miss fire
12 August 2007, 06:32 PM
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miss fire
hi can anyone tell me what things can cause a miss fire apart from the plugs and coil packs?had them both changed and car still missing when turbo kicks in,any ideas plz???
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13 August 2007, 12:19 PM
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thx for that mark, the fuel filter was changed about 6-7 months ago, is there anyway i can find out if its the fueling without the need to change the pump, worst would be putting a new pump in and then finding out its not that?other then the fueling is ther anything else i can check or change?ive already changed the maf,crank, and cam sensors
13 August 2007, 12:27 PM
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As I say, I'm no expert, but if it runs OK at low speed and only misses under load, then this would suggest timing or fuel. (?) There must be a techie on here somewhere...
Don't know how you test a fuel pump either.
Don't know how you test a fuel pump either.
13 August 2007, 03:20 PM
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I had a misfire / split second cut out on boost. Subaru put it down as a faulty wastegate solonoid and replaced it but the fault remained - so it could be worth checking that...
It transpired that naive me was told my scoob was standard, however a bleed valve type affair was turned too much causing overboost and subsequent split second cut...
Just my own experiences, you never know, they may be of use
It transpired that naive me was told my scoob was standard, however a bleed valve type affair was turned too much causing overboost and subsequent split second cut...
Just my own experiences, you never know, they may be of use
13 August 2007, 05:18 PM
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The correct way to spell is "misfire" and not "miss fire" . . A lot of illiteracy on this forum!
. . .You see . .If you spell it in the latter form , people will assume that you are referring to a female by the name of FIRE . .
. . .Thank you for reading . . .
. . .You see . .If you spell it in the latter form , people will assume that you are referring to a female by the name of FIRE . .. . .Thank you for reading . . .
13 August 2007, 11:12 PM
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cheers for all the opinions guys, ill probably start off with the fuel pump and take it from there if its not fixed, by the way how do u mean by '"sticky valve?" what is that and can it be fixed??
13 August 2007, 11:30 PM
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in what way can it be timing mark?i thought that is all controlled by the ecu?ive tried 3 different ecu's and no luck, is there anyway to alter the timing, and just to let you guys know that ecu has been reset and checked for fault codes but nothing shows. 
14 August 2007, 12:16 AM
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get your wallet out time !!! let someone with experience have a look.....sure there must be some scoobynet guru near you !
14 August 2007, 12:30 AM
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i got it booked at zen, bit of a wait though but guess your rite, just wanted to get it sorted as its soo annoying as i cant really go past 45000 revs, but will try out a new pump and maybe injectors if i can get hold of them at a good price, by the way rab do u know what a "sticky valve" is can can it be sorted?
14 August 2007, 12:36 PM
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thx for that rab, will try the pump and let you guys know how it goes, fingers crossed, if not then ill have to wait and see what zen say, thx guys for your opinions and helping me out. 
14 August 2007, 06:02 PM
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i would seriously clean out the boost solenoid inside the drivers wing firsly....pump should be good....try this....can of brake/carb cleaner and clean out all hoses to actuator etc and then drive to check....
21 August 2007, 10:47 PM
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hi rab sorry for the late reply, well i got a new pump in today, the car seems to run much better and dont think its missing but havnt tested it fully, but there seems to be another prob for some reason, its not boosting fully,not getting more then 0.5bar in any gear,any ideas to why or what it can be? any help will be appreciated.
zaf
zaf
22 August 2007, 02:09 AM
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hi how is your scooby running now and if you're looking for cheap parts try your local scrap yard or atuo brakers (sum parts can be ok i use them all the time & save a load of money sum new part are just to dear)
22 August 2007, 04:01 PM
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My brother's WRX was doing exactly the same. He replaced the boost solenoid and it cured the problem
22 August 2007, 04:07 PM
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thx for ur reply moley, will try it out 2day and c how it goes, can it also come down to a sensor or anything else if not the boost solenoid? i dont have any error codes coming up. just boosting at 0.5, and revs to about 5000 but holds ther