miss firing, back firing, cutting out! help!!
Banned
Joined: May 2008
Posts: 1,031
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From: The Communist Puppet State of Mexifornia
As well as not having an upstream 02 sensor.
The computer cannot mix properly without all of its sensors. I went through this today with a bad 02 sensor. Upstream drivers side went, computer thought left bank was lean, so it dumped all the fuel it could into it, fuel fouled all the plugs.
The computer cannot mix properly without all of its sensors. I went through this today with a bad 02 sensor. Upstream drivers side went, computer thought left bank was lean, so it dumped all the fuel it could into it, fuel fouled all the plugs.
Registered User
Joined: Sep 2014
Posts: 1
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2001 dodge ram 5.2
truck backfires through air cleaner while driving idles fine then straightens out. replaced plugs injectors wires still does it. code comes up #3 cyl. miss firing. light don't always come on. changed crank shaft sensor, still does it seems worse when fuel gets below 1/4 of tank.
Last edited by pete stout; Sep 21, 2014 at 12:17 PM.
Record Breaker
Joined: Sep 2012
Posts: 2,439
Likes: 73
From: S. Florida
If you're getting a mix of backfire (exhaust) and coughing (intake), I would replace the crank position sensor... especially if your anywhere near 100K.
Last edited by Spillage; Sep 13, 2014 at 01:51 PM.
