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I have low vacuum pressure, it is reading about 15in hg and I am getting terrible mileage. I replaced all the vacuum lines. I have a scanmaster and the readings are Knock 726 ret. 0.0 Maf 5.0 LV8 38 Volts 13.4 Int 128 BLM 127 Speed 0 Coolant 178 Air 119 Rpm 725 TPS .42 IAC 16...

My cooling fan will not run. I have looked at the troubleshooting guide on Vortex . Rlys 5 amp fuse is good. I have 12v always on large red wires at the the relays , and I have 12v on brown wire with key on. I have pulled the connector at the a/c, and fan works when A is grounded. I jumpered...

I am a new member, but I am an original owner of an 87 GN. All original- no mods. The tranny is not locking up. I have been trying to troubleshoot it myself with help of reading form posts. I have measured voltage at tranny and at ALDL and both are good. Brake pedal will drop 12v when pressed. I...