v-twins

Some of you followed my other thread about the misfire
Long story short, moving the injector from cyl4 to cyl3 also moved the error code from cyl4 misfire to cyl3 misfire


At this point I need a new injector for cyl3
Here are my questions:
1-Should I just replace that one injector and call it a day. If I do, I guess I should get another seals kit for the other 3 since they are coming out, or not needed?
2-Or is it worth replacing all 4 at the same time? AC Delco 12636111 on rockauto go for 110$ shipped. STANDARD ones are slightly cheaper... are they any good?
3-Replacing all 3 with the upgraded European injector and rail from ZZP, cheaper than buying 4 OEM ones. I almost did this then though if I would need a tune too. I current have the GMTU done and AutoWerksPerformance IC pipes. Do these injectors need a tune?


Thanks!

Oldblue

Drummerboy0088 has a set for sale


https://www.chevyhhr.net/forums/clas...ts-sale-57307/

It's an option

DrLoch

If you use the Opel injectors you need to change the fueling constant in the tune.

If you remove the injectors to replace one I would replace the seals as well.

v-twins

Thanks, will check it out

v-twins

So..remapping then...
what would the benefit be? Using E85 gas, and?


Ok... in case new seals (BTW the tool I 3D printed worked with a little modification due to the nature of the material, thanks for the drawings!). And I guess another intake seal (that I just replaced) and a new throttle body seal?

DrLoch

I used a wrong name.... it's not a fueling constant, it's really called an injector constant. In HPT it is milliseconds per percent fuel mass. That value has to be changed for the opel injectors since they they flow more fuel mass. The larger injectors are used when the power is increased and the std'd can't keep up with the fuel flow. That discussion is a whole new can of worms depending on your line of thought. Way more detail required than we need to cover in this thread for now.

BTW it has been determined that with the LNF E47 is the best bang for the buck. Check out 2005hhrauto posts about E47 he has the most experience with it on this site.

You wouldn't need to replace the TB seal.

v-twins

Done, replaced all injectors, car runs good again!

DrLoch

Great news..