Fuel pressure & ecu / AFM matchup
Posted 18 August 2017 - 7:23 PM
Looking for some advice for my 92RS as its hunting for idle after the throttle is let off, it evens out and runs okay after about 5 seconds though.
I know the previous owner played with the fuel pressure regulator, I have a gauge, what should I be setting the pressure to at idle / what's the ideal pressure to run?
Its got yellow injectors, K7 ECU, green afm
I'm wanting to install a wideband and gauge at some point, the exhaust / turbo got really hot when I drove it so I'm assuming its running lean
Any advice much appreciated 😁
92 BC Legacy RS
Posted 18 August 2017 - 10:22 PM
As for the hunting idle, most common is vacuum leaks. Check and replace any brittle lines that show any signs of cracking, make sure they're secured properly with hose clips or heavy duty cable ties (not shitty cheap ones!), common areas are the intake pipe that connects to turbo and the intercooler charge pipe
Other common issues with idle hunting could be coil packs - does it boost alright? IF it's splutters and misses on boost it'll be coil packs
Idle control valve, this is tricky to diagnose, check ecu codes to make sure it's not something else, it should move freely when removed, if not you can clean it out and get it moving nicely again it may work, or replace it with a known good one.
Posted 19 August 2017 - 1:24 AM
Currently got the shifter out so can't really test it, turns out the hot smell / smoke was grease over the headers where a CV boot must have split and not cleaned properly after its replacement 😁
92 BC Legacy RS
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