Engine is not idling smoothly

[Arnold1]

I just got my 4 door 2.3L OBX. I like the engine, plenty of power. I have only 50 miles on but noticed when I stop at red lights, that the idling is not smooth at all. It seems that there is some fluctuation of the RPM, (but the RPM gauge is not moving). I thought it might be from the power pull of the AC, so I turned it off but nothing changed. Any idea what it could be? Thanks in Advance

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[Lifeliberty]

You're at a light, so stopped, for on brake, ASS trying to kick in? your ac was on so it shouldn't. Bad gas?

I have a stick and never experienced that. Start with the easy things first, voltage?

The tach sucks, i don't trust it for little things like that, half the time i think it's just for decoration, i go by sound

 

[Arnold1]

You're at a light, so stopped, for on brake, ASS trying to kick in? your ac was on so it shouldn't. Bad gas?

I have a stick and never experienced that

Yeah, no ASS. Bad Gas or just initial break in of the first 100 mile? It is definitely not a normal engine feel. I will run the next tank with premium gas to see how it goes.

 

[Lifeliberty]

It could be a ton of things or nothing

 

[‘21OBX]

My 2.7 idles rough for sure not sure I’ve noticed it on our 2.3 yet. I think it’s partly how low they have the idle set from the factory.

 

[mbagne]

Could it be the fuel pump? There are a few threads out there with folks getting caught out on the trail with a dead Bronco due to the fuel pump. They reported the engine running rough and spotty before eventually dying. Diagnosis was faulty fuel pump.

 

[DEC]

My 2.3 is smooth as silk.

 

[Arnold1]

Could it be the fuel pump? There are a few threads out there with folks getting caught out on the trail with a dead Bronco due to the fuel pump. They reported the engine running rough and spotty before eventually dying. Diagnosis was faulty fuel pump.

I hope not but I will have an eye on it.
BTW: While I think the 2.3 has more than enough power for the Bronco, I think the brakes are terrible. I have seen many reports comparing 2.3 vs 2.7 and the 2.3 Brakes have been reported to be the weak point of the 4 cylinder. I can definitely confirm, not boeno at all....

 

[Campbech]

I have to say I am having the same problem with my OBX. I noticed it when stopped at lights. It kinda seems like a sputter or something.

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