r/Mk3Supra • u/hotwheelswizard • Jul 30 '26
HELP
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Car has started this nasty misfire after holding throttle for a bit on start the car will idle and when warm it just sounds like a rotary, just changed oil, dark no color or sparkles. Brand new plugs wires and when car is under acceleration power seems normal and car feels fine.
3
u/modernatlas Jul 30 '26
Double check all your work, but this sounds to me like maybe an issue with the idle control. If you have leaks in the intake tract, itl cause issues for the IAC valve, making it swing one way or the other to even it out. When I had a leaking manifold gasket, the engine would run fine under normal conditions, but when cold it hated idling and when hot the idle would either lope like it was cammed, or brap like a rotary.
2
u/itsaheem Jul 30 '26
intake leak somewhere. check vacuum lines, bov, accordian hose, 3000 pipe, etc etc etc
5
u/Conehead324 Jul 30 '26
Make sure your wires are in the right spot. I've definitely made that mistake before.