Did you clean the dashpot?

 

I cleaned it.

I ran a couple of tests. Like what philbert said. I unscrewed it completely and did not have any issues. I drove down the street giving the truck light revs to try to get it stick.

It seems the more screw I have on the dashpot the more likely it gets stuck. So whats the reason for the dashpot? To reduce the drop in rpms?

Do I just drive with the screw no touching the dashpot????

 

I'm willing to bet your VTV is clogged. Have you cleaned that out with some IPA and then compressed air?

 

The dashpot is there to prevent backfires when you let off the gas. If it weren't there, and you were on the throttle and then quickly let off the gas, the throttle plate would snap closed quickly - this could cause some backfiring. The DP acts as a buffer to slow down the throttle closing, if just breifly, to avoid backfiring.

It's OK to have the DP screw not touching - same as not having a DP altogether since it's not doing anything at that point. I just thought by eliminating it from the equation you could see if it was indeed the stuck DP that was causing your idle issues, versus aybe the TPS, like Swadoosh was suggesting.

 

Yeah I already recommended he do this in the last page of the thread. I'm not sure if he did it though.

 

Another thread just reminded me of something I can't believe I forgot to mention. Air in your coolant system can cause a high idle as well. Make sure to burp your radiator thoroughly with the heat on high.

 

I shot this with some brake cleaner. Thats it. I'll have to go get some compressed air to re do the process.

Last night I was driving the truck around the block with the screw completely up and while I was coasting I was lightly tapping on the gas (in neutral) to get the idle to stick. It did not. However I will be doing it again since today is a new day.

For giggles I went to the dealership. That dashopt (diaphragm) is 130 bucks. I laughed. It's also discontinued. I laughed again.

 

Burp her before you go spending any money.

 

She's been burped since we put her back together. I will do it again.

Since I cleaned the VTV I'm getting the same thing. This time I've been loosening the screw less and less. Right now I have a couple of turns left before there is no contact.

During this I've been getting less stickage.

 

It hangs at a thousand RPM's however if I give the gas a little tap it will bring the idle to the 800 range.

 

Sounds like you have found your problem then. I had to adjust my screw to achieve a good 800 idle as well.

 

I'm not sure if I'm liking this.

Letting off the gas at times I get fed back from the motor. This is because the rpms are dropping too fast when I shift.

I guess it is what it is for now ... until I find a replacement.

 

I kind if like it on mine but to each his own.

Maybe remove the dashpot and give it a thorough cleaning?

 

Ugggh, again!?

It seemed functional when I had it off and working that spring but I dunno. Instead of brake cleaner, what do you recommend?

Maybe next weekend I will try soaking the dashpot. Tomorrow I start my new job, so I will be occupied with that.

 

Nothing in particular.

Soak in solvent, then use lithium grease to really live it up. Also, like Sqwadoosh said, make sure the filter on it is clean.

 

So yesterday I changed the oil for the first time. I've also checked the head bolts. 2 had to be tightened a little. I also loosened up the throttle cable a little and adjusted the stop screw. I was just guessing and where I left it has been good. No issues with the throttle. (knock on wood).

HOWEVER TODAY!

When I was checking the tightness of the valve cover I see some red liquid between the corner of the oil pan and the timing cover. ˟˟˟˟, really? 2 bolts that hold the timing cover and block together were loose. When I tightened them, coolant started dripping on the side. Really?

Screw it. I go underneath and check the nuts on the oil pan. Just about every nut I had to tighten!!

1200 miles and I'm having this????

What are your thoughts?

 

When you put those bolts on for the first time did you dab the threaded ends in silicone so they'd "cement" in more?

 

Nope

 

Sorry man - yeah, it's usually in the fsm when you're doing the oil pan and timing cover - you dab some FIPG on the ends of each bolt before you put it on. Helps keep the bolts in, and also helps avoid smaller leaks here and there.

 

Dang dude. Thanks a lot for the tip. I mean sucks that that happened but I leanred something off your leak situation lol. Ill make sure to do the same thing if I ever need to do a similar job.