I had a problem like that. Drive you nuts. Everytime you go to look for it, it runs away.
I solved mine by hooking a meter on my overboost switch. The terminal was a bit loose internally, and every now and then flopped around inside. I think I hooked some air pressure on to the switch (14 psi) and wiggled the connector and watched multi meter.
I could make the car stop by wiggling the spade terminal. At that point I felt happy - problem solved.
Alan
__________________
83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-)
|