2005 WRX hesitation/flat spot
Discussion
Hi all,
My 2005 WRX has an intermittent spot of hesitation when accelerating in 4th & 5th gear whether on part or full throttle, it boosts very well in 1st, 2nd & 3rd. The car has a stage 1 remap done by Andy Forrest (by a previous owner) and associated intake and exhaust mods to suit the map. I fitted an up-rated Walbro fuel pump thinking that would cure the issue but it hasn't.
Any advice appreciated.
My 2005 WRX has an intermittent spot of hesitation when accelerating in 4th & 5th gear whether on part or full throttle, it boosts very well in 1st, 2nd & 3rd. The car has a stage 1 remap done by Andy Forrest (by a previous owner) and associated intake and exhaust mods to suit the map. I fitted an up-rated Walbro fuel pump thinking that would cure the issue but it hasn't.
Any advice appreciated.
Could be overboosting, then running a bit too lean and sensing some Knock/DET. As a result it will pull some timing hence the hesitation. Could be fuelling going too rich even. Might just be your MAF sensor playing up. Really need to pug in and take it for a drive to see what's going on.
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