full flow, high idle

[Jonesy]

Turned up the fuel screw after taking a hour to get the lock nut off, and by the time I did I was'nt sure what the original settings where. so I turned it up to about 6 threads showing and started it, and the idle was real high, so then I had to wrestle with the idle adjust nut for another hour and I couldnt get the idle back down. Had to drive it to work with the high idle. but what a differance in performance, my boost went to 26 like a shot and not even wot. I had to readjust fuel screw to bring idle down. any ideas on how i could leave the screw turned in and have a lower idle. Thanks in advance.

 

[Stomp]

You are going to have to adjust the idle screw. I think that pastor Bob has some pics in his gallery that shows which screw it is. Its not easy, but it can be done. I know that snap on makes a special wrench, but it can be done without it. I think I used a dremmel to trim the screw, but it is not the preferred method. I am sure that someone else will jump in and tell you how to get it done without the power tools.



Stomp

 

[phillips5]

Do not turn the screw in more than 3 turns run away engine can result. 3 mite be two many most peoplr only go 2 turns. when you go too many the engine can take off and fly while you are in the house tieing your shoes.

 

[bgilbert]

Seems like I used a 1/4" drive ratchet, 3 or 4" extension and it was very easy to break the locknut loose on the low idle screw, then probly used a long skinny screwdriver or same 1/4"drive ratchet, extension + screwdriver bit , I can't remember but it was easy, with the right tools in the box. How much did your EGT's change? Better watch them, with high fuel adjustments.

 

[Stomp]

Now come on guys I have mine burried and I have no problems. I have set other pickups like this and still have no problems.

Stomp

 

[Greenleaf]

All pumps will react a bit differently. Simply turning in this fuel screw will only net you a base-line of performance, it's the other mods in combo with this that will get you into trouble with the EPA/local law enforcement



I have my pump at, say, two and a half turns in. At near three it runs away. You have to go inside the pump and perform mods which will allow further adjustments beyond the screw. Yes, the slow idle will jump up. If you go far enough w/the fuel screw, your slow idle adjustment screw is worthless.



-S

 

[JLEONARD]

I think I used a dremmel to trim the screw

:-laf :-laf



So did I.

Jay

 

[GWoody]

I just took a pair of pliers and bent the metal piece that contacts the idle screw.

 

[dpuckett]

I, along with several other members here, have used a flat screwdriver as a chisel to break the jambnut loose, then had to get a smaller screwdriver to turn the screw itself. Easy procedure, except for the fuel line in the way of mine right now.



Greenleaf, I beg to differ about the power screw not getting you in trouble with SMokie and the Egotistical Pinhead Admin. If I turned mine in that far, I'd leave a cloud big enough to engulf Smokie and his cruiser.



Daniel

 

[Greenleaf]

Egotistical Pinhead Admin

engulf Smokie and his cruiser.

:-laf :-laf :-laf



Thats a good'n!!



Daniel, are you "BACK" in the swamp!!!???



-S

 

[dpuckett]

unfortunately.

 

[Jonesy]

Sorry took so long to get back. I already adjusted the idle pin and the idle would not go down far enough. I ended up turning the fuel screw out 1. 5 turns to get idle down. Sure did like the way it performed in so far. I would say it's in 2turns now and still performs better than before. Makes me think about getting new injectors. You guys out there non-intercolled which ones worked best for you.

 

[BushWakr - RIP]

Eeegaddssss... . now see what y'all have done... .

Jonesy, if the full fuel screw drags your idle up too far for the idle screw to compensate, then you need to lengthen the adjustable throttle rod.

You loosen the two lock nuts, turn the rod slowly till the throttle plate touches the low idle screw, then tighten the two lock nuts and you're good to go.

Did you try that yet????... if not have a wack at it...

Please look at the pics in my gallery. You will see the rod w/lock nuts, and you'll also see something called the "breakover spring".

The rod and breakover are both affected by the rod adjustment so look at the pic that shows the proper breakover spring position.

You should be able to get some of your fuel back if you go at this like I describe... . if not, call daniel or greenleaf... it's all their fault you know...



pb...

 

[Jonesy]

Pastor did all that, gonna save for some injectors, got a taste and want more

 

[bgilbert]

Makes me think about getting new injectors. You guys out there non-intercolled which ones worked best for you.

POD'S are what I have. You need to spend the extra $48 for adaptor tips for the new injectors.

 

[dpuckett]

Pastor, how is it MY fault? It seems you have done a little fiddling with the screw in your time, as well. :-laf



Jonesy, if you turned your power screw down to get your idle back to normal, I'd say you are within half a turn of where you started. In my experience, it dont take much to raise the idle. HAve you messed with the AFC? That REALLY wakes up your bottom end, not to mention the smoke Nazis. AND, if you can wait a little while, my EDMs will be for sale in a few months- getting a new head (and injectors) if I can work enough here in the muddy swamp to afford it. AND, no adaptor tips required with these. If you DO get some PODs, or some other 7mm tip injectors, PDR has the best prices I've seen so far- CaseIH wants $12. 50 apiece for them!! They seem to be close to Cummins on most things. Might get ahold of some guys who have done a HG and got the kit- they come in the kit.



Daniel

 

[Jonesy]

dpuckett pm me and let me know what you want for them

 

[mdatc]

Trying to gain an understanding!!!!! You more-or-less turn the full fuel screw in till the idle increases???? Then back off the low idle screw??? This should result in some black smoke at some point???? What do you do about the collar on the fuel screw??? Can you unscrew it to cut the collar off??? I don't think I can come close to 2-3 turns. As you can tell - this is very new to me!!!

 

[Stomp]

mdatc

Thats exactly what you need to do. If you have gages that is. If you do pull the screw out to get the collar off you might need to prime the fuel system to get it to start again.



Stomp

 

[mdatc]

Now then, is this adjustment considered the STAGE 1 "Modest adjustments of the injection pump"?? or are there others at this stage??? How does this tie in to the other forum thread that indicates "over-adjustment of the full-load screw results in high idle and eventual erratic governor operation"??? Would this be considered an over-adjustment?? I'm trying to piece all the pump adjustments together in a systematic manner to result in approx output of 230hp. I had previously turned the full fuel screw approx 3/4 turn with no noticeable black smoke or results!!!!!