For the idle, you can find someone with BUDS or MaptuneX and do a throttle reset. This resets the TPS and throttle body and re syncs them. You will need BUDS to reset the DPS also.

 

Oh yes I did that as well, not recently though, I have a candoo pro. I will try that report back

 

Well I did the tps Initialization. Still didn’t help at all I guess I’ll tear it down and adjust the valves on the max side of the limit. Unless anybody else has any other ideas but I’m about ready to run my head through a wall

 

When it drops RPM you can hear a clank. What are your clutches looking like?

 

I don't know much about the clutches, I have never messed with them, I will read the service manual and tear apart and let you know. Thank you for all your help

 

Can you pull the clutch cover off and then let it idle and watch the clutches or even take a video of them? That might help diagnose before you have to take a bunch of stuff apart.

 

You guys might be onto something here. I don’t know much about the clutches on these things, like I said before, but it seems like there’s some unusual movements. I attached the video below, do you think it be worth my time tearing this thing down, specking all the components and cleaning it up?

0 new items by James Shumaker

photos.app.goo.gl

 

I can't tell if the erratic idle is making the clutches chatter or if the clutches are dragging the engine speed down.

How many miles are on them? Probably a good idea to service them even if it doesn't solve the idle problem.

 

There is 16500 miles on it.😲 I actually tore down the clutches and specked out everything, everything was within spec, and, in the secondary clutch, the torque gear was broken, other than that everything looked great.

I started the engine with the clutches removed and the erratic idle is still present. I am waiting for a new torque gear and some of that specialty grease for the one way bearing and I will put it back together.

Anyone know what else I am missing?

James

 

Have you taken it out and beat the snot out of it since you fixed all this stuff? Serious question.

 

Yeah I have, all those parts that I’ve replaced have been over the past year, I usually give it time to try to figure things out, two of the major issues on this thing was the coil and wires, once I replaced them it ran great but still not where I want it at idle. The only thing I have replaced that has not been really run hard yet is the O2 sensors.
And in transparency the thing runs absolutely perfect right now when not at idle, every now and again it will hiccup once in wide-open throttle over maybe 10 to 15 seconds. But it’s just the idle will not straighten up

 

Do these have an IAC valve? What does the throttle body use to meter air at idle? Did you clean any carbon or crud or oil from all of the air intake stuff? Also have you put a vacuum gauge on it? I'd be curious to know how much vacuum it has at idle compared to another similar unit.

Overall it's really not bad sounding, could just be how Maverick with a bunch of miles idles.

 

Do these have an IAC valve? What does the throttle body use to meter air at idle? Did you clean any carbon or crud or oil from all of the air intake stuff? Also have you put a vacuum gauge on it? I'd be curious to know how much vacuum it has at idle compared to another similar unit.

Overall it's really not bad sounding, could just be how Maverick with a bunch of miles idles.

No there is no IAC on this old unit, it uses a MAP sensor to meter the air. I have swapped the MAP and butterfly (TPS) without any changes as well. I have not cleaned the air intake but I have removed the hose right off the plenum and it did not change anything. I have never checked the vacuum. I looked through the service manual and it does not give vacuum specs.

I appreciate all the ideas @10mm_

I am ready to just ride it, I just wanted to make sure I am not missing something. I am an "old" auto tech (now in healthcare ) but even in the early 2000s when I left the industry the computers were more robust. FI without much help from the computer is frustrating.

 

From listening to the video it dosen't really sound that bad.

I'm sure even though not mentioned, did you check voltage at idle and load test on the battery?
Sometimes ground wires can go bad, so I always suggest to run continuity on as many main wires as you can.

 

Ya the voltage when running is always above 14V, I have not load tested that battery, should I? I like the idea of continuity testing more ground wires (when I bought the unit I felt like it was a ground issue), I will try that when I decide to tear it down again.

If you changed the components that meter the air and you don't have any vacuum leaks I'm willing to bet that's just how it idles. Could be wear on the cam lobes, or a million other things as you said.

If you can find a similar machine or if someone on here will do it I would still compare the vacuum, but if it runs good it's probably just time to rip it and not pay attention to the idle lol.

I love that!! I just wanted to make sure I did not leave any stone untouched. Time to get it back out and tear up some ground!! Thank you all for the suggestions I really appreciate the help.