injector tunning?

Clouse2411 · Jul 19, 2012

Well i recently upgraded to farmers 400/400 injectors and my truck is running like crap since I put it back together. Got the tune for them and everything, still runs bad. Some of the injectors are returning more oil than the others. I was thinking it was an injector problem so I called farmers and they said to take the solenoids off the injectors that are returning poorly and turn whatever is under there 180* and try it again. Does this make since to anyone? And what is this doing to my injectors? Any tips are appriated. It idles poorly and doesnt seem like all the power is there with them.

BigAlsPSD · Jul 19, 2012

Clouse2411 said:
Well i recently upgraded to farmers 400/400 injectors and my truck is running like crap since I put it back together. Got the tune for them and everything, still runs bad. Some of the injectors are returning more oil than the others. I was thinking it was an injector problem so I called farmers and they said to take the solenoids off the injectors that are returning poorly and turn whatever is under there 180* and try it again. Does this make since to anyone? And what is this doing to my injectors? Any tips are appriated. It idles poorly and doesnt seem like all the power is there with them.

Partially makes sense...Sounds like he might think the poppets aren't clocked properly, but I would think if they were just received they should be...

Clouse2411 · Jul 19, 2012

I thought the same exact thing. Not to bad mouth them but they were about 4 or 5 weeks behind when I should've had them. Is there a way to get them exactly where they need to be so I'm not toying around with them for hours?

BigAlsPSD · Jul 19, 2012

Under the solenoid is the armature plate, it should be either a small torx, or allen. What you are looking to do is find that slight "catch" and it can be very slight, where the poppet falls into the groove in the seat. Then carefully retighten the screw hoping to keep the armature plate lined up correctly.

BigAlsPSD · Jul 19, 2012

Here is a pdf of the parts...

Clouse2411 · Jul 19, 2012

Alright, thank you Al. I will keep this updated and hopefully it works out!

BigAlsPSD · Jul 19, 2012

If you turn the armature plate you should feel a very slight catch, at that point you want to realign the armature plate and tighten the screw fully. Good luck. Hope you find this to be the issue, as it is an easy fix.

907DAVE · Jul 19, 2012

That "catch" is only there on used injectors, right?

Are these not new/ rebuilt injectors?

BigAlsPSD · Jul 20, 2012

907DAVE said:
That "catch" is only there on used injectors, right?

Are these not new/ rebuilt injectors?

True, it would be where the poppet had "seated" itself.

DZL JIM · Jul 20, 2012

Clouse2411 said:
....so I called farmers and they said to take the solenoids off the injectors that are returning poorly and turn whatever is under there 180* and try it again. Does this make since to anyone? And what is this doing to my injectors?...

Wow....really?
If he doesn't know that he messed up the poppet seat they will never work right.
That's what flow testing is all about. I don't know for sure if he flows them or not. I'd bet they were not flow tested, if they were he would have found any issues in the poppet area that would make him think turning the poppet would do any good.
And if not why in the world would you build/sell an injector that big without lots of time on the flow bench flow matching them?
Just saying....

Good advice above, however. You need to find that "catch" as it was put, it's the original seat for the poppet. It's the best chance you have to get them to seal. If you can't find it it might never seal up. Or at least take a year or so of daily driving to maybe make a new seat.

Otherwise have you checked ICP, duty cycle, etc?

Hotrodtractor · Jul 20, 2012

DZL JIM said:
Wow....really?
If he doesn't know that he messed up the poppet seat they will never work right.
That's what flow testing is all about. I don't know for sure if he flows them or not. I'd bet they were not flow tested, if they were he would have found any issues in the poppet area that would make him think turning the poppet would do any good.
And if not why in the world would you build/sell an injector that big without lots of time on the flow bench flow matching them?
Just saying....

Good advice above, however. You need to find that "catch" as it was put, it's the original seat for the poppet. It's the best chance you have to get them to seal. If you can't find it it might never seal up. Or at least take a year or so of daily driving to maybe make a new seat.

Otherwise have you checked ICP, duty cycle, etc?

:whs:

woodduck97 · Jul 20, 2012

907DAVE · Jul 20, 2012

Sometimes you just cantwin......

Hotrodtractor · Jul 20, 2012

907DAVE said:
Sometimes you just cantwin......

LOL

pjwoolw · Jul 20, 2012

Clouse2411 said:
Well i recently upgraded to farmers 400/400 injectors and my truck is running like crap since I put it back together. Got the tune for them and everything, still runs bad. Some of the injectors are returning more oil than the others. I was thinking it was an injector problem so I called farmers and they said to take the solenoids off the injectors that are returning poorly and turn whatever is under there 180* and try it again. Does this make since to anyone? And what is this doing to my injectors? Any tips are appriated. It idles poorly and doesnt seem like all the power is there with them.

So how did it run before the injector swap?

Clouse2411 · Jul 20, 2012

The truck ran awesome with my stage ones in it.

ICP and duty pressure are decently good for a stock 15* I will upload a couple of videos of it running.

pjwoolw · Jul 20, 2012

Which injectors are you running now? 400/400 I would expect DDs. What is commanded and actual pressure are you seeing ICP wise at idle?

Maybe a little history about your rig might be helpful.

Vader's Fury · Jul 20, 2012

Clouse2411 said:
The truck ran awesome with my stage ones in it.

ICP and duty pressure are decently good for a stock 15* I will upload a couple of videos of it running.

That right there could be a big part of your problem.......

907DAVE · Jul 20, 2012

How does that affect the poppet seats?

Clouse2411 · Jul 20, 2012

I was running a stealth diy kit before this and ran like absolute crap. Talked to a guy at farmers and he said I could get away with a stock 17* with these. I had the 15* laying around so I through that one.

Just went out and it fired right up and ICP was at 850ish psi at 15% dc