siemens deka 80lb injectors?

[darnie1987]

is there anyone running these injectors on a stock fuel rail? im trying to run them on my truck 2004 lm7 5.3 and was wondering how people were getting them to fit right since they are alot higher? thanks for the help.

[farmtruc]

So is that the big vac leak?

[darnie1987]

i dont think so... the issue i found tho is that they dont leak fuel but that you can turn them fairly easy and if you do they will leak then. also the drivers side injectors seem to lean towards the rear of the motor and the passengers side seem to lean towards the front? doesn't seem normal to me? im not sure if this is the issue but have been told if the injectors arnt in the right angle it can mess up the mixture or something in the chamber and make tuning hard? im going to try and fix it but im going to just take the truck down to Tuscon and have them fix/ go through the truck and hopefully have it running. im going to try and build some spacers for the rail tho and maybe a bracket to have them sit right if needed.

[ShredSled]

Angling on each side is normal, but all depending on HOW much they lean! Just a little...
Solid spacers are a must! When you make the spacers, keep in mind that as they get taller and grow in height, they will also have to move slightly in the direction of the angle lean so the injectors aim straight down their bore, otherwise yeah you'll be spraying the walls.
I had similar issues with a set of racetronix injectors, but I think yours are even taller.

Also, it sounds like you have the wrong o-rings. They should spin if forced, but definitely not too easily.

Check all the o rings I just went through!

[darnie1987]

great info thanks man, im going to just order some new orings. the ones i got a gm ones they are black not sure the part number. im going to mess with this on my next days off. last night i took the broken rail out and installed the new stock one i got, and though everything was good but the back two injectors were leaking alittle were the injector meets the rail. does anyone have any pictures of how they have there spacers and what the angle of the injectors should look like.