New engine, misfires

Tyc0 · 12-17-2020, 09:53 PM

For some background I just installed a new engine and moved all the accessories from my old block to the new one. In the process I took my injectors and put them into the block as well. Now I know that every time you take the injectors out your supposed to install new seals, but I took them directly out and into the new engine, each one was out for roughly 20 seconds before they went into the new block. Plugs and coils are brand new. Think I just need new seals ?

B58 · 12-17-2020, 10:01 PM

I would start with those seals first.

Tyc0 · 12-17-2020, 10:05 PM

Quote:

Originally Posted by B58

I would start with those seals first.

Will do, you think I need the metal couplers as well?

Tyc0 · 12-17-2020, 10:35 PM

Ordered seals and couplers, will update when I install on Monday.

Mustafa.e92 · 12-21-2020, 01:36 AM

U gotta code the injectors

Tyc0 · 12-21-2020, 07:23 PM

Quote:

Originally Posted by Mustafa.e92

U gotta code the injectors

The injectors are from the old engine, the only thing changed was the engine itself. But I think the new seals have fixed my problem. I was able to hit 17 psi with no misfires so I believe they are doing their job!

Tyc0 · 12-23-2020, 10:46 PM

The injectors have fixed the problem but now I get a fuel mixture control code for bank 1, and misfires when cruising, no misfires on throttle. I don't understand why as I didn't get this on my old engine. Any ideas ? The only thing that I've changed is new plugs with a slightly smaller gap (.02 rather than .022), but I don't think that would affect this.

_N54 · 12-24-2020, 12:08 AM

Quote:

Originally Posted by Tyc0

The injectors have fixed the problem but now I get a fuel mixture control code for bank 1, and misfires when cruising, no misfires on throttle. I don't understand why as I didn't get this on my old engine. Any ideas ? The only thing that I've changed is new plugs with a slightly smaller gap (.02 rather than .022), but I don't think that would affect this.

Possibly a bad o2 sensor on Bank 1. Any other misfire faults?

Tyc0 · 12-24-2020, 04:06 PM

Quote:

Originally Posted by ///S58

Quote:

Originally Posted by Tyc0

The injectors have fixed the problem but now I get a fuel mixture control code for bank 1, and misfires when cruising, no misfires on throttle. I don't understand why as I didn't get this on my old engine. Any ideas ? The only thing that I've changed is new plugs with a slightly smaller gap (.02 rather than .022), but I don't think that would affect this.

Possibly a bad o2 sensor on Bank 1. Any other misfire faults?

No, no misfires codes at all, just the mixture control fault. Is there any way for me to confirm it's o2?

12-17-2020, 09:53 PM	#1
Tyc0 Lieutenant 151 Rep 517 Posts Drives: BMW e92 335i Join Date: Sep 2019 Location: Oregon iTrader: (0)	New engine, misfires For some background I just installed a new engine and moved all the accessories from my old block to the new one. In the process I took my injectors and put them into the block as well. Now I know that every time you take the injectors out your supposed to install new seals, but I took them directly out and into the new engine, each one was out for roughly 20 seconds before they went into the new block. Plugs and coils are brand new. Think I just need new seals ? Attached Images
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12-17-2020, 10:01 PM	#2
B58 Lieutenant Colonel 674 Rep 1,584 Posts Drives: Junk Join Date: May 2018 Location: USA iTrader: (1)	I would start with those seals first. __________________ 2024 X3 M40i - Stock 2015 Huracan LP610-4 - Stock 2014 BMW M5 - 1990 CRX Si - Restomod
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12-17-2020, 10:35 PM	#4
Tyc0 Lieutenant 151 Rep 517 Posts Drives: BMW e92 335i Join Date: Sep 2019 Location: Oregon iTrader: (0)	Ordered seals and couplers, will update when I install on Monday.
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12-21-2020, 01:36 AM	#5
Mustafa.e92 Lieutenant 215 Rep 499 Posts Drives: 2009 bmw 335i Join Date: Feb 2020 Location: Canada iTrader: (0)	U gotta code the injectors
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12-23-2020, 10:46 PM	#7
Tyc0 Lieutenant 151 Rep 517 Posts Drives: BMW e92 335i Join Date: Sep 2019 Location: Oregon iTrader: (0)	The injectors have fixed the problem but now I get a fuel mixture control code for bank 1, and misfires when cruising, no misfires on throttle. I don't understand why as I didn't get this on my old engine. Any ideas ? The only thing that I've changed is new plugs with a slightly smaller gap (.02 rather than .022), but I don't think that would affect this.
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