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Old 03-13-2010, 09:58 AM   #1
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Default can i use a 1.8 throttle body with no issues?

i'm swapping a 1.8 into my 93. i tried to install the throttle body adapter last night, and screwed it up.


will i have any issues if i just buy a 1.8 throttle body and use that?
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Old 03-13-2010, 12:09 PM   #2
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The issue is the TPS sensor, the 1.6 used an on/off tps while the 1.8 used a potentiometer. If you are using a 1.6 harness and ecu you need the on/off type tps. Either adapt the 1.6 tps to the 1.8 throttle body or switch to a 1.8 harness and ecu, or go with a megasquirt.
I've got my old 1.6 throttlebody and spacer I made lying around if you need one, it's not pretty but it worked.
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Old 03-13-2010, 12:42 PM   #3
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I have a braineack MS to install after the swap is done. Will the 1.6 tps bolt right onto the 1.8 throttle body?
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Old 03-13-2010, 12:50 PM   #4
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Quote:
Originally Posted by Fidgitk
I've got my old 1.6 throttlebody and spacer I made lying around if you need one, it's not pretty but it worked.


The problem I'm having with the TB spacer is that I drilled the holes in the intake mani, and when I tried to tap them I just wallered out the holes and dicked them up.

I don't really know what to do... Unfortunately I make up for my lack of mechanical skill most of the time by throwing money at my problems
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Old 03-13-2010, 12:53 PM   #5
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No you would need to figure out someway to adapt it.
Is the braineack MS setup for a 1.6 or a 1.8?
On the MSPNP the 1.6 tps isn't even used, I'm not sure if brain sets his up that way or not. You need to confirm with him what your MS needs to see as far as TPS signals. If it doesn't use a tps signal just install the 1.8 tb and leave the tps unplugged, if it does use a tps signal then install the 1.8 tb and get a 1.8 tps pigtail and wire it into your harness.
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Old 03-13-2010, 12:55 PM   #6
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On mine I ended up drilling the throttle body to match the 1.8 flange, I'm trying to remember why I made the spacer. I think it had to do with the idle valve.
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Old 03-13-2010, 02:04 PM   #7
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Is there any reason why I couldn't weld the adapter to the intake manifold?
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Old 03-13-2010, 02:13 PM   #8
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Skip the adapter and bolt up the 1.8 tbody. With the MS ECU, you actually don't need either the TPS or IAC valve--however if you locate the proper 1.8 connector pigtails, then you can go ahead and use them.
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Old 03-13-2010, 02:14 PM   #9
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Forget about the TPS. Just install the 1.8 TB directly with no modifications.

Your ECU can run without TPS for now. When you go MS, then worry about it.


Edit: Beaten to the point by 15 seconds...
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Old 03-13-2010, 02:42 PM   #10
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Quote:
Originally Posted by Joe Perez View Post
Forget about the TPS. Just install the 1.8 TB directly with no modifications.

Your ECU can run without TPS for now. When you go MS, then worry about it.


Edit: Beaten to the point by 15 seconds...
So I could install a 1.8 TB, start the car and make sure it runs on the stock ecu. Then install my MS with no issues?
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Old 03-13-2010, 02:46 PM   #11
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Yes.
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Old 03-13-2010, 03:08 PM   #12
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It may not idle on the stock ECU with the throttle closed without a working TPS and idle valve. Open up the idle bypass screw and set for a high-ish idle.
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Old 03-13-2010, 05:28 PM   #13
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I tried it years ago when I had a stock ECU. There was a minor difference in idle stability, but it worked.
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Old 03-13-2010, 05:49 PM   #14
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Quote:
Originally Posted by Joe Perez View Post
I tried it years ago when I had a stock ECU. There was a minor difference in idle stability, but it worked.
so the car will start up and idle, will it drive?
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Old 10-16-2013, 10:10 PM   #15
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Hey guys, bumping an old thread in favor of making a new one.

I've done a '99/'00 swap into my '93 and am finishing it up tomorrow.
How doable is it to run (and drive) the car without TPS and Idle control valve?

I do have a FM adapter to bolt on my 1.6 tb, but I'd rather not.
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