Originally Posted by 92SVXMAN
If its had a swap done to it I would say to check the cable's to the throttle are set right to keep the engine running, after its been warmed up. Under the black plastic thing on top of the engine you'll find two cable's (off center, passenger side of the engine you'll see them ), turning then to tighten them 1/4th turn at a time by moving the bolts the cable go through the bolt so more of the bolt move closer to the firewall. Then check the tech to see what the engine speed is, you'll want it about 750 to 900 RMP. Then thighten the two locking nut on each cable and then take it for a spin.
That should help and it don't cost aything.
This has nothing to do with his issue though, and will only piss off the eg ecu, and require a tps recal.
The inherent issue has been documented for years, and is a result as I said of the lack of load from a behemoth auto trans and tc.