks mushroom filter and turbosmart dump valve. only had the car 6 months and havent modded myself.
#4
hey again guys,
i have a 1995 sti redtop
its failed the mot on emissions so ive bought new spark plugs which i have now fitted and a new lambda sensor which i have yet to fit, may have to replace the CAT too.
my biggest problem though is that its running either very rough on boost or just cutting the power altogether when i floor it and it just then judders violently until i lift off, which i have to do almost immediately coz its so bad. its just had a service but its been doing this for a while now, really annoying me. any ideas?
ps: i am very new to scoobies so try and keep answers simple for me ta, lol
i have a 1995 sti redtop
its failed the mot on emissions so ive bought new spark plugs which i have now fitted and a new lambda sensor which i have yet to fit, may have to replace the CAT too.
my biggest problem though is that its running either very rough on boost or just cutting the power altogether when i floor it and it just then judders violently until i lift off, which i have to do almost immediately coz its so bad. its just had a service but its been doing this for a while now, really annoying me. any ideas?
ps: i am very new to scoobies so try and keep answers simple for me ta, lol
coil packs would be my first choice to check, were they last checked when the spark plugs were changed? (rubber boots on the end pulled off to inspect?) as even the slightest of a hair line crack and a little bit of damp weather can cause the problem you are experiencing.
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agree with the above... try swapping back to the original recirc valve rather than the dump valve. Or check (or have someone check) the dumpvalve is adjusted correctly before you go spending out on un-necessary stuff. If its got a diagnostic function (check engine light) then check the fault codes by connecting the plugs under the dash and reading the 'flashes' of the light. The info is in technical archive i'm sure
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