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Old 08-22-2011, 06:55 PM
oab_au oab_au is offline
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Re: stumbling idle and backfiring, PLEASE HELP!!!!!

Quote:
Originally Posted by 92_LSL View Post
It backfires from the exhaust. From a dead stop the car hesitates until 2,000 rpm when accelerating, and then drives normally.
OK that means that there is unburnt gas in the exhaust, that is being ignited. That would suggest that the ignition is being interrupted,(the spark missing for a couple of firings), igniting it when it returns.

As you have just done a trans swap, I would check all the wiring that you have touched, disconnected, or wriggled, including the ground wire at the rear of the engine that runs to the firewall under the engine steady 'dogbone).

One of them is not connected properly.

Harvey.
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