i have just recently purchased a 2002 ls when i bought it it had a hole in block from rod failure i have recently installed another engine and i have some weird issues and need some help. when key is turned to on engine off during light check i have no engine abs or air bag light and when i start engine the tach only reads when you rev up engine and the speedometer reads way slow when driving 40 mph is about as high as it goes. leaning tword pcm anyone have any ideas before i try replacing pcm