First Gen General Questions

First Gen General Questions

Postby Slime [OP] » November 24th 2020, 11:18pm

Well, as I'm assembling my project I'm finding out what is and is not here. First thing I realized was I have no coil or the mount. Can somebody show me a picture of where that is located on a 1989 4.3? Also, I know one leg of this is broken and it bolts to the intake manifold but what does it do? Guess I'm going to the junk yard soon.
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Re: First Gen General Questions

Postby AstroWill » November 25th 2020, 12:32am

LOL, that is one way to remove it ;)

Youtube has a bunch of videos of that part under coil replacement.

I probably have a picture floating around here somewhere, will have to look.

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Re: First Gen General Questions

Postby Slime [OP] » November 25th 2020, 6:52pm

So, I take it this is the coil mount too?
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Re: First Gen General Questions

Postby markmitch » November 25th 2020, 7:02pm

no the coil from the factory is mounted with its own bracket. it sits right behind the throttle body assembly. The item you showed is for the map sensor and another sensor I can't find the name of. The bracket has been cut so grab the bracket from another 4.3 in the junk yard. My advice is find another Astro the same year and engine and take a few pictures to guide you. Anytime I work on another vehicle I am not familiar with I take pictures prior to starting and store them on an external hard drive for future reference.
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Re: First Gen General Questions

Postby 90safari » November 25th 2020, 8:46pm

markmitch wrote:no the coil from the factory is mounted with its own bracket. it sits right behind the throttle body assembly. The item you showed is for the map sensor and another sensor I can't find the name of. The bracket has been cut so grab the bracket from another 4.3 in the junk yard. My advice is find another Astro the same year and engine and take a few pictures to guide you. Anytime I work on another vehicle I am not familiar with I take pictures prior to starting and store them on an external hard drive for future reference.


That bracket holds the ESC module (at the top with the exposed terminals) and the map sensor (on the bottom). Here's a crappy pic of it (and location) on my 88 Astro. Sorry about the mess, but I was getting ready to pull the engine, and didn't have a better pic (I looked).
Image
It's located just forward and to the right of the distributor.
This part assembly was used from 1986 thru 92, maybe thru 95 on the TBI engines, and also could be found on S-10's and S-15's with TBI.
I hope this helps.
Note, it's actually located just in front of the coil, and is under that wire cluster mess. It gets bolted to the intake manifold stud and a bolt hole in the manifold, which is probably why yours was trimmed off.
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Re: First Gen General Questions

Postby Leeann_93 » November 26th 2020, 12:39am

This is on my '93 Bravada, so the pic is taken from the front. You can see the coil and bracket on the left.
IMG_0245.JPG


Slightly closer, but right on the edge on this pic:
IMG_0247.JPG


And, with the upper plenum removed, you can see the bracket mounting a little better
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Re: First Gen General Questions

Postby Slime [OP] » November 30th 2020, 10:22pm

Thanks. I need to make a trip to the junk yard soon..
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Re: First Gen General Questions

Postby icebrrg3rd » December 1st 2020, 12:20am

Hmmm, that's interesting. One of my sensors is mounted on a bracket by itself on the back of the head,

2020-11-20_CloseUp01.jpg


the other is next to the TBI on a bracket with a different sensor.

2020-11-20_CloseUp02.jpg


This is a '91 TBI ("Z" motor). Yeah, I swapped in a V-8 but I used the original V-6 sensors and brackets in the original locations.

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Re: First Gen General Questions

Postby Slime [OP] » December 6th 2020, 6:14pm

So, can anybody post a picture of the actual coil and it's mount? I went to Pull-A-Part yesterday only to get the wrong part. This was off a 4.3 ZR-2 S-10. Anybody need this?
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Re: First Gen General Questions

Postby Leeann_93 » December 6th 2020, 6:15pm

That's a second gen coil, ICM and bracket.

Taken on an angle, but this is the passenger side of the manifold and head:
IMG_0853.JPG


And a wider view of the whole replacement engine in the back of my '93, where you can see the ICM is part of the distributor on a Gen 1:
IMG_0858.JPG
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Re: First Gen General Questions

Postby Slime [OP] » December 6th 2020, 6:56pm

Thanks.
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Re: First Gen General Questions

Postby icebrrg3rd » December 10th 2020, 12:04am

Best pic I have is for my '91, I guess I've never really took one of just the coil and/or mount.

2014-05-16_CoilCloseup.jpg


Mine is mounted between the dizzy and the TBI. Ignore the breather hose that looks like it's attached to it. Two black plugs on one side, and a tower on the other for the plug wire (to dizzy center).

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Re: First Gen General Questions

Postby Mmusicman » December 10th 2020, 1:53am

Here's what my 92 used to look like... lol

IMG_5396-EngineV6-1200.jpg


IMG_5398-V6-1200.jpg
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Re: First Gen General Questions

Postby Leeann_93 » December 10th 2020, 2:02am

So is the Astro bracket different from the Blazer/Jimmy/Bravada mount? The pics I posted were from my '93 Bravada and the replacement engine for my '93 Astro, but it came from a '94 Blazer.

Or is it different TBI to CPI?
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Re: First Gen General Questions

Postby markmitch » December 10th 2020, 3:38am

Just to clarify he said his is an 89 so he has a TBI engine not CPI. I will take a picture of mine tomorrow , yes I have a 350 but all the brackets are from my original TBI 4.3.
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Re: First Gen General Questions

Postby Slime [OP] » December 19th 2020, 5:59pm

Slime wrote:Well, as I'm assembling my project I'm finding out what is and is not here. First thing I realized was I have no coil or the mount. Can somebody show me a picture of where that is located on a 1989 4.3? Also, I know one leg of this is broken and it bolts to the intake manifold but what does it do? Guess I'm going to the junk yard soon.

So, I found the piece that has broken of this bracket. Is it possible that the missing piece attaches at a 90 degree angle? I do have an aftermarket intake manifold, but I don't really see a way that it fits like that.
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Re: First Gen General Questions

Postby markmitch » December 19th 2020, 8:20pm

h=go to a hardware store or home depot grab some steel stock it comes in many sizes and make a bracket to mount it. Just drill the holes in the broken bracket and bolt the home made part to the existing bracket.
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