WTB: 1986 Corvette automatic prom
Thread Starter
Heel & Toe
Joined: Dec 2025
Posts: 17
Likes: 1
1986 Corvette automatic prom
In my 1986 Corvette I still have the original PROM, and I’ve seen that updating to the newer BUC 1724 PROM (1227942) might fix some issues I’m having.Does anyone have one for sale or know where I can get one?
Thread Starter
Heel & Toe
Joined: Dec 2025
Posts: 17
Likes: 1
The problem is it drives fine, but as soon as I hit a certain spot on the pedal right near where you first start pressing it, it sets Code 33 and goes into limp mode. If you stay just below that spot it drives fine, and if you go past it really fast you can still drive fine, but if you hold it there for more than a second it sets the code every time. If I turn the car off for about 15 seconds and turn it back on, the code goes away and it drives fine again until I hit that spot. I’ve already replaced the TPS and the mass air flow sensor and it’s relays but it still doing it. Also it shows low mpg
Melting Slicks
Joined: Apr 2001
Posts: 2,116
Likes: 221
From: Ca.
The problem is it drives fine, but as soon as I hit a certain spot on the pedal right near where you first start pressing it, it sets Code 33 and goes into limp mode. If you stay just below that spot it drives fine, and if you go past it really fast you can still drive fine, but if you hold it there for more than a second it sets the code every time. If I turn the car off for about 15 seconds and turn it back on, the code goes away and it drives fine again until I hit that spot. I’ve already replaced the TPS and the mass air flow sensor and it’s relays but it still doing it. Also it shows low mpg
Supporting Vendor
Joined: Nov 2025
Posts: 274
Likes: 33
From: Cotopaxi, Colorado
👍 I think 45 gps is a standard from
idle to 1/4 throttle I can raise it if it’s hitting the threshold as well as other mild performance gains.
idle to 1/4 throttle I can raise it if it’s hitting the threshold as well as other mild performance gains.
Last edited by Tunedperformancedotorg; Today at 10:07 PM.
