| Running bad, codes, Need Help Please |
Subject: Running bad, codes, Need Help Please by skirlin on 2011/8/16 22:48:26 Hello everyone, it's been awhile. My 92 has been running great until now. It started running very rough (engine shakes like it has a huge cam), spark knocking, back firing, and lousy acceleration. All gauges look normal. It is a 1992 Lt1 with almost 160k, no mods, automatic. My first thought was the Opti and I did some research here and that sounded close. I used Andy's write up for checking codes (very cool, thanks Andy)but what I got back was not what I had expected. 1 C.12 4.H28 Quad Driver 3 H32 EGR Valve/circuit H68 A/C Relay error (explains why AC never shuts off). H72 Gear Selector Switch Error --- 9. --- I grabbed my Helms Manuals (again, the first purchase after I got my 92 as recommended by the Gurus)I found everything in the manuals. My question is: Can an faulty EGR Valve cause this much trouble? Does this info tell you something I am not seeing? Any help would be much appreciated. Thank you |
