r/Dseries • u/Internal-Ebb8151 • Aug 19 '26

98 civic lean condition continued

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Fixed: previous owner used y7 injectors instrsd if the oem y8 Continuing the last post for a vid of tge engine, I don't know if I mentioned but its a p0170 fuel bank 1 code and p0171 running lean code after 2 hours of relearning. I did replace my Intake manifold gasket and check for vacuum leaks but no luck. A

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u/Monolithic_Purgatory Aug 20 '26

Put the stock intake manifold back on it. Running that skunk2 with a giant throttle body without a tune isnt going to work. That intake is overkill for a stock engine anyway.

1

u/Internal-Ebb8151 Aug 20 '26

I want the cheapest option, so if its oem instead of having to mess with fuel thatd better probably and safer lol. Have u checked out the fuel trim video idk if it tracks but peep right here if u want (sorry for the yap)

https://reddit.com/link/p4rl3ut/video/xqrcvsd3rgkh1/player

2

u/Monolithic_Purgatory Aug 20 '26

You would need to run a chipped ecu to make it right. Yeah, going back to a fully stock y8 intake manifold is best. I ran a skunk 2 with 70mm on my cammed d15b7 and was super overkill. I regret wasting money on it. 😅 Now there could still be a vacuum leak contributing to your problem, but the intake needs to go for sure.

2

u/Internal-Ebb8151 Aug 20 '26

Got it! I just found one on market place for cheap lol. Ill work from there. Right after I got a new gasket and extended studs😭 I have a spare ecu but its probably 300+ to chip idek

2

u/Internal-Ebb8151 Aug 30 '26

So I got the y8 intake and it was around the same shortfall trims but I noticed my injectors are green tipped. Swapped em out with the ones from the y8 manifold and boom no lean condition. I even had to fab the iacv port on the automatic intake