That's very interesting....... here's an article that refers to the power transistor on the 300GT and Stealth - granted a different physical design - but the article makes a distinct statement that the test can be done off of the vehicle:

Quote
Inspection
The service manuals, in section 16 for the 3000GT manuals or in section 8 for the Stealth manuals, offer a few troubleshooting hints plus some service and inspection tests. Under troubleshooting the manuals suggest that a malfunctioning PTU can lead to the following symptom: insufficient or no spark. This suggests that either the PTU works and you get pulses to the coils, or it does not work and the coils do not get pulses. With an analog volt-ohm meter (VOM) you can perform the tests shown below directly on the PTU. These are easy to perform with the PTU off the engine. However, you should be able to perform the tests with the PTU in place and harness disconnected.


stealth316

Anyway, glad yours is running. <img src="/forums/images/graemlins/kewl.gif" alt="" />

Frank

'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum