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y does it hesitate when warmed up

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Old 09 March 2008, 06:23 AM
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jami3-wrx
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Default y does it hesitate when warmed up

im havin a problem with my 94 wrx saloon,
when it warms up it has a really bad missfire and loss of power!
tried connecting test plugs for error codes but got nothing!
if left for a day goes great for 20 mins then goes cr*p after that!
ive replaced the plugs, cleaned boost solonoid and tried a 2nd hand maf


has a z4 ecu, blitz bov and stainless cat back exhaust

any help please
thanx
Old 09 March 2008, 11:10 AM
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jami3-wrx
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anybody??
Old 09 March 2008, 11:23 AM
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Jolly Green Monster
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coil packs most likely, they break down inside and are worse when hot

Simon
Old 09 March 2008, 11:33 AM
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ozzreid1964
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had same problem replaced coil packs happy days
better off doing all 4 at the same time sometimes you ca'nt see a crack after i took mine off one looked perfect put a screwdriver in the end and a little bit of pressure on the side and there was just a hair line crack in it
Old 09 March 2008, 12:31 PM
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jami3-wrx
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thanx for the help guys
Old 09 March 2008, 04:31 PM
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JamesVTS
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im having this issue on my newage wrk, cyl 4 misfire, sorted a new coil pack, will see what happens lol
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