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Old 02-03-2014, 01:01 AM   #11
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Dude! I been F.......with this ztec 01' motor for too long and in hopes somebody cool was on this site, ...anyway, Thanks , I was pretty sure you could give the ecm the range it needs, and now I can go for it!
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Old 03-16-2014, 12:08 PM   #12
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Anyone out there have advice on a 2001 focus zetec that floods after warm up? TPS finally right but still runs wrong.....:-/
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Old 07-08-2014, 09:42 AM   #13
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Thanks for posting this up amc49. You saved me a lot of time and hassle working on my son's car!
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Old 07-10-2014, 07:34 PM   #14
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Luck.............
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Old 05-11-2015, 10:33 AM   #15
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Not to sound ungrateful, this is a very helpful mod, but there are several things I am just not understanding:

If the mechanicals for the ATX TPS and the MTX TPS are the same - just internally clocked differently, why don't the parts companies sell an ATX TPS? It seems like there are probably more ATX Focuses in the world having the failure.

EDIT: After more research, I can probably answer this myself now.
  • Pre-2003, MTX and ATX used the same TPS Connector plug, but part was clocked differently. Not a good idea as you can't look at the parts and tell what you have, and you could install the MTX on an ATX car or vice-versa and not know why it didn't work.
  • 2003, the ATX got a different connector, but the MTX was the same.
  • Makes sense to continue making the MTX part as it can be used before or after 2003.
  • However, it doesn't make sense to continue making the 2000-2002 part as those are the only years that use it. Solution is either to modify the MTX part as above, or modify the ATX harness (maybe) and use the newer ATX TPS.




I'm having a hard time getting my head around how this mod works. You said earlier the mod provided 360-degrees of rotation. 4doorFRRIBTR who did the mod and posted the pictures said he had 15-20 degrees of rotation.

Looking at the picture it looks like the mod didn't change anything except the TPS is bolted down from the top instead of the bottom.

I don't see really how there is any play in the TPS except maybe 5-degrees before the connector hits the washer.

I could see if the washer were ground with the flat closer to the center (say even with the bottom of the inner hole), you could get close to 120-degress of rotation.

Or if the holes in the washer were slotted, but that would be hard to plan and do in a home shop ...

What am I missing?

Last edited by Tiger-Heli; 05-11-2015 at 12:29 PM.
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Old 05-11-2015, 11:59 AM   #16
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Also - doing some digging on RockAuto ...

I can get a TPS for a 2003 ATX for $34.79. The connector is different, but seems to be the same pin type and shape, just a different shield shape and the 2003 connector is $17.61.

Wouldn't it be an easier (although more expensive) repair to just de-pin and re-pin the two connectors, or worst case, cut and splice the 2003 connector into the 2002 harness?

EDIT - From the other thread, 2003 TPS needs 2003 TB and connector, so no, this won't work.

Last edited by Tiger-Heli; 05-11-2015 at 04:38 PM.
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Old 05-14-2015, 12:12 AM   #17
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That pic is not mine, mine HAD the washer flat cut more toward the center to have some swing. By 360 degrees I meant the outside case with the screw bosses cut off. It helps to clarify understanding that the outer body can twist some. It actually does NOT swing the full 360, the bolts get in the way. All it needs to swing is maybe 15 degrees max.

Say the TPS, either one, has a clock swing of 20 degrees. One though, begins at 12:00 straight up and the other begins at 1:00. Remove the screw tabs and then both TPS become the same part.

Look at aftermarket TBs, they have multiple TPS bolt-on patterns, including slightly different ones for ATX and MTX. That is what convinced me the idea would work. Mine still runs fine. The TPS case DOES move slightly, enough that the existent bolt holes no longer work. Slotting holes would work but not enough material left to be dependable in my view. The pic there shows that the switch case has been moved slightly CCW, his washer is becoming the limiting factor there, mine had more room to rotate but not needed. It doesn't take much, enough that it is hard to see it but the engine and trans sure do.
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Old 05-14-2015, 06:32 AM   #18
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Quote:
Originally Posted by amc49 View Post
That pic is not mine, mine HAD the washer flat cut more toward the center to have some swing. By 360 degrees I meant the outside case with the screw bosses cut off. It helps to clarify understanding that the outer body can twist some. It actually does NOT swing the full 360, the bolts get in the way. All it needs to swing is maybe 15 degrees max.
Makes sense to me now!!!

Quote:
Look at aftermarket TBs, they have multiple TPS bolt-on patterns, including slightly different ones for ATX and MTX.
My Google-image-fu failed me, but I'll take your word on this and I found some other text references to this.

Quote:
The TPS case DOES move slightly, enough that the existent bolt holes no longer work.
You lost me here. The existing bolt holes in the washer no longer work? The existing bolt holes in the TB no longer work? (If the latter, what is holding it on now?)

Thanks again!
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Old 05-14-2015, 10:27 AM   #19
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I think amc's meaning is that the different types of TPS move the holes a bit (clocked differently) just enough that slotting the holes wouldn't work as a way to adapt the different units.
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Old 05-14-2015, 10:34 AM   #20
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Okay, I've got it now.

I was talking earlier about slotting the holes on the washer and thought amc49 was referring to that. I also thought amc49 meant that the throttle body holes on his car were no longer working.

Re-reading it again carefully, amc49 (I think) is saying that it would work to slot the holes on the TPS to align it, but not enough material left for the screws to hold it, so he came up with the idea of cutting the bolt holes off and using the washer.

Makes sense now.
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