Others have already said this, but my bet would also be for the TPS as the likely cause.
Yes, you can replace it without removing the throttle body.
I've found that removing the EGR valve and pipe on my '93 helped a bit in gaining access to the mounting screws, but it's still a bit difficult to get to them...and if you didn't already know this, you don't want to attempt to replace the TPS while the engine is warm or hot, or you may burn yourself.

Like I said before, you can loosen the two screws with a pair of vicegrips and then the screws should turn out by hand. That worked for me.

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2000 SSEi - SilverBullet - 78,000 kms, 4" "straight shot" custom headlight ram air inlet, TOGs, 1.9's, Lsd, 2.9-3.4"MPS 10-15 psi, Ported GenV, EGR eliminated, OR pushrods, oil volume kit, trani cooler & shift kit, Titanium retainers, 90 lb springs, 160 Stat, 42# injectors, Fuel pump voltage increase, Wideband O2, 3" to dual 2 1/2" Magnaflows, Snow Meth/water injection, after SC temp gauge, 255/50WR17, timing commander set 15-18*@WOT, 2 speed Fan over-ride, disabled DRL, Solid motor mount, Meziere Electric water pump, adjustable fuel pressure regulator, Drilled & slotted rotors/ceramics, GXP sway bars and STB, Upgraded and rebuilt transmission with ZZP 2500 rpm stall TC, Pioneer Bluetooth stereo with sub and 800 W amps, PB 13.5 quarter, (April 2014 car of the month)

The screws holding the TPS weren't even close to coming out. I ended up removing the throttle body to get at the screws holding the TPS. With the throttle body in hand, I snapped one screw off and the other is nearly stripped it is lodged so tight. The screws holding the IAC were removed without issue. I will have to make a run to the mom and pop garage this morning to see if they will drill them out and possibly tap them.

I have the throttle body cleaned and it is patiently drying.

This is what I am currently looking at (yes, my engine bay is a greasy dirty mess ). Should I give the chamber some carb cleaner or let it be?



Marmot

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1993 Bonneville SE - 157K miles

Good "God's Country!" Screw was so frozen that it snapped off(?)! Being "upside down" and all, it would be easy to turn them the wrong direction and do that. No insult intended. I'm just adding that for other readers who are considering this procedure.
If cleaning the TB, use only MAF cleaner on the MAF sensor so as not to screw it up. That can be a costly mistake. But if your MAF has never been cleaned, you might be surprised at the increase in performance.


Hmmmm... your 93 must be a different vintage than mine. My IAC is a screw in one like this

Glad you are on the road to recovery, though.
Sled

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1993 Red SSE - Bone-Stock except for High Perf. (LOL) Power Antenna-Original Owner. Pushing 140K - It's the love of my wife.
'05 Magnum Hemi R/T "Great White" - Classic VW Beetles

The TPS is replaced and now my Bonnevizzle is patiently waiting to hit the road.

I can never get a seal with the paper thermostat gaskets, so I use silicone gasket sealant. It says to wait 24 hours for the silicone to cure. I did start it for a second just to make sure she still runs. All is good so far.

Thanks for the help and the TechInfo section...I couldn't have done it without the assistance.

*orders a round of virtual beers*

Marmot

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1993 Bonneville SE - 157K miles

The IAC on my Bonnevizzle has two plastic wings with a small bolt going into each just like the TPS.

Marmot

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1993 Bonneville SE - 157K miles

No problem, hope she runs well. I'm fairly sure you shouldn't have any problems. Glad to get another bonne' back on her wheels!

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Bonneville SE -- Cruising the mountains, surfing the lowlands, and passing broken down competition since 1993!