POD injectors and idle speed

[HHhuntitall]

So, I installed the new injectors, along with a new Colt Bumpstick, ATS exhaust manifold, BullyDog exhaust kit, Southbend clutch, NV4500, front seal, etc, etc. When I first bled the lines and fired it off, it didn't want to run. I thought I still had air in the lines, so I bled the injector lines a little more, but it still idled really low, say 300-350 rpm. Is that just the POD injectors? I've never installed upgraded injectors in a 1st gen, but in all the later models, I've never noticed any drastic differences in idle speed. This is the first 1st gen cam, so is the longer compression cycle affecting it that much?



I will say, I bumped up the idle, and when I went to drive it,... ... . WOW!!! I had to drive it again this morning before sunup. I think I'm in love with this old truck again!! It's always felt like it was "working" to get down the highway. It's not smooth like some of the other trucks I've owned. And mileage was pretty dismal. Now it feels like it wants to run away, kinda like my first '96. It's really smooth, easy on the throttle, and just jumps up and snaps to it.....



Anyway, anyone got a thought on that? Thanks,

 

[RSchwarzli]

First thought, I am green with envy.



Second though, dang thats alot of work.



As for the rest of your issue, did you change the timing or anything when you had the cam out? It would make sense that the cam would slow it down, but that much? What was idle speed prior to all of this?

 

[HHhuntitall]

I didn't touch the pump gear, I just put it back on the "E" designation, same as it was from the factory. It idled around 550-575 before. I changed so many parts, I don't know where to point the finger. I made a run in it this morning, and it's bad-a**, just FYI. I was wondering what to do with the turbo, so I left it stock to try it. It smokes pretty good if you dump the throttle, but it cleans right up and moves out. But I didn't touch the fuel screw or timing. I did take the throttle cable brackets off to access the injection lines, I wonder if the idle was being held by the linkage? I've not worked on this truck much, so I presume it was all stock, except three turns on the fuel screw 10 years ago. I guess it's running fine, but I was just curious as to why the drastic change in idle... .

 

[CLiberty]

Mine did the same thing, I think it`s due to the higher pop psi. that pods are set at. When I swapped out the pods for some 7x10`s that are set to the correct pop psi the idle speed went back up slightly with no other changes than the sticks.

 

[HHhuntitall]

Mine did the same thing, I think it`s due to the higher pop psi. that pods are set at. When I swapped out the pods for some 7x10`s that are set to the correct pop psi the idle speed went back up slightly with no other changes than the sticks.

Well, that's what I had hoped, thanks. I hope to get the rest of the bumper and spring setups back together towards the end of the week... . but I just got back here after moving a few cows the last two weeks..... what a pain!! But Dad and I started the combine and loaded one of the trucks with seed wheat today. It's cutting good, but what's that knocking sound coming from the header? :{ Just a few hundred acres left to go!! C'mon baby, hold together!!!!!