miss fire?
#1
miss fire?
ive noticed on my wrx when i plant my foot down sometimes the engine judders , it feels like its misfiring, whats causing this? could it be ignition leads?
#2
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what year is it? if its an older wrx and uses coilpacks then it could be that these are beginning to break down, usually resulting in a slight missfire higher up the rev range. Quite common.
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sorry to use your thread but I am experiencing a similar problem with my MY99 impreza. boost is normally around 17 PSI and when I plant my foot I get a slight juddder like a misfire but no knock registered on the knocklink.
This evening the boost was cut to 7 PSI which I assume is limp home mode but no ECU light has come on. Shouldn't be a fuel problem as I only use optimax or tesco 99. Is the coil situation where I should start as it is going for a service in the next three weeks plus MOT on Wednesday this week.
Any advice much appreciated,
thanks
Richard
This evening the boost was cut to 7 PSI which I assume is limp home mode but no ECU light has come on. Shouldn't be a fuel problem as I only use optimax or tesco 99. Is the coil situation where I should start as it is going for a service in the next three weeks plus MOT on Wednesday this week.
Any advice much appreciated,
thanks
Richard
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Originally Posted by roguck
sorry to use your thread but I am experiencing a similar problem with my MY99 impreza. boost is normally around 17 PSI and when I plant my foot I get a slight juddder like a misfire but no knock registered on the knocklink.
This evening the boost was cut to 7 PSI which I assume is limp home mode but no ECU light has come on. Shouldn't be a fuel problem as I only use optimax or tesco 99. Is the coil situation where I should start as it is going for a service in the next three weeks plus MOT on Wednesday this week.
Any advice much appreciated,
thanks
Richard
This evening the boost was cut to 7 PSI which I assume is limp home mode but no ECU light has come on. Shouldn't be a fuel problem as I only use optimax or tesco 99. Is the coil situation where I should start as it is going for a service in the next three weeks plus MOT on Wednesday this week.
Any advice much appreciated,
thanks
Richard
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Originally Posted by woolz
ive noticed on my wrx when i plant my foot down sometimes the engine judders , it feels like its misfiring, whats causing this? could it be ignition leads?
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when the accelerator is pressed it initially feels like a judder but there is no knock indicated. On the way home this evening I was enjoying the car!!! and the boost came on and only went up to 7 PSI so there is no cut it appears to have gone into limp home mode but there is no engine light on the dash which is strange. The boost still goes upto 7 PSI in each gear but the idle is steady with no fluctuation up and down, just steady around 750 rpm so I don't suspect the MAF plus the engine stalls as sson as the MAF is disconnected. Usualy get some knock if the MAF goes and the engine is quiet in that sense. Engine sounds fine the actuator rod does not appear to be disconnected. Still no check engine light beyond the normal illumination on startup.
May see if the car is happier tomorrow morning.
Where would I get a coil and how much should this be the case?
May see if the car is happier tomorrow morning.
Where would I get a coil and how much should this be the case?
Last edited by roguck; 16 January 2006 at 07:35 PM.
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