I have lost the plastic cover to the dash pot, is there a place to order a new one? What would be the side effects of missing the round plastic cover?Originally Posted by timsrv
I have lost the plastic cover to the dash pot, is there a place to order a new one? What would be the side effects of missing the round plastic cover?
awesome write up! i may inspect my throttle body etc as I imagine it could use this cleaning. have you ever seen one of these (the "intake snake")? is it worth $50? seems like if it worked it would save a lot of time and effort.
They should have a link to an instructional video. Maybe I don't have much of an imagination, but I fail to see how that could aid in cleaning the throttle body. Tim
Upon disassembling the entire intake side of my engine to essentially just clean 30 years of gunk and fix a minor water leak on the bypass pipe No.2, I'm having issues with my throttle position sensor and my distributor advancing mechanism.
Issue 1) When fully throttled my engine cuts out, and when I back off power returns and I take off. The cut out only occurs at the end of the throttle's.
Issue2) The Idle was factory spec upon the beginning of my project, but now after reassembly I find the idle low upon warming up and high after warm up. I did not mess with my distributor but I did change the cap and rotor. To correct the high idle I turned in the screw on the throttle body that controls the idle, but I feel like the timing may still be advancing when it shouldn't.
Maybe a vacuum hose is cracked or loose since the 1984 Ignition timing advance is not electronic and maybe the advance diaphragm could be damaged or faulty. I do not believe that the throttle position sensor has much or any influence on the timing advance since if memory serves the ECU does not monitor any sensory input from the ignition.
The second generation Vans 86-89 diagnostics is more robust and does incorporate into the ECU, ESA which is electronic Spark Advance which monitors sensory input from the throttle position sensor, igniter,coolant 02 etc.
If I remember the 84 Van has something like 6 DTC codes while the 89 Van has like 14 or 15.
I would say replace your TPS first to resolve the hesitation or cut that you experience on full throttle if you cannot determine how old the current TPS is.
When you took apart the intake it is more likely you may have disturbed a wire in the connector or wiring harness to the TPS as the insulation on the wires cracks very easily especially in the environment these engines are in plus being 33 years old. Also in this vicinity is the auxiliary air valve for cold starts. if the connector or wiring is damaged , you will get inconsistent idle because the auxiliary valve even though is designed for giving you fast idle at cold starts it is working all of the time to adjust idle. If you are getting high idle when the engine is warm the bimetal switch in the valve will stay at whatever position it was in when the connector plug or wire broke or the connector was loose. My guess is that your auxiliary valve is intermittently making a connection producing inconsistent idle. I had this experience on my 1985 Van which took along time to track down as the check engine light never came on. I don't think I ever saw a check engine light in my 85 with the exception of a bad 02 sensor but that was it
Hey Tim,
Don't know if you're aware already but Warner Music Group/Youtube have blocked your video regarding this topic... I'm hoping to adjust my TPS and would love to access that video, anywhere else we can find it? or anywhere I can find a written step by step adjustment instruction? Thanks in advance.
Really? Because there was Pat Benatar randomly playing on the radio in the background??? That's the only thing it could be. I've been against the music industry since Napster but that's real petty even by their standards, hopefully this can be cleared up easily enough, if not then someone is going to have to either remake the video or scrub the audio from the original and overdub it.
I have my TB dismounted and ready to make adjustments to TPS. If I figure out how to properly set it I will record the process and play 'Strauss' 'Also Sprach Zarathustra' royalty free version in the background to ensure no interruptions.
Wow, you're right, that's petty. They wiped out all my chihuahua puppy videos too because of the same thing (30 year old music quietly playing in the background). On one 3 minute vid there was "Gray's Anatomy" TV show playing in the background (couldn't even see the tv screen in the video) and they took it down for copyright violations as well. You'd think I did something really bad (like say something positive about Trump)........jeeze.
I'll eventually redo that, but it will have to wait until I do that job again. Not sure when that will be. Video isn't really necessary though. The manual lays it out and with the written instructions here it should be a cake walk. Tim
The Manual says if you can't find continuity in the specified range replace the TPS and the throttle body as a set... say what??? Mine I rotated for the magic continuity spot at .57mm and was not continuous at .80mm (manuel specs .85mm). Going to install tomorrow and clear codes... Hope it goes well...
The only thing I might add is to ignore the stuff in the manual about continuity at different angles of throttle rotation. Even if you had a good way to check that, there's nothing you could do about it if it were off anyway. If the TPS has more than 100k miles on it don't even mess around trying to make it work. Just get a new one and set it with the feeler gauge in the throttle stop. You're done.
As I've said before, these TPS's are a common failed part and they seldom last over 150k miles. I would almost consider their replacement as routine maintenance. On the other hand, about the only thing that justifies throttle body replacement is a coolant leak from it's nipples (corrosion) and/or maybe wear on the throttle shaft bore. Personally I've only had to change them due to corroded coolant nipples. Tim
Yeah, I bought an AC Delco of Rock Auto... Here is a picture of the inside of my original TPS
Update: I reinstalled Throttle body and hooked everything up. Still getting code 2 and 11... Van hesitating perfusely. Not drivable. Could the MAF be shot?
Hey Tim:
I am ready to replace my TPS and found your video instruction not on you tube any more.Where can I get that, it was really good. I knew I would use it when I was ready and now I am ready and NO VIDEO.
MT
They took it down due to the music in the background. Some stupid copyright BS (like some 80's artist will starve to death now because of me). The video is pointless without sound, so I need to do it again with no background music. I plan on doing so next time I do this job, but don't have any immediate plans to do so. Sorry. Tim
What? OMG, what a joke. I am sorry to have bothered you on this. I know what it takes to do this and the very reason why I was so grateful knowing that it was there for reference.
I could not find any other detailed instruction onTVT. If you know of any let me know Other wise I will go back to the Service Manual.
Hmmm... maybe for something like this we could send you a blank zip-drive and a self-addressed stamped envelope and you could send the original video (with music) to the party in desperate need ?
Probably wouldn't come up often, right ??
Okay, I had recorded two of these (same day back in 2011). I just uploaded the other one and updated the tag (bottom of post #1 of this thread). There's still music in it so it will probably be removed, but it's working now. Download it and save it quick before the music police find out. Tim
Thanks Tim!!!
Got it recorded. Anyone need it give a scream. Hmmm now I hate the song.
MT
I ripped it as well. Hell, I even splurged and downloaded the "high quality" version of it, which clocked in just under 16MB, so I think it's small enough to send as an email attachment for any members here who will need it after youtube inevitably pulls it again. Otherwise, I can throw it in a .zip file and put it on a file sharing site if the demand is there.
Also, a previous post I made in this thread mistakenly cited Pat Benatar as the artist whose music messed this all up in the first place (I swear one of her songs is playing in another of Tim's videos). AD2101 regrets the error.
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