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I always coast to a stop, until this car I had driven auto's my entire life, and knowing me, I'd still just want to hit the brakes without the clutch while in gear, and that would stall out my car.


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I keep the clutch in and go through the gears in case i have to start accelerating again. Just something i've naturally done.


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I forgot to add that I don't coast in Neutral, rather I let it stay in 4th or 3rd and wait till about 1K RPM before I depress the clutch and go into 1st. By then I'm going less than 15 kph and still in a gear, always.


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Originally posted by Nic_ContourSE99:
You can't stall the engine while coasting. It can stall if you are in 5th gear and going at 5mph, you can't stall it in neutral, with or w/out the clutch depress.



You are completely wrong eh.

The engine most definitely can and will stall when coasting in neutral.


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PLEASE explain that, Greg... I have coasted down 7 and 10%grade hills just for the louge effect, and it drops to idle, then stays there.. EDIT: Also do this on one particularly long, sweeping downhill right hander.. I throw it in neutral and coast through the curve (to lower the rpms and avoid oil issues... never dies../EDIT

I am REALLY asking to be made to look like an idiot, but uhm.. 1. how is coasting any different than idling in neutral (which it won't stall in)?

2. How does that explanation (that you give for number 1) apply to OUR platform, in which I have experienced it zero times in a nearly every day routine.

Thanks.

Ray

Last edited by Ray; 06/12/05 04:36 AM.

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Originally posted by Ray:
I am REALLY asking to be made to look like an idiot, but uhm.. 1. how is coasting any different than idling in neutral (which it won't stall in)?

2. How does that explanation (that you give for number 1) apply to OUR platform, in which I have experienced it zero times in a nearly every day routine.



1. The VSS. The PCM knows how fast the car is actually moving and that it is not at rest. It idles up and runs rich when "idling" & moving. A richer mixture is more likely to stall due to a sudden air pressure drop.

2. "Any" car will be more susceptible to stalling when coasting if you hit the brakes or sustain a panic stop. That's a given for any car regardless of computer control or not. Manifold vacuum is vacuum.


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Ray:
PLEASE explain that, Greg... I have coasted down 7 and 10%grade hills just for the louge effect, and it drops to idle, then stays there.. EDIT: Also do this on one particularly long, sweeping downhill right hander.. I throw it in neutral and coast through the curve (to lower the rpms and avoid oil issues... never dies../EDIT

I am REALLY asking to be made to look like an idiot, but uhm.. 1. how is coasting any different than idling in neutral (which it won't stall in)?

2. How does that explanation (that you give for number 1) apply to OUR platform, in which I have experienced it zero times in a nearly every day routine.

Thanks.

Ray




I totally agree with you Ray. I never, and you can't stall an engine when it's in neutral. I don't understand why the PCM should get the mixture richter when you are coasting, there is no difference when idling and coasting. The PCM won't send the command to get mixture rich enough to stall the engine.

When the engine revs below a certain RPM, i think it's under 1250 RPMs, the IAC takes control of the idle, so it won't let the engine stall.

Nic.


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I'm always afraid when going down a hill OR flat, that when I shift down, to leave the clutch in. Because the RPMs go so high when trying to go down a hill and shifting down....


Should I let the engine just do it with the high rpms, keep the clutch in, or shift to N.

My fuel consumption on the SVT has been poor recently. Not sure if it's my driving habits, or something needs to be cleaned up.

I have an appointment with ford to machine the rotars and put new break pads on, should I have them look at the fuel injector?



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Originally posted by DemonSVT:
1. The VSS. The PCM knows how fast the car is actually moving and that it is not at rest. It idles up and runs rich when "idling" & moving. A richer mixture is more likely to stall due to a sudden air pressure drop.

2. "Any" car will be more susceptible to stalling when coasting if you hit the brakes or sustain a panic stop. That's a given for any car regardless of computer control or not. Manifold vacuum is vacuum.




OK, I tested this. Today, going down my favorite hill to coast down, I accelerated up to 70 mph, shifted out of gear (into neutral) and then I stood on the brakes. No stalling, no nothing...


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Originally posted by DemonSVT:
Originally posted by Nic_ContourSE99:
You can't stall the engine while coasting. It can stall if you are in 5th gear and going at 5mph, you can't stall it in neutral, with or w/out the clutch depress.



You are completely wrong eh.

The engine most definitely can and will stall when coasting in neutral.




I can vouch for Greg's statement- as I've actually stalled in neutral once.

I was rowing through gears extremely granny style in a parking lot, trying to find a space. Sudeenly a little kid runs out from between some parked cars and I stand on the clutch and brake, screeching to a stop. When the coast was clear, I noticed the engine had stalled. My first thought was that I didn't disengage the clutch fast enough, but then I saw that I wasn't in gear.

For you research/re-creationist guys: I was accelerating slowly from ~10-15 mph, The panic stop occurred mid-shift, I hit the brake & clutch simultaneously. (Yeah, yeah, I know I was probably already pressing the clutch in , since I was in the middle of shifting...) ...And yes, I tore the parent a new one for not paying closer attention to her kid (They were a good 15 feet apart, walking between cars, & the parent was on her cell!)


-Chuck Dienzo Black 98.5 E1 SVT #5022 of 6535 Born on March 16, 1998 "If trees could scream, would we be so cavalier about cutting them down? We might, if they screamed all the time, for no good reason."
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