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Intake backfire 99'

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Old 03-11-2016, 01:59 PM
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Year: 1999
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Default Intake backfire 99'

Back at with an intake backfire troubleshoot. Been reading through a lot and there's been a lot of different cures to peoples backfire cases be it sensors, fuel pumps, etc.

I haven't gotten too deep into it. Its typical, in 1st/2nd 1500-2200 rpms I'll occasionally get a very noticeable lag and IG I don't let off the gas it'll stay there... In this state of lag. Off the gas, then step on it, intake backfire.

I have a cowl intake, mustang injectors, 60mm tb. Brand new ntk o2 sensors, plugs/wires/rotor/cap all new in last year. New radiator. New CPs, new tps.

Coil pack may be in the future, idk if the MAP sensor is a solution for non renix.

Any thoughts appreciated
Old 03-11-2016, 02:45 PM
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Catalytic converter may be restricting flow.
Old 03-11-2016, 03:19 PM
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Any codes, black smoke out of the exhaust?
Old 03-11-2016, 03:27 PM
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Originally Posted by Turbo X_J
Any codes, black smoke out of the exhaust?

No codes no smoke and I should add it only does it at temp
And this is one of the cleanest rust free jeeps you'll ever see so although I'm sure the cat is a viable culprit that I do just kinda wanna ditch I don't think that's it.
Old 03-11-2016, 03:39 PM
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Before or after TB and TPS?
Old 03-11-2016, 07:16 PM
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Its done it before and after all mods if I remember correctly
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