Need Part #’s for Temp Sender & Throttle Shaft Bushings

Need Part #’s for Temp Sender & Throttle Shaft Bushings

Postby Left Coast Resident [OP] » March 28th 2020, 11:43pm

I used the search function to no avail.

For a 1995 Astro. Can anybody help me with part #’s for the coolant temp sender (gauge, NOT ECU), and the throttle shaft bushings/seals?

Located in the driver’s side head, rear, not the one by the thermostat housing up front. ALDL and IR thermometer read 195°, gauge reads 160°. I want to order one from Rock Auto, but unless I’m missing something there, it is pretty much impossible for me to tell if I am looking at the ECU or the gauge senders on their webpage.

Does anybody have any part #’s (or know where I can order one) for a bushing (and I presume there is a seal on each bushing) kit for the throttle body butterfly shaft on this same 1995 Astro? Bear in mind that this is an ORPHAN year engine – 1994 and earlier have a removable throttle body, 1996 and later have a much different removable throttle body, 1995 (ONLY!) has the throttle body cast into the upper plenum cover. I put my Smoke Wizard on the intake and HVAC systems to look for vacuum leaks prior to a smog test, and I have a slight vacuum leak out both sides of the throttle shaft.

Thanks for your help!
Al
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Re: Need Part #’s for Temp Sender & Throttle Shaft Bushings

Postby Big_kid » March 29th 2020, 12:29am

I had such a hard time finding that sensor I ended up scouring pick n pull for one. The very last potential donor had one. (I broke mine during the engine swap).

I may still have my upper intake in the shed, I'll take a look.
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Re: Need Part #’s for Temp Sender & Throttle Shaft Bushings

Postby Big_kid » March 29th 2020, 12:36am

I wanted to hold the upper intake in my hand before I said I had it. I have it. If you need it, let me know.
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Re: Need Part #’s for Temp Sender & Throttle Shaft Bushings

Postby M_a_t_t » March 29th 2020, 12:38am

The sendor in my driver side head was a single pin. The one in the intake is a 2 wire. Thats how you can tell the difference between them.

I think I ended up using getting a used one as well.

No idea on the shaft seals.

Are you sure on the only year? 94 had tbi and the spider (CPFI? I think, don't remember the acronym) as an option.
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59778

BigKid:
What are you looking for yours for? A part number? Mine is in the garage on a stand so if you can't find yours I can check mine.

NVM. He responded before I submitted my reply
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Re: Need Part #’s for Temp Sender & Throttle Shaft Bushings

Postby Big_kid » March 29th 2020, 12:56am

Central Port Fuel Injection. That pic is the same as the one in my shed. They're not super rare, but they are 25 years old and out of production.
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Re: Need Part #’s for Temp Sender & Throttle Shaft Bushings

Postby Left Coast Resident [OP] » March 29th 2020, 1:07am

Big_kid wrote:I wanted to hold the upper intake in my hand before I said I had it. I have it. If you need it, let me know.

Are you offering to sell it and ship it? If so, what condition is it in? I would have to be sure that there were no leaks, however small. I know mine has small leaks at the shaft bushings because as I indicated, I smoked it. Foolproof way of finding stubborn and weird problems.

I was led to looking for a vacuum leak by the smog guy, who pre-sniffs everything before putting the cars on the rollers for the test. HC at idle only was high, his comment was, "Go home and look for a vacuum leak at idle that becomes completely negligible at cruise. Look also at the PCV valve."

Did that, passed smog, PCV valve was another story (I'll post that elsewhere).


M_a_t_t wrote:The sendor in my driver side head was a single pin. The one in the intake is a 2 wire. Thats how you can tell the difference between them.

<SNIP>

Are you sure on the only year? 94 had tbi and the spider (CPFI? I think, don't remember the acronym) as an option.
Here is a pic of Mikes (sixsix) 92
59778

<SNIP>


Rock Auto and other sources show '94 and back as having a 3 bolt base gasket for the throttle body. Years back when I bought the van it was pointed out to me that the '95 was referred to as 'speed density' and was a one-off year. Even back in the late 90's I could go to the dealership, tell them what I wanted in the air cleaner path and have them tell me that what I had didn't exist. They even let me look at the display system on their side of the counter. You can't make this shiett up . . .

I was hoping someone had the sender part # / terminal configuration, but if not I'll take the dog house cover off and check the terminal end of the head sender.
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Re: Need Part #’s for Temp Sender & Throttle Shaft Bushings

Postby M_a_t_t » March 29th 2020, 3:07am

Left Coast Resident wrote:Rock Auto and other sources show '94 and back as having a 3 bolt base gasket for the throttle body. Years back when I bought the van it was pointed out to me that the '95 was referred to as 'speed density' and was a one-off year. Even back in the late 90's I could go to the dealership, tell them what I wanted in the air cleaner path and have them tell me that what I had didn't exist. They even let me look at the display system on their side of the counter. You can't make this shiett up . . .

I was hoping someone had the sender part # / terminal configuration, but if not I'll take the dog house cover off and check the terminal end of the head sender.


That base gasket is for the tbi. Unless they used the same setup for both, which I suppose is possible. Dealer computer and Autozone computers are different levels, but the one at Autozone is definitely not accurate more often than you might think.

That base gasket matches the tbi for the trucks and full size vans which came with tbi, Rockauto also lists that as tbi only. The tbi from the 5.7 and 4.3 are the same except for larger injectors. I don't have a 94 or earlier, so I can't verify. Only reporting what I find. I do know that the 94 5.7 that I put in my van was tbi and used that gasket.
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Re: Need Part #’s for Temp Sender & Throttle Shaft Bushings

Postby Big_kid » March 29th 2020, 4:18am

I'll ship it if you need it, I'm not sure how I'd check the bushings though. I didn't notice any wiggle in the shaft this afternoon, but it does have a spring on it that could mask any play. The engine had 178K or so when I pulled it.

Took me a minute or two to find, but I knew I bookmarked it when I went through all this in my swap. The description specifically says it's a single male pin within the female plug.

https://www.autozone.com/engine-managem ... ?counter=0

I also found this in my searches:

https://www.gmtruckclub.com/threads/1-p ... und.53424/

Posted by murdog94

"Not trying to sound rude here but for reference on the 350TBI the "coolant temp sensor" is mounted up by the thermostat housing with a dual wire connector(which is for the PCM to read the engine temp to allow the right fuel mixture), and the "temp switch" is mounted between the number 1&3cyl on the drivers side head with a single wire (this runs your guage cluster)
Also how poor is your milage, i have owned several of these trucks (2 1994s and a bunch of other years from 1988-1994) i never got more than 15mpg on the highway with them on a regular basis sometimes the stars would align and id get 17, as to the city milage i dunno cuz it sucked that bad i didnt even want to look. But if your milage is bad and your coolant is truly at 160degrees then you will want to look at the Thermostat and replace it with a factory 195 unit to get everything right, and possibly consider a tuneup since the cap and rotor even on the TBI motors werent the best and lasted me usually a year or two before needing replaced."
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Re: Need Part #’s for Temp Sender & Throttle Shaft Bushings

Postby Left Coast Resident [OP] » March 29th 2020, 4:55am

Thanks Big Kid,
RE the sender, I cross referenced the Auto Zone TU152 ($23.99) to WVE 1T1048 ($9.93) at Rock Auto. I'll pull the dog house and have an actual look at it to verify before I order one.

On the fence about getting another upper plenum / throttle body because if it smokes I'm right where I am now, if I'm R&R'ing the part, I might as well rebuild what I have. Just need to find the right bushings / seals. Not the first thing I needed this week that was made out of unobtainium. Did you know that stock HEI distributor advance weight bushings no longer exist???
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Re: Need Part #’s for Temp Sender & Throttle Shaft Bushings

Postby Big_kid » March 29th 2020, 3:23pm

I'm not sure if I still have those or not, I probably do. I replaced my distributor immediately before blowing the engine, so I used the old distributor to make an oil pump primer. The weights are probably still in it, but I can't say for sure. I think I took a hammer (and some frustration) to the reluctor ring.
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Re: Need Part #’s for Temp Sender & Throttle Shaft Bushings

Postby sixsix » March 29th 2020, 8:15pm

M_a_t_t wrote:... Here is a pic of Mikes (sixsix) 92
59778

Well... since I was quoted and blah, blah - thought I would chime in.
Yup, that's the CPI intake - but it is NOT the 'Temp Sender or Sensor' ( not that it was implied - just want to curb any confusion ).
That is the IAC unit circled that I was replacing.

Though I would include a few Reference pics:

4.3 Temp sndr - snsr.jpg
4.3 Temp sndr - snsr.jpg
When I read the first post this morning, I did a quick search and found this 'set' a couple down on G00gle - 'Shopping'.
By the way - it did not help my fast idle situation, nor did the Temp Sensor. Nor did replacing all Vacuum hoses/lines and related valves, etc. Glad you finally got the right one - it had me going for a while.

Image
1076 New Distr-Out of there
Here is the rear of the " CPI " Intake with Distributor being replaced.


Image
1044 Cool Temp Sensor-ECM
Took 4 times longer to get to it than to change it out. And that includes dumping the little bit of water that popped out.


Image
1043 Cool Temp Sender-Gauge
I thought all the time that this (1) Wire Temp Sender was between the 3 and 5 cyl, but I could be wrong.
I always thought the #1 was up front, first one, driver's side.


Sooooo much time... what to do?
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.
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Re: Need Part #’s for Temp Sender & Throttle Shaft Bushings

Postby markmitch » March 30th 2020, 12:25am

On my 91 350 the sensor in the intake is the only one I have hooked up , the one of the cylinder head broke so I just never fixed it and I do not have any codes popping up. I have driven my van some and I also let it run for close to an hour while adjusting timing and check to see if my efan comes on.
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Re: Need Part #’s for Temp Sender & Throttle Shaft Bushings

Postby Left Coast Resident [OP] » April 1st 2020, 5:04am

Apparently I stand corrected -- the one piece plenum/throttle body was '92-'95, not '95 only. I found one on eBay, NOS, and I bought it. That should be the end of the small vacuum leak out the butterfly shaft ends. Plus, oh lucky me, I get to have a look inside there when I install it. It will be interesting to see if there are any other problems lurking in there.
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Re: Need Part #’s for Temp Sender & Throttle Shaft Bushings

Postby MechBob » April 1st 2020, 6:51am

I will bet money that little bit of "smoke leak" is not your problem, the shafts are not sealed.But, while you are replacing it, replace the electrical injector connector.
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Re: Need Part #’s for Temp Sender & Throttle Shaft Bushings

Postby Leeann_93 » April 1st 2020, 4:44pm

Yep, what Bob suggests. That connector is the cause of major pain on almost every CPI engine made.
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Re: Need Part #’s for Temp Sender & Throttle Shaft Bushings

Postby Left Coast Resident [OP] » April 5th 2020, 6:09am

Thanks for all the advice.

Hopefully there are two pins on the fuel injection connector that is referred to? I ordered the one on Rock Auto corresponding to 'fuel injection connector'; it's 2 wires, one seems to be pink, one seems to be blue.

The temp sender in the rear of the driver's side head is just below the knock sensor and is one wire with a two pin connector that goes on a two pin sensor. It matches what I ordered at Rock, i.e. a two position connector with only one wire installed in it.

The upper plenum I bought looks great; it's definitely NOS, complete with MAP, IAC, and the butterfly valve in the middle of the top (can't think of the name of it) that is supposed to change runner length at 3K rpm's or so.

I hope to open up the intake in a few days when the other parts I just ordered arrive. Frankly, I'm scared of how many things I'll find that I don't like, as I usually don't have the time nor inclination to do my own work, and let the 'garage du jour' do the job. Some things they've repaired I would never have attempted, other things I've become unhappy about.

But now, with the slowdown in the economy, social distancing and such, I have more time and less places to go. My gasoline purchases have certainly decreased.
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Re: Need Part #’s for Temp Sender & Throttle Shaft Bushings

Postby Leeann_93 » April 5th 2020, 3:46pm

Left Coast Resident wrote:Thanks for all the advice.

Hopefully there are two pins on the fuel injection connector that is referred to? I ordered the one on Rock Auto corresponding to 'fuel injection connector'; it's 2 wires, one seems to be pink, one seems to be blue.

The temp sender in the rear of the driver's side head is just below the knock sensor and is one wire with a two pin connector that goes on a two pin sensor. It matches what I ordered at Rock, i.e. a two position connector with only one wire installed in it.

The upper plenum I bought looks great; it's definitely NOS, complete with MAP, IAC, and the butterfly valve in the middle of the top (can't think of the name of it) that is supposed to change runner length at 3K rpm's or so.

I hope to open up the intake in a few days when the other parts I just ordered arrive. Frankly, I'm scared of how many things I'll find that I don't like, as I usually don't have the time nor inclination to do my own work, and let the 'garage du jour' do the job. Some things they've repaired I would never have attempted, other things I've become unhappy about.

But now, with the slowdown in the economy, social distancing and such, I have more time and less places to go. My gasoline purchases have certainly decreased.



That is the correct fuel injector connector.

The butterfly thing (I usually call it the hockey puck thing) is the IMTV, aka Intake Manifold Tuning Valve.
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Re: Need Part #’s for Temp Sender & Throttle Shaft Bushings

Postby sixsix » April 5th 2020, 3:55pm

Well, just happened to have "The Big Book of Confusing Wire Colors" aka Wiring Diagrams hanging around while chasing Moles.

Left Coast Resident wrote:Thanks for all the advice.

Hopefully there are two pins on the fuel injection connector that is referred to? I ordered the one on Rock Auto corresponding to 'fuel injection connector'; it's 2 wires, one seems to be pink, one seems to be blue.
My manual says you are right, PINK/ BLK and DK BLU

The temp sender in the rear of the driver's side head is just below the knock sensor and is one wire with a two pin connector that goes on a two pin sensor. It matches what I ordered at Rock, i.e. a two position connector with only one wire installed in it.
Yeah, our photo was not the best, It is a small 3/8" sq. w/ the one wire only. I wonder how the 2 pos/pin will work out...

The upper plenum I bought looks great; it's definitely NOS, complete with MAP, IAC, and the butterfly valve in the middle of the top (can't think of the name of it) that is supposed to change runner length at 3K rpm's or so.
That would be the "Variable Tuning Control" Electric Motor - also has (2) wires.

I hope to open up the intake in a few days when the other parts I just ordered arrive. Frankly, I'm scared of how many things I'll find that I don't like, as I usually don't have the time nor inclination to do my own work, and let the 'garage du jour' do the job. Some things they've repaired I would never have attempted, other things I've become unhappy about.

But now, with the slowdown in the economy, social distancing and such, I have more time and less places to go. My gasoline purchases have certainly decreased.



The TBI intake / Upper Manifold work is highly covered on this site/forum. Unfortunately, not very many of us are talking about the CPI / "HP" version. I do not know the percentages, but I can not remember the last time anyone "popped the top" on this Fuel Injection.
I helped do ours 'way back when' and it was not a hard job for any kind of mechanic, just VERY inconvenient having to work into 2 different locations, inside, then around the door to under the hood, blah, blah.

Good Luck to you, either way you go.


Oh, and to BK, is the Temp Sender in the head, in a diff. spot, V6 to V8? - sorry if I was confusing those two.

didn't even notice Leeann was here - I need to pay more attention LOL.
.

Well, after all... what would Banacek say ?... “It is only a matter of time before armed citizens, waiting or not for the police, take things into their own hands, fire on the rioters for personal and property prot. & end up hunted like dogs.”

.
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Re: Need Part #’s for Temp Sender & Throttle Shaft Bushings

Postby Big_kid » April 5th 2020, 5:35pm

The V6 & V8 both typically have them in the driver side head. I'm not 100% sure which cylinders they're in between on which engine, but it's the only port on the side of the head. I suppose if someone were determined they could put it in the passenger side. Some folks seem to like making more work and potential points of failure to things.

IIRC the 2 pin plug will fit the 1 pin switch/sensor, just be sure to use the correct wire. I would cut the unused wire off to be sure.
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Re: Need Part #’s for Temp Sender & Throttle Shaft Bushings

Postby Leeann_93 » April 5th 2020, 6:01pm

On my '93 Bravada, there's one in the passenger head and one by the thermostat housing. I don't remember looking on the '93 Astro, but I assume it's the same.

On the '99 and up, it's on the driver's head (and by the t-stat housing on the '99, as well - '00+ only has the one).
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