Failed dashpots?

[NoDOHC]

90 vert with recently built JDM Tii. New TPS, the car idles and runs beautifully. The idle is rock solid at 750.

The only problem is that when you let off the gas the car will often die. The rpms drop to almost zero (there is a final big mark on the tach which I assume is supposed to be 500). Sometimes it recovers and sometimes it dies.

Should be the dashpot. So I swapped in the one from the NA. Before installing the NAs into the Tii I compared them and they both provide the same resistance.

However, it didnt change. Adjusted it with the TPS as per the FSM. No change. If I rev it to 4500 and let off, you can see the TPS slowing the throttle return but it is fully bottomed out by the time the tach reads only 3000.

Are dashpots a common failure? Any good sources for a replacement?

Thanks,

Jim

[vrracing]

90 vert with recently built JDM Tii. New TPS, the car idles and runs beautifully. The idle is rock solid at 750.

The only problem is that when you let off the gas the car will often die. The rpms drop to almost zero (there is a final big mark on the tach which I assume is supposed to be 500). Sometimes it recovers and sometimes it dies.

Should be the dashpot. So I swapped in the one from the NA. Before installing the NAs into the Tii I compared them and they both provide the same resistance.

However, it didnt change. Adjusted it with the TPS as per the FSM. No change. If I rev it to 4500 and let off, you can see the TPS slowing the throttle return but it is fully bottomed out by the time the tach reads only 3000.

Are dashpots a common failure? Any good sources for a replacement?

Thanks,

Jim