test new injectors?

romero1990 · 07-12-2021, 09:26 PM

HI all, I bought a new set of injectors to replace the ones in the car (130k miles). How do I test if the new injectors are working before putting them on? AFAIK, a stuck injector will cause hydrolock and break the engine. I feel it is necessary to test before putting them in for good.

pbonsalb · 07-12-2021, 09:45 PM

Most people don’t test them first. I just swapped the new ones in. But if you insist, put them in a rail that fits this type of injector since you probably do not have any other type of injector holder (you may not have any rails, either) and apply 12V and touch the other wire to ground. Of course this won’t tell you much other than that the injector sprays. What a worrier or someone very thorough would do is send the new injectors out to an injector tester to test flow and spray pattern. I have done this before.

DukeofAlexandria · 07-13-2021, 06:00 AM

Quote:

Originally Posted by romero1990

HI all, I bought a new set of injectors to replace the ones in the car (130k miles). How do I test if the new injectors are working before putting them on? AFAIK, a stuck injector will cause hydrolock and break the engine. I feel it is necessary to test before putting them in for good.

If they are new like you state, why are you worried? I've replaced a multitude of injectors in my time and never found any to be defective. Furthermore, you'll usually be able to hear a non firing cylinder long before you do any damage.

But like pbonsalb said, if you're that worried, apply 12V to each injector to see if they start clicking/opening. I personally wouldn't find a rail to put them in, but would just bench test. Either method will work though, good luck.

-Duke

pbonsalb · 07-13-2021, 10:12 AM

It is a pain to set up with fuel at the correct pressure and an injector holder. On simpler cars you can just pul the rail and injectors out of the manifold and spray into a long thin container. Not easy on the S65. Plus if you are this worried you want to know the flow and pattern is correct and that is most easily done by sending them out for testing. Might be $25 each injector. Marren, Five-O, RC Engineering and many other shops offer this service.

SAMM3Y · 07-13-2021, 11:17 AM

You can send them away for testing if you don't need to install immediately. Also check for a local service. I live in Sacramento and there's a guy named Dr. Injector who tests for $10 per/injector. Cleaning and replacing orings cost an extra $15/per. But if they're new oem I would simply install.

kolosy · 07-13-2021, 12:01 PM

Quote:

Originally Posted by romero1990

HI all, I bought a new set of injectors to replace the ones in the car (130k miles). How do I test if the new injectors are working before putting them on? AFAIK, a stuck injector will cause hydrolock and break the engine. I feel it is necessary to test before putting them in for good.

you got your eeuroparts ones delivered too, didn't you

romero1990 · 07-13-2021, 12:13 PM

Quote:

Originally Posted by kolosy

Quote:

Originally Posted by romero1990

HI all, I bought a new set of injectors to replace the ones in the car (130k miles). How do I test if the new injectors are working before putting them on? AFAIK, a stuck injector will cause hydrolock and break the engine. I feel it is necessary to test before putting them in for good.

you got your eeuroparts ones delivered too, didn't you

lol yeah. one of the box was a little smashed. I'm like "hmmmm" and then going into "should I test them or just use"

tsk94 · 07-13-2021, 02:21 PM

Take them to a shop and have them tested and cleaned if necessary. Simple.

Vedubin01 · 07-13-2021, 02:56 PM

Quote:

Originally Posted by kolosy

Quote:

Originally Posted by romero1990

HI all, I bought a new set of injectors to replace the ones in the car (130k miles). How do I test if the new injectors are working before putting them on? AFAIK, a stuck injector will cause hydrolock and break the engine. I feel it is necessary to test before putting them in for good.

you got your eeuroparts ones delivered too, didn't you

The ones for $20 each?

Senpai · 07-13-2021, 02:59 PM

I've been wondering about the eeuro ones as well. Are they they genuine bosch?

kolosy · 07-13-2021, 05:04 PM

Quote:

Originally Posted by Vedubin01

The ones for $20 each?

yup

Quote:

Originally Posted by Senpai

I've been wondering about the eeuro ones as well. Are they they genuine bosch?

they've got the verification stickers on them, and look official. i'll try one of the codes and see, but don't have a reason to suspect otherwise.

romero1990 · 07-13-2021, 08:03 PM

they looks legit to me so far

Senpai · 07-14-2021, 06:49 AM

Just placed my order for a set to keep around as spares. Can't beat this price.

Vedubin01 · 09-30-2021, 10:33 PM

Quote:

Originally Posted by Senpai

Just placed my order for a set to keep around as spares. Can't beat this price.

Any feedback on these ?

romero1990 · 09-30-2021, 11:40 PM

mine are in for 1+ month and seems running very good so far

Senpai · 09-30-2021, 11:49 PM

Quote:

Originally Posted by Vedubin01

Any feedback on these ?

I'll be installing my set soon and they did verify they're legitimate bosch injectors.

07-12-2021, 09:26 PM	#1
romero1990 Lieutenant 176 Rep 586 Posts Drives: E92 M3, F25 X3 Join Date: Sep 2018 Location: Bay Area iTrader: (0) Garage List 2017 X3 [0.00] 2009 M3 [0.00]	test new injectors? HI all, I bought a new set of injectors to replace the ones in the car (130k miles). How do I test if the new injectors are working before putting them on? AFAIK, a stuck injector will cause hydrolock and break the engine. I feel it is necessary to test before putting them in for good.
	Appreciate 0 Tweet Quote

07-12-2021, 09:45 PM	#2
pbonsalb Lieutenant General 5231 Rep 10,614 Posts Drives: 18 F90 M5, 99 E36 M3 Turbo Join Date: Feb 2011 Location: New England iTrader: (4)	Most people don’t test them first. I just swapped the new ones in. But if you insist, put them in a rail that fits this type of injector since you probably do not have any other type of injector holder (you may not have any rails, either) and apply 12V and touch the other wire to ground. Of course this won’t tell you much other than that the injector sprays. What a worrier or someone very thorough would do is send the new injectors out to an injector tester to test flow and spray pattern. I have done this before.
	Appreciate 0 Quote

07-13-2021, 10:12 AM	#4
pbonsalb Lieutenant General 5231 Rep 10,614 Posts Drives: 18 F90 M5, 99 E36 M3 Turbo Join Date: Feb 2011 Location: New England iTrader: (4)	It is a pain to set up with fuel at the correct pressure and an injector holder. On simpler cars you can just pul the rail and injectors out of the manifold and spray into a long thin container. Not easy on the S65. Plus if you are this worried you want to know the flow and pattern is correct and that is most easily done by sending them out for testing. Might be $25 each injector. Marren, Five-O, RC Engineering and many other shops offer this service.
	Appreciate 0 Quote

07-13-2021, 11:17 AM	#5
SAMM3Y Colonel 3085 Rep 2,747 Posts Drives: 2008 m3 Join Date: Feb 2018 Location: NorCal iTrader: (2)	You can send them away for testing if you don't need to install immediately. Also check for a local service. I live in Sacramento and there's a guy named Dr. Injector who tests for $10 per/injector. Cleaning and replacing orings cost an extra $15/per. But if they're new oem I would simply install. __________________ 9ers
	Appreciate 0 Quote

07-13-2021, 02:21 PM	#8
tsk94 Lieutenant Colonel 1522 Rep 1,591 Posts Drives: E92 M3, E82 128i, F82 M4, E36 Join Date: May 2017 Location: Calgary iTrader: (2)	Take them to a shop and have them tested and cleaned if necessary. Simple.
	Appreciate 0 Quote

07-13-2021, 02:59 PM	#10
Senpai Major 482 Rep 1,225 Posts Drives: E90 M3 Join Date: Apr 2013 Location: New Jersey iTrader: (12)	I've been wondering about the eeuro ones as well. Are they they genuine bosch? __________________ Jerez Black E90 M3 6MT KW-AP Racing-Volk-Varis-Akrapovic-Recaro
	Appreciate 0 Quote

07-13-2021, 08:03 PM	#12
romero1990 Lieutenant 176 Rep 586 Posts Drives: E92 M3, F25 X3 Join Date: Sep 2018 Location: Bay Area iTrader: (0) Garage List 2017 X3 [0.00] 2009 M3 [0.00]	they looks legit to me so far
	Appreciate 0 Quote

07-14-2021, 06:49 AM	#13
Senpai Major 482 Rep 1,225 Posts Drives: E90 M3 Join Date: Apr 2013 Location: New Jersey iTrader: (12)	Just placed my order for a set to keep around as spares. Can't beat this price. __________________ Jerez Black E90 M3 6MT KW-AP Racing-Volk-Varis-Akrapovic-Recaro
	Appreciate 0 Quote

09-30-2021, 11:40 PM	#15
romero1990 Lieutenant 176 Rep 586 Posts Drives: E92 M3, F25 X3 Join Date: Sep 2018 Location: Bay Area iTrader: (0) Garage List 2017 X3 [0.00] 2009 M3 [0.00]	mine are in for 1+ month and seems running very good so far
	Appreciate 0 Quote