1987 obd I code 24
Thread Starter
Intermediate
Joined: Apr 2023
Posts: 26
Likes: 4
1987 obd I code 24
I’m bringing this vette back to life. It runs pretty good. Needs an ignition tune up. It back fires if I give it throttle to quickly. After about 5-10 mph I can floor no problem. Every time I drive I get a code 24…
24- vehicle speed sensor (vss) or circuit
Could the backfiring cause that code?
24- vehicle speed sensor (vss) or circuit
Could the backfiring cause that code?
Le Mans Master
Joined: Sep 2013
Posts: 6,192
Likes: 750
From: near the thumb in the mitten
No, vss mounts in speedometer hole of transmission. It sends a AC voltage signal to the cluster. Does speedometer work? The cluster buffers or converts AC signal to DC sending it to the ECM.
Le Mans Master
Joined: Sep 2013
Posts: 6,192
Likes: 750
From: near the thumb in the mitten
Batee.com has info about cluster..Using a digital voltmeter on ac volt setting, you can evaluate if vss is sending a signal to cluster. You could remove sensor and spin gear see it sensor generates voltage.
Misfire and backfiring ? Timing, distributor cap,rotor ,wires, spark plugs misadjusted or faulty sensor, vacuum leaks , low fuel pressure, poor grounds ...I would find some who knows more than you to help you.
Misfire and backfiring ? Timing, distributor cap,rotor ,wires, spark plugs misadjusted or faulty sensor, vacuum leaks , low fuel pressure, poor grounds ...I would find some who knows more than you to help you.
