Blew smoke out exhaust on start up. Is this bad? - Mustang Evolution

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Old 02-12-2012, 11:36 AM   #1
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Blew smoke out exhaust on start up. Is this bad?

Started up my car this morning and it blew alot smoke out tha exhaust and its never done that before anyone one know what it is?
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Old 02-12-2012, 11:40 AM   #2
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What color was the smoke?
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Old 02-12-2012, 11:41 AM   #3
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Blue
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Old 02-12-2012, 12:17 PM   #4
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Sounds like a little oil. How many miles on it? If it constantly blows blue smoke you probably have blow by on your cylinders. But if it's only at startup it may be a valve leak that's allowing oil to collect on the valves until startup.
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Old 02-12-2012, 12:20 PM   #5
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It has 40k miles on it and its only on start up
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Old 02-12-2012, 12:26 PM   #6
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That's much better than all the time. Is it both mufflers or just one (unless a V6)?
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Old 02-12-2012, 12:32 PM   #7
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Im not sure cuse i was in the car but it sure did look like it
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Old 02-12-2012, 12:37 PM   #8
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Happened to me when my niece hit the gas while it was off. But if it keeps doing it for u then I dont think that's the case
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Old 02-12-2012, 12:48 PM   #9
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If its both mufflers, then it's probably an intake issue.

---------- Post added at 12:48 PM ---------- Previous post was at 12:40 PM ----------

It could be the PCV system. I believe the 4.6 PCV is bad about sucking oil into the intake. They sell oil separators for that, but I've never actually messed with it. If that's the problem, it's probably not a big issue if it doesn't get any worse.
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Old 02-12-2012, 01:10 PM   #10
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Could be valve sill
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Old 02-12-2012, 01:32 PM   #11
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Quote:
Originally Posted by 06Ghost
Could be valve sill
Could be oil seal. But seems unlikely with only 40k miles. But you can't rule it out.
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Old 02-12-2012, 08:51 PM   #12
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Quote:
Originally Posted by Aggiesrok

Could be oil seal. But seems unlikely with only 40k miles. But you can't rule it out.
Yeah I know had a brain fart it's seal !!

---------- Post added at 09:51 PM ---------- Previous post was at 09:45 PM ----------

Quote:
Originally Posted by Aggiesrok

Could be oil seal. But seems unlikely with only 40k miles. But you can't rule it out.
Brain fart it's seal!!
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Old 02-13-2012, 07:34 PM   #13
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Re: Blew smoke out exhaust on start up. Is this bad?

In my experience, all of the 3-valves occasionally puff blue at start-up. Ford told me its normal, no worries, unless it happens frequently. Once in a while is OK.
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Old 02-19-2012, 01:06 PM   #14
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Re: Blew smoke out exhaust on start up. Is this bad?

This seems to be normal for all Ford modular style engines, both six and eight cylinders. I totally freaked out the first time it happened to my Mustang GT a few months ago, as it only has 3k on the clock! But noticed my wife's Fusion with the 3.0L doing the same thing on occasion. Seems to only do it if you run the engine (cold) for a very short time, shut it down, and restart it again soon afterwards. I did some research online, and spoke with a couple Ford techs. Seems these motors suck oil into the intake under these conditions. So, long story short, nothing to worry about, unless it happens all the time.
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Old 02-19-2012, 04:11 PM   #15
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Blue smoke is common when you do the following. Start your car for like 20 seconds, turn it off, then wait, then start it again. Blue smoke.

This has something to do with the oil delivery system in the modular engine. I see this several times a week when I put my car in the garage for the night. The next morning a puff of blue smoke.
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Old 02-19-2012, 04:51 PM   #16
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The PCV oil separator system is only about $100 depending which one you get. I think this solves the problem and it's better for the engine.
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Old 02-21-2012, 02:11 AM   #17
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Id say run some sea foal thru it too..prolly wouldn't hurt
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