Hello All,

I am new to this board, and was reccomended it by a friend!

I was wondering if any-one could shine some light on this?:

My pride and joy JDM94 WRX Sti has a slight "misfire" well thats what i'd call it, basically it seems to have started after all this wet weather we have had, it started to splutter about a week or so again in a trip in the rain, but when she warmed up it seemed fine.

A few days ago i noticed that if i rev the car slowly at about 2500RPM the engine seems to "judder" not violently but enough to notice it in the car from about 4000RPM+ you don't seem to notice it as much,

At tickover the car is smooth as, under boost again the car seems fine, if driving in 5th in low RPM i can just about feel it hesitating every now and then. (Its hard to tell due to the stiff suspension) but cruising at about 70 is very smooth..

Someone told me that the damp could of caused a plug to short and blow and "transistor"? does this sound right?

The plugs look a right @rse to try and change..so its either i give it a bash or take it to Power Engineering and fork out a fortune.

Has any-one else had this kind of prob in the past?

Any ideas?

 

Mine does this too. MY95 RA. It doesn't do it on boost, so it's not normally a problem

 

Hello mate,

Has yours been doing it for long?...

 

Possibly could be a coil pack... Im having the same trouble at the minute. Got a coil pack so now just the task of finding out which one is the dodgy one !!


Danny

 

I think it might be the coil packs. I *believe* you can get replacement standard parts or uprated Bosch ones which give a stronger spark? Could be bolox though.

... oh and welcome to the board

 

Surely worth replacing both Dan?

 

I had this same problem - It has just be diagnosed at Power Engineering as one of the coils beging cracked - to fix it is a replacemnt coil at around £50

Hope this helps

 

Hello All,
Thanks for the replies, i think i will try and change the plugs this weekend and see if it makes any differance..

Adam555 do you mind me asking how much P.E charged for the diagnosis etc?...did they change the part for you?

Dave