5 have been fighting a mis for some time now. i feel as though I have checked everything i could besides my ECU.
I have replaced the fuel filter, had injectors flow tested, new fuel pump, checked for spark, swapped coil packs, changed plugs and wires twice yet the car still wont accelerate and sounds like a WRX.
The problem is that the car idles pretty well and cruises well once you get up to speed, however getting up to speed is the problem. Under any amount of acceleration the car hesitates, stutters and goes lean. As soon as i let off the throttle the car goes rich quickly then settles back to normal levels. If i have the car cruising it seems fine AFR wise, but just sounds like a WRX and has 0 power.
So i finally pulled the ECU today in hopes to finally figure out my issue. Attached are the pictures of what the board looks like. I'm not very sure of what i should be looking for to tell if its bad or even know how to test it if there is even a way to do so. The board on the top looks normal but the bottom of the board have a small amount of what appears to be rust.
Please take a look and give your input on the ECU or what else might be causing my issues.
15G's/Custom Dual Intakes/IPS FMIC/HKS SSQV/ATR Downpipe/ATR Single Shot/RC 5%0cc Injectors/Hotwired Denso Supra Pump/SX AFPR/SX High Flow Fuel Filter/EK2 Fuel Rail Loop/Vac Reduction/3sx EGR Plates/3SX Plenum Spacer/MSD Wires/NGK R5671A-9/Maft-Pro/HKS EVC-S/AEM Wideband. Boost, Oil Pressue, Water Temp Gauges/Tein S-Tech
im having same problem... my alternator just died and my battery is dead too. ive heard alternater was culprit if its on its way out.. got one from ebay... hope it works like it did for other people... changed coils. wires. maf. rebuilt both turbos.. pressure washed oil buildup from bad turbo seals in plumbing and flushed intercoolers... pplugged up inter coolers from oil might have same effect. and have a ptu comin from ebay as well... when i turn crank angle sensor, i notice the backfire moves with timing
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