Short back story, bought truck with aftermarket gov springs already installed by previous owner. Idle was low when I bought it (550-600rpm). Day after purchase, tried to adjust idle up to 750rpm. Anything above 600rpm would cause throttle to hang or even cause the RPMs to rise on their own. Not linkage related problem. Turned idle back down to 600 and drove it. Only issue I have, is that I can't hold 1200rpm with the throttle. It either wants to jump up to 1800rpm, or just fall back to idle.
Why do I want to hold 1200? It's cold outside, and I bought a high idle solenoid to keep the idle up.
Read on here that gov springs could be set too tight? Finally pulled the plug on the side of the pump, and checked them out. The stud was sticking through the nut quite a bit. I've read that you can loosen the nut with a screwdriver, but that wasn't possible on mine due to the stud protruding.
So, i made a tool to loosen the nut (like a flat head with the center cut out).
Began loosening the nut, and it took a half turn to make a "click". From reading that you should be able to loosen the nut with a screwdriver, I assumed that the previous owner over tightened them by a lot.
So, after that initial click (which took half turn), I loosened them 2 more clicks (which only took 1/4 turn each). That put the nut approx 0.030" ABOVE the stud. Now you could adjust nut with a flathead like I've read.
Spun the engine over, and the other spring set was identical... First "click" to loosen was half turn, and each after was only 1/4 turn.
Set it to match other side. Approx 0.030" above stud.
Put it all back together, and truck wouldn't start without throttle. Bumped idle screw up to where truck would start, and now the throttle hangs even worse than it did before. Again, not linkage related. I can back idle screw off completely (to where truck won't run without throttle) and there are no issues with throttle hang.
So what's going on here? I pulled afc housing and fuel plate off to look down inside and see if anything were binding, but I really have no idea what I'm looking at. I'm probably not the right person to be doing this, as I've never done it before, but hoping for a miracle.
Does the pump need to be rebuilt or something?
Why do I want to hold 1200? It's cold outside, and I bought a high idle solenoid to keep the idle up.
Read on here that gov springs could be set too tight? Finally pulled the plug on the side of the pump, and checked them out. The stud was sticking through the nut quite a bit. I've read that you can loosen the nut with a screwdriver, but that wasn't possible on mine due to the stud protruding.
So, i made a tool to loosen the nut (like a flat head with the center cut out).
Began loosening the nut, and it took a half turn to make a "click". From reading that you should be able to loosen the nut with a screwdriver, I assumed that the previous owner over tightened them by a lot.
So, after that initial click (which took half turn), I loosened them 2 more clicks (which only took 1/4 turn each). That put the nut approx 0.030" ABOVE the stud. Now you could adjust nut with a flathead like I've read.
Spun the engine over, and the other spring set was identical... First "click" to loosen was half turn, and each after was only 1/4 turn.
Set it to match other side. Approx 0.030" above stud.
Put it all back together, and truck wouldn't start without throttle. Bumped idle screw up to where truck would start, and now the throttle hangs even worse than it did before. Again, not linkage related. I can back idle screw off completely (to where truck won't run without throttle) and there are no issues with throttle hang.
So what's going on here? I pulled afc housing and fuel plate off to look down inside and see if anything were binding, but I really have no idea what I'm looking at. I'm probably not the right person to be doing this, as I've never done it before, but hoping for a miracle.
Does the pump need to be rebuilt or something?