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Raw fuel in cold temps #143037 10/29/08 08:28 AM 10/29/08 08:28 AM
Joined: Apr 2008 Posts: 1,195 Snowing in the north! D Dart 340 OP moparts member
Dart 340 OP moparts member D Joined: Apr 2008 Posts: 1,195 Snowing in the north!	Now that it's below freezing I am noticing a lot of white-ish smoke from the exhaust. I am not loosing any coolant so I do not think it's moisture, and it will continue to do it even after the car has been warmed up and driven on the highway for 45 minutes. Wondering if it might be fuel showing up in the denser air?

Re: Raw fuel in cold temps [Re: Dart 340] #143038 10/29/08 10:05 AM 10/29/08 10:05 AM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	Quote: Now that it's below freezing I am noticing a lot of white-ish smoke from the exhaust. I am not loosing any coolant so I do not think it's moisture, and it will continue to do it even after the car has been warmed up and driven on the highway for 45 minutes. Wondering if it might be fuel showing up in the denser air? It is what is called condensation. A product of all internal combustion engines that is more visable in the cooler/colder weather. It was 40 degrees and somewhat humid the other day and I had small puddles on the ground at the tailpipes. Don't make problem where there is none. Another reason for more frequent oil changes in the winter and always take longer drives to completely warm up the engine and drive train. Not just until the temp gauge reads normal. The oil can still be cold and not warm enough to evaporate any of the internal condensation/moisture build up.

Re: Raw fuel in cold temps [Re: Dart 340] #143039 10/29/08 10:24 AM 10/29/08 10:24 AM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	what he said condensation. I'd have at least a 180 'stat in there. live every 24 hour block of time like it's your last day on earth

Re: Raw fuel in cold temps [Re: RapidRobert] #143040 10/29/08 02:13 PM 10/29/08 02:13 PM
Joined: Apr 2008 Posts: 1,195 Snowing in the north! D Dart 340 OP moparts member
Dart 340 OP moparts member D Joined: Apr 2008 Posts: 1,195 Snowing in the north!	I do have a 180 stat in there. It's quite a bit heavier on the one side pipe than the other. It doesn't seem to burn off even after an hour of highway driving and it is quite heavy, not like normal condensation. I have a goofy miss I cannot find either, that's why I was wondering if it could be raw fuel passing out. I am not losing any fluids that I can see. Past cars have always burned off the condensation of at least reduced it greatly after the car warms up well. This one does not.

Re: Raw fuel in cold temps [Re: Dart 340] #143041 10/29/08 03:45 PM 10/29/08 03:45 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	what do the plugs look like?. I was following a car the other day & water was gushing out of the tailpipe,took me a few seconds to register what I was seeing,dont know if it was just condensation or not but it was substantial. live every 24 hour block of time like it's your last day on earth

Re: Raw fuel in cold temps [Re: RapidRobert] #143042 10/29/08 03:54 PM 10/29/08 03:54 PM
Joined: Apr 2008 Posts: 1,195 Snowing in the north! D Dart 340 OP moparts member
Dart 340 OP moparts member D Joined: Apr 2008 Posts: 1,195 Snowing in the north!	They are a little darker than I would like, but I checked them over the weekend. I can't find the dang miss so that was basically why. Little more brown than tan but not arched out or running too hot.

Re: Raw fuel in cold temps [Re: Dart 340] #143043 10/29/08 04:02 PM 10/29/08 04:02 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	is it missing under load or at a steady rpm & what rpm. how old are the plugs/wires. is it the 340 in your sig. what's your timing live every 24 hour block of time like it's your last day on earth

Re: Raw fuel in cold temps [Re: RapidRobert] #143044 10/29/08 04:20 PM 10/29/08 04:20 PM
Joined: Apr 2008 Posts: 1,195 Snowing in the north! D Dart 340 OP moparts member
Dart 340 OP moparts member D Joined: Apr 2008 Posts: 1,195 Snowing in the north!	Misses worse at initial start up then as it warms up it gets better but is still there. Initial timing is set at 12-14 before, plugs and wires are new. Leak down test showed 8% if memory serves me right and compression is 170-195 on all cyls. It's been a few months since I ran the compresison and leak down tests maybe I will run them again. Yes, it's a 70 340 engine. Running the eddy rpm performer cam and air gap intake. Vacuum pulling at about 10 InHg at idle.

Re: Raw fuel in cold temps [Re: Dart 340] #143045 10/29/08 04:44 PM 10/29/08 04:44 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Quote: It's been a few months since I ran the compresison and leak down tests maybe I will run them again. Though I am a firm believer in the basics & k.i.s.s. if you were good before those areas should still be OK but was it acting up at the time you tested it? Trying to see if anything is jumping up at me, nothing yet. live every 24 hour block of time like it's your last day on earth

Re: Raw fuel in cold temps [Re: RapidRobert] #143046 10/29/08 05:20 PM 10/29/08 05:20 PM
Joined: Apr 2008 Posts: 1,195 Snowing in the north! D Dart 340 OP moparts member
Dart 340 OP moparts member D Joined: Apr 2008 Posts: 1,195 Snowing in the north!	Quote: Quote: It's been a few months since I ran the compresison and leak down tests maybe I will run them again. Though I am a firm believer in the basics & k.i.s.s. if you were good before those areas should still be OK but was it acting up at the time you tested it? Trying to see if anything is jumping up at me, nothing yet. I also believe in the same, as I do engineering and statistics all day long! I think I will look at the cap and rotor again. The more miss at start up depicts a fuel system issue to me, but if I have weak spark on a cylinder I suppose it could mimic that also.

Re: Raw fuel in cold temps [Re: Dart 340] #143047 10/29/08 06:10 PM 10/29/08 06:10 PM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	Typical cold weather carburated running. cold starts on cold engines will a lot of times cause uneven running till warmed up. . Especially if the fast idle isn't working properly. The steam you see I maintain is nothing more than condensation and is completely normal. If it were fuel it would be black, not white. Take it out and run the P*** out of it and get it good and warm and the plugs cleaned up. Remember this is not an injected computer controlled vehicle. Get used to it if you are going to drive these older vehicles in the cold weather.

Re: Raw fuel in cold temps [Re: RapidRobert] #143048 10/29/08 07:03 PM 10/29/08 07:03 PM
Joined: Apr 2008 Posts: 1,195 Snowing in the north! D Dart 340 OP moparts member
Dart 340 OP moparts member D Joined: Apr 2008 Posts: 1,195 Snowing in the north!	Quote: is it missing under load or at a steady rpm & what rpm. how old are the plugs/wires. is it the 340 in your sig. what's your timing Misses more under load it seems like. It's hard to tell while driving due to my summit - dukes of hazzard style exhaust.....

Re: Raw fuel in cold temps [Re: Dart 340] #143049 10/31/08 10:16 AM 10/31/08 10:16 AM
Joined: Jan 2003 Posts: 473 Fort Lauderdale, FL Suregrip mopar
Suregrip mopar Joined: Jan 2003 Posts: 473 Fort Lauderdale, FL	I would suspect a bad plug, wire, or burnt cap and rotor. The weak spark is worsened when the engine is cold with the richer mixture, much harder to get complete combustion with a weak spark on a cold engine... Some people you just can't reach...

Re: Raw fuel in cold temps [Re: Suregrip] #143050 10/31/08 01:04 PM 10/31/08 01:04 PM
Joined: Apr 2008 Posts: 1,195 Snowing in the north! D Dart 340 OP moparts member
Dart 340 OP moparts member D Joined: Apr 2008 Posts: 1,195 Snowing in the north!	I'll check a couple of things again, especially the cap and rotor. Even though the plugs are new doesn't mean they can't go bad. I know hot vaporized gas is white not black. Don't know if I could be seeing that passing in the exhaust or not. I did find one header tube crushed about half way shut, might be fixing that this weekend also.

Re: Raw fuel in cold temps [Re: Dart 340] #143051 10/31/08 01:50 PM 10/31/08 01:50 PM
Joined: Nov 2006 Posts: 1,562 Manistee, Michigan. High Impact pro stock
High Impact pro stock Joined: Nov 2006 Posts: 1,562 Manistee, Michigan.	I just went through the same thing in my 02 S-10. I replaced the cap and rotor and that still didnt fix the miss. It turned out to be number three spark plug. Didnt see a crack but now it runs sweeeeet! Just thought Id share.

Re: Raw fuel in cold temps [Re: High Impact] #143052 10/31/08 11:33 PM 10/31/08 11:33 PM
Joined: Apr 2008 Posts: 1,195 Snowing in the north! D Dart 340 OP moparts member
Dart 340 OP moparts member D Joined: Apr 2008 Posts: 1,195 Snowing in the north!	will check tomorrow, thanks.

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