Installed the gov. spring today. Wasnt too bad. Hardest part was getting to the screw on the back of the pump closest to the engine. Anyway. when I went to start my truck after the install, it idled very low, in fact so low it wouldnt keep running. I put my idle screw right back in the same position as it was, which is about 1/4&quot; sticking out. <br><br>However, to get it up to 800 with the a/c on, I had to move it out at least 1 1/4&quot; from it beng flush with the pump housing. Is this normal? I am thinking I may have splined the linkage on wrong when going back onto the shaft.<br><br>Truck seems to run fine. Havent had time to drive it very much...just one test run. Had to take the radiator out and send it off to get repaired.

 

I think you are right and got your throttle lever off a tooth. I marked my lever when I pulled it to be sure it went back on right. with it the way it is now it may not get full throttle. the lever may go to full but the shaft wont. ;D

 

Monty,

The easiest way to get at those darn screws is to &quot;de-time&quot; your pump a bit. You can always move it back in place, snug up a single bolt and start it up for checking your idle.
It sounds like you are off on the &quot;index&quot; splines as you said.
I spent a good 3 1/2 hours today, taking the top/afc off a pump, doing some macro-photography, step by step showing the gov spring install. When I get the pics developed, I'll scan them in and post them for adding to the install text I did recently.
I found that the indexing was a little tricky even with the pump on a bench. Back your idle screw out to the correct position, then undo the allen cap screw, reposition the indexing marks/shaft. I found the the insides can be misaligned. With the inner lever/spring mount set correctly I believe the shaft should rotate CC when viewed from the top.

Also another heads up I found today....
I don't know if it was the &quot;tired&quot; pump I was working with or not but the throttle shaft, which has the splining on it, can &quot;sag&quot; down into the AFC housing on re-installing the throttle lever.
If you aren't looking closely, or you can't get the throttle lever to &quot;engage&quot; properly during reassembly you need to spin the big allen screw back on a few turns and pull up firmly on the thing. This will tug the throttle shaft up into the proper position. It seems all it takes (at least on this pump) is to missalign the shaft/lever a bit and push on it.. that will result in the shaft &quot;settling&quot; downward just a hair and it won't engage the throttle lever.
Another potential problem is this... if the shaft does 'settle' on your pump, you may find the o-ring seal on the shaft will weep fuel.

As an aside,... the picture taking was a challenge all on my own. In macro-photography, 1/4&quot; means good/bad focus... and that's just on the primary subject, you should see what it does on your depth of field.....then came the rain squals... ever try to hold an umbrella, a camera, and a pump top while pointing at something with your 5th hand.... geeeezzzzzz....
Of course, wildman mark says I'm the only guy he know's who is so skinny I can dodge ( ) rain drops...


Friar Bob.

 

Thanks fellas, I thought something may be wrong. Never donned on me until I got in the house. Bob, I did detime the pump. But only to its original position. So, getting to the back screw was probably my fault. I think that on a manual trans. equipped truck it will be just fine to leave the throttle shaft and linkage on. Looks like to me all you would have to do is cut a little of the plastic shim that is over the allen screw.

BTW...what number was your spring when you took it out? The last three numbers on mine were 388.

Thanks for taking the time to get some pics Bob. I totally forgot about it.

 

Monty,<br><br>I had time to get up close and personal with the components but I'd hesitate to do any 'trimming' of shims personally. But, what ever floats your boat... just don't float your boat in my direction... ;D <br>I'd think it would be very important to have the throttle shaft in the full up position or you may have some internal binding if it is out of position...<br>My schematic for the VE shows the stock spring number is...<br>1-464-650-388.<br>Maybe it was 'language' that caused some confusion here.... when I say throttle shaft, I'm referring to the shaft protruding from the AFC housing... and the throttle rod is the 'arm' that goes on top of the shaft... OR maybe I need to go lay down... ;D <br><br>Bob

 

Nah....I read ya loud and clear Friar Bob. [undecided] <br><br>Looking at the allen screw in question, you will see that the shims edge sticks over halfway of the hole. You should be able to trim that off and not do any harm as far as &quot;shimming&quot; goes...as it is the edge that sticks out.

 

Ahhhh... ok, now I'm at speed with ya.... ya... now that you mention it... that would help make things easier in general.. good catch bud...<br><br>bob.

 

Well, I got the radiator put back in, and the throttle set right on the index shaft. Took her for a spin. Heckuva lot better. She nails 3k and just keeps goin. Give it a nice 5th gear punch at 70 and it just keeps goin past 90. Look at the EGT gauge and she is bottoming out at 1600* . Got scared there and backed out. Cruising temps may be up 50. Havent taken it over 3200 yet. Give me time though. <br><br>Oh, did I mention a bigger turbo will be needed. ;D

 

Sweeetttt..... welcome to the &quot;Thermo nuclear research department&quot; were it pays to keep you cool.... ;D <br><br>bob..