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Re: Weird Miss??
my 5.0 had similar probs after all the usual stuff replaced with
no codes and like your 5.7 was CFI until I had the injectors
replaced with MFI. It runs perfectly now but at the cost of $700
for parts & installing. The dealer has equipment to clean the CFI,
but I hear this can only be a temporary fix for these poppit injectors.
I had already cleaned my MAF & EGR & of course fuel filter first thing
like jshort said and after I had the fuel pressure tested. Most folks
will target the distributor for a miss for a bunch of good reasons
but I think usually a misfire code is involved. If its just an idle prob,
most will say to check EGR system or coolant temp sensor. There are
methods for checking these but assuming you have no codes stored,
I would bet your injectors need to be professionally cleaned. GOOD LUCK
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03 WRX
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