TPS heat drift

[Sgt Gus]

Okay, so having high idle after warm up.
After using winaldl and checking base mechanical idle, iac reset, iac reset and ck base idle...
TPS goes from .59 volts (multimeter) and winaldl to .76 area after warm/hot.
CTS gets to 176-178°, which coensides with Lazer temperature Thang +/- 2° at sensor.
I have 180° Stat and CC radiator with 7 blade fan.
FYI, head gauge will hit 210°, have 9.5 compression
Map will range from start 28-36 kpa
O2 ends up at around .8, rich, rich flag
Fuel psi 12-13 and I backed it down a 1/4 turn
IAC, well yes Lol. Start @ 98 @1375rpm, 62 @ 800rpm, then around 80 for 900 and 950rpm.
TMI?
Ordered a TPS std motor that looks identical.

Question: You agreeing with assessment for potential TPS issue? It didn't used to do this, and seemed to slowly become an issue.

 

[YakkoWarner]

Not a bad place to start - resistance can go up when things get warmer - before buying a new one do you have a way to blow colder air on it to see it comes back down?

 

[Ricko1966]

I'd clean the throttle bores.Make sure the throttle plates aren't hanging in the bores on dirt,carbon etc.when the throttle body heats up.

 

[Sgt Gus]

Not a bad place to start - resistance can go up when things get warmer - before buying a new one do you have a way to blow colder air on it to see it comes back down?

Compressor, it's pretty hot in that engine bay.

I'd clean the throttle bores.Make sure the throttle plates aren't hanging in the bores on dirt,carbon etc.when the throttle body heats up.

Throttle body is very clean. I pulled the iac and cleaned it, well broke and put in new. I pulled the injectors and cleaned them with seafoam and 12v pwr supply. They were pretty drippy, but that seemed to clean up.
I can send a before after video if interested.

 

[Ricko1966]

Compressor, it's pretty hot in that engine bay.

Throttle body is very clean. I pulled the iac and cleaned it, well broke and put in new. I pulled the injectors and cleaned them with seafoam and 12v pwr supply. They were pretty drippy, but that seemed to clean up.
I can send a before after video if interested.

Awesome,one less thing to mess with.

 

[Sgt Gus]

Update: replace tps and adjusted to 5.7v. It has elongated holes where the screws go. I ck'd iac procedure. Sweet, and let warm up. Then ck'd base idle and set around 525 rpm. She warm idles 775-825.
Cts @ 174°, gauge < 210°
31 kpa, tps .57, 02 .88, rich flag, 7.4 stays in open loop until throttle, AFR 12 psi.
Runs normal for her and I think within most parameters other than still rich, or maybe that's open loop? I couldn't drive yet since I busted the throttle cable.
If anything my diy injector cleaning is meh.

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