Stuck Throttle? - ZR-1 Net Registry Forums

Usa2405 · 03-18-2025

Out driving my new 95 today. I made a very aggressive start from a dead stop and up an on ramp to the Tollway. The throttle was too the floor through the first couple gears and when I lifted to catch third, the engine did not throttle down at all. It was stuck about 5K. I put it in 6th and used the brakes to control my speed to the next exit and shut it down. The gas pedal was not stuck to the floor, and it felt normal. I bounced the gas pedal a few times and restarted and it was still stuck. I opened the hood and looked around, but you really can't see anything, so I got back in tried it again and it started and ran as normal. I did a few more full power accelerations after that and everything was fine.

Where should I start to troubleshoot? Stuck throttle plate? Throttle cable? ASR system? I searched the forum here and did not find any posts similar. thanks for any help!

Corvette95 · 03-18-2025

Floor mats is your first inspection.

Young1 · 03-20-2025

Possible mice debris in the throttle plate cable TPS area. Ditto floor mats or aftermarket wiring hanging around.

Jagdpanzer · 03-21-2025

Could be the primary throttle plate hanging up. It's actuated by a cam on the secondary throttle shaft and spring return to close
IMG_4615.JPG

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03-18-2025	#1
Usa2405 Join Date: Jan 2025 Location: North Texas Posts: 11	Stuck Throttle? Out driving my new 95 today. I made a very aggressive start from a dead stop and up an on ramp to the Tollway. The throttle was too the floor through the first couple gears and when I lifted to catch third, the engine did not throttle down at all. It was stuck about 5K. I put it in 6th and used the brakes to control my speed to the next exit and shut it down. The gas pedal was not stuck to the floor, and it felt normal. I bounced the gas pedal a few times and restarted and it was still stuck. I opened the hood and looked around, but you really can't see anything, so I got back in tried it again and it started and ran as normal. I did a few more full power accelerations after that and everything was fine. Where should I start to troubleshoot? Stuck throttle plate? Throttle cable? ASR system? I searched the forum here and did not find any posts similar. thanks for any help!

03-18-2025	#2
Corvette95 Join Date: Jan 2006 Location: Decatur, AL Posts: 1,141	Re: Stuck Throttle? Floor mats is your first inspection. __________________ Corvette95 Registry and Forum (*************) 1989 C4 Conv Wht/Gry Auto Hardtop Top Flight SOLD 1995 C4 Coupe Purple/Blk 6 Speed 1989 C4 Conv Wht/Red Auto SOLD 1996 C4 Conv Black/Tan Auto SOLD 1994 C4 Coupe Wht/Blk SOLD 1995 C4 ZR-1 White/Gry #278 Dual Dunn Head SOLD 1986 C4 Coupe Black/Red 4+3 SOLD 1990 C4 ZR-1 Red/Red #0454

03-20-2025	#3
Young1 Join Date: Sep 2016 Location: Ocala, FL Posts: 904	Re: Stuck Throttle? Possible mice debris in the throttle plate cable TPS area. Ditto floor mats or aftermarket wiring hanging around. __________________ Steve Young 1991 ZR-1 Quasar Blue Metallic/Black #729 Second Owner 1991 ZR-1 Dark Red Metallic/Black #2040 SOLD 1990 ZR-1 Dark Red Metallic/Saddle #1670 SOLD Double your happiness.....complain half as much.

03-21-2025	#4
Jagdpanzer Join Date: Apr 2007 Location: Northern VA Posts: 2,651	Re: Stuck Throttle? Could be the primary throttle plate hanging up. It's actuated by a cam on the secondary throttle shaft and spring return to close IMG_4615.JPG Sent from my iPhone using ZR-1 Net Registry __________________ Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake