Daniel5691

Hi !
1981 928s euro 5spd
engine out staring at me on the stand lol.

I am looking at eight very forlorn and depressed fuel injectors,
I understand that some folks have replaced with a M+B injector that is shorter?
And others have sent injectors to "witch hunter"? for rebuild?

I'd apreciate your experiences with this part of the project, how did you decide which path to take? Is there anything specific that made you choose rebuild/ or replace versus the other ?

Thanks !

Dan

hacker-pschorr

"1981 Porsche 924 Fuel Injector"

This is the 928 forum....

CarPartsDiscount.com

My apologies, wrong link.

Daniel5691

Oh no worries ! !
everybody thinks the 924 944 and 928 are the same car anyway....
The "928 is the one with the 6 cylinder ! ! !" (referencing another thread here )

RennPartsDirect

Dan-
I sent mine from my '84 out to Witch Hunter Performance 5 years ago. They came back pretty clean and tested with the results. I installed them several years ago but still haven't finished my "engine" project. I cannot confirm or deny any positive or negative outcomes from their cleaning until the day comes that I get that car back together again...

I hope this greatly helps your decision making process.

Mrmerlin

uneekone I would suggest that you remove the injectors and put some MMo into them,
then test them with a 9 volt battery .
Then put them back into the bags and leave them there till your ready to install the injectors.

GlenL

I put the MB variants in my '80 Euro S and am happy with the results.

https://rennlist.com/forums/928-foru...injectors.html

jpitman2

Pretty sure OP has a CIS car, so IMHO best bet would be the shorter brass MB injectors. Several users have posted satisfaction with them, nobody has posted problems with them. The originals are pretty much unobtainable now, or $$$$. Keep an eye on fleabay though - I picked up 4 new originals a few years ago quite cheaply. A good 911 shop who knows CIS should be able to clean and test the injectors - my local one did it for me early in the car's time with me, failed 4, under $100.
jp 83 Euro S AT 56k

RennPartsDirect

Please forgive my ignorance but what is MMo? What am I looking for when I run a 9V battery across the leads? I installed them and they are dry- do you still think it's worth uninstalling them and rebagging them? What issues do you perceive happening if I don't do anything?

ltoolio

I know MMO = Marvel Mystery Oil.

The 9v is all Stan

LT Texan

No problems with the shorter MB injectors here.

Mrmerlin

9 volts to see if the injector will click.

NOTE usually after cleaning the injectors have some of the cleaning fluid in them,
and if left sitting they will gum up and freeze.

Thus when put into operation the injector will stay closed and the cylinder will not make power.

this happens more often that you think.

docmirror

Pretty sure it's CIS Stan. No voltage all mech.

I put the MB injectors in my Ferrari and they work fine. Most rebuild places won't touch CIS injectors. I think Sean has a home-brewed CIS injector cleaner and tester. Might contact him and ask.

Daniel5691

Perhaps a more precise question,
is there any reason, speaking from a function standpoint, why the M+B short injectors
would not be a wise choice?

Again, thanks for your much-appreciated insights here...
Dan

ltoolio

Completely unrelated - I was really confused when I first saw your avatar. Thought that McBoobs had made some changes.

Nicely done.