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When I parked my 89' this past winter it had started to overboost and cut out while at a rally-x. Once I realised what it was doing I basically drove home and parked it since I didn't have the time or the place to work on it. Getting it sorted now I figured I would test the different components and make sure the lines were intact. Wastegate seems OK with light pressure and suction (whatever I can do with my mouth!), the lines to and from the electrovalve were good, and the electrovalve worked properly with 12V across the terminals. I ensured the wastegate actuator rod could move, and all seemed OK. The connection at the electrovalve was a bit dodgy so I redid the connectors and cleaned it all up. Reassembled it all and the damn thing still bucks and feels like it's over boosting. The wiring has been hacked on the car as I was worried that the overboost sensor wasn't working as it should, so while looking at it it finally dawned on me that it looks like a previous owner has used the overboost sensor to trigger the cold start injector? Wires are cut and soldered all over the place and it's a complete mess - but from what I can tell this is what has been done. I'll recheck and confirm as it was pretty late when I realized what they had done. Still baffled with the overboost as the electrovalve's home position (no power) should basically connect the compressor outlet to the wastegate. The only thing I can think of was that either the wastegate actuator leaks at higher boost levels, or one of the boost lines is. All the lines tested good, and all of the connections are zip tied... This one has me baffled! I'll update later when I can actually use a pressure signal to test all the lines and the wastegate manually with at least 15 psi... Rabin