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Old 09-10-2004, 05:52 PM   #1
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Question SVT Engine Stumbles When Cold ?

My '02 SVT engine stumbles and threatens to die for a few minutes occasionally at cold startup. Is this a common problem ? Solution ?


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Old 09-10-2004, 05:58 PM   #2
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have you had the YRFO update? That seem to help out
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Old 09-10-2004, 05:58 PM   #3
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I have an 04 svt that does the same thing. Unless I let it warm up for 3-5 minutes in the morning it will act up! I just can't wait to see how it acts when it really gets cold! It's not a big problem though I just get ready to leave 3-5 minutes earlier!
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Old 09-10-2004, 09:26 PM   #4
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The spark is retarded on cold start up to warm the cat fast for that emmissions bs. i would assume a flash or chip would change it.
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Old 09-10-2004, 09:32 PM   #5
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I took my car to the dealer (its under warranty) for the same problem. The tech found a service buliten about this problem, so it must be common. On the intake there are some rubber boots with cheap clamps. These clamps cannot be tightened and they are believed to be causing the problem. They replaced the clamps with some new adjustable ones and flashed the computer with a different program. In the end, the car must turn over a few extra times when started, weather hot or cold, and the cold rough idle is gone.
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Old 09-10-2004, 09:37 PM   #6
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Hmmm... My 04 has this stumbling problem also. Picked it up 2 weeks ago. I think I'm gonna have to take it in and possibly get reflashed... hopefully it doesn't affect my MPG's at all... 30 last tank (700 miles on engine!!!)
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Old 09-10-2004, 10:00 PM   #7
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I wish I got 30, And I have 3500 miles on my car, Hell i'm lucky if i get 24
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Old 09-11-2004, 08:03 AM   #8
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Quote:
Originally posted by erittalf
I took my car to the dealer (its under warranty) for the same problem. The tech found a service buliten about this problem, so it must be common. On the intake there are some rubber boots with cheap clamps. These clamps cannot be tightened and they are believed to be causing the problem. They replaced the clamps with some new adjustable ones and flashed the computer with a different program. In the end, the car must turn over a few extra times when started, weather hot or cold, and the cold rough idle is gone.
Ya mine stumbles when it is cold too...Hmm I am going to check out those clamps. Did they replace the cheap ones with those steel clamps that pipe fitters use?
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Old 09-11-2004, 01:30 PM   #9
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Cold start is a normal issue for the SVTF, nothing a YRF0 cannot help if you have a 02 or 03 SVTF. The 04's I'm starting to see and read more often of these issues. Please keep in mind a surge in RPM's on a cold start is normal, this is the ECU's way of warming up the cat. After a few minutes all will return to normal. But...even with this and the YRF0, I do still have some surge issues and a stumble every now and then, truth be told I think it's just a ECU problem that Ford has not worked out yet. Since another reflash (I think) is not in the works for the ECU, dealing with it, well I'm kinda used to it now.
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Old 09-11-2004, 02:53 PM   #10
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Let me tell you guys, every single SVTF has this issue. It's normal. If you notice, every time you start your car, even if it is not cold, the computer will return to default and think the car is cold. So you will notice every time you start it, it will run in high RPM's for about 30 seconds or so then it will see the temp. conditions of the car. If you take off without letting it sit for about a minute it will hesitate and stuble and act like its gonna die for about a mile or so, then it will go away. We have an 04 and we've done alot of research on this. It's a tuned car, so you need to let it sit for a minute when you start it up. It's really not a big deal. Remeber, you have a hyperformance car. Don't worry about it guys. Basically, just wait till the RPM's drop to their lowest level, then take off, then you will see what i'm talking about.
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