idle rpm for stock 5.OL

[MustangNick]

Hey guys I just notice this in my car and I was wondering if it is a common theme among the group. My car seems to idle half way between the 750 mark and 500 mark; ~625-650ish. Is this normal? When I let off the brakes it will adjust to 750 on the nose for a couple seconds and eventually settle back to the ~625-650 mark.

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[RevvdMedia]

I believe it is 650 (I don't remember exactly). If you have the manual transmission, the idle speed goes up a bit to assist with forward creeping using the clutch without throttle, and drops to 650ish after it thinks you're going to stay stationary.

 

[Demon Coyote]

After my Lund Tune, my idle is around 740ish. Before the tune it was lower around the 650 range.

 

[ssyellow]

I believe it is 650 (I don't remember exactly). If you have the manual transmission, the idle speed goes up a bit to assist with forward creeping using the clutch without throttle, and drops to 650ish after it thinks you're going to stay stationary.

This.

 

[MustangNick]

Ah this makes sense thanks everyone! The creep function is pretty handy for traffic I must admit

 

[BeauxXL1200]

After my Lund Tune, my idle is around 740ish. Before the tune it was lower around the 650 range.

Mine too, Demon. After I installed the Lund tune, I thought my idle rpms had gone up some. Couldn't really remember what it had been, but I thought it increased. Posted this concern in another thread, and some folks replied that 750 is normal. Not really worried about it I suppose.

 

[POOPonYOU]

Does your car ever rock to the left and right while the engine is warming up? Mine will do this after warming up for about 2 minutes. It'll rock softly after about 2 minutes then it goes away and then repeats. Normal? First V8 manual transmission.

 

[BeauxXL1200]

Does your car ever rock to the left and right while the engine is warming up? Mine will do this after warming up for about 2 minutes. It'll rock softly after about 2 minutes then it goes away and then repeats. Normal? First V8 manual transmission.

I haven't noticed any rocking, John. But Ill pay attention to her in the morning to see if I can detect any.

 

[Barrel]

Does your car ever rock to the left and right while the engine is warming up? Mine will do this after warming up for about 2 minutes. It'll rock softly after about 2 minutes then it goes away and then repeats. Normal? First V8 manual transmission.

Normal. I rather enjoy it.

 

[Chameleon]

Completely normal.

 

[V8Stang15]

Even the 2.3 Turbo did that rock/wobble thing during a long idle. Made it feel far more powerful. I suppose the V6 does it too.

 

[SlowRed]

Yup it's rocks and I HATE it

 

[350sexZ]

A little off topic but still on. I think I might have a slight vacuum leak. At idle the vacuum gauge should remain steady correct. Mine jumps a little at idle.

 

[Demon Coyote]

Mine too, Demon. After I installed the Lund tune, I thought my idle rpms had gone up some. Couldn't really remember what it had been, but I thought it increased. Posted this concern in another thread, and some folks replied that 750 is normal. Not really worried about it I suppose.

I honestly like the way it idles now (@ 750), rather than what it was before, almost made it sound like the car had baby baby cams lol.

 

[AngryBeavers]

A little off topic but still on. I think I might have a slight vacuum leak. At idle the vacuum gauge should remain steady correct. Mine jumps a little at idle.

Do the RPMs jump with it? Mine does this the vaccuum will hover around ~20.9 or so then I hear a skip in the exhaust and it will click up to ~18.8. then same thing and back down. You can feel it in the shifter if your hand is resting on it. Only does it sometimes is that a vaccuum leak?

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