| Backfire from throttle body... |
Subject: Backfire from throttle body... by DEN 14 on 2013/11/3 21:14:19 Car was starting before I replaced water pump on 1992 LT-1. I was very careful to not get the Opti wet. Everything is back together now and it won't start. It has spark since it belched a flame from the throttle body. New injectors, FPR, plugs and MAP. It was suffering from a rich condition before the pump was replaced. Plugs were fouled and the carbon deposits were from this condition. Where to start to look for problem now? I have a new OPti sitting here and I can install it but I wanted to troubleshoot the no start problem first. Has anyone ever had a bad Opti cause a back fire such as this. The opinion I have read on the forums is that it just quits. Stored codes are H42 and H64. I found a bad plug wire while changing the plugs and I am waiting on a new set to arrive. I tried to start it with the injector with no wire to the plug disconnected. Not the smartest thing I guess but every V8 I have had will start and run on 7 cylinders. In the starting sequence, the coolant sensor is involved to some degree and it is new so I would like to rule it out as suspicious. Is there a way to ohm it out? Sorry this is so long but I am puzzled...Thanks! |
