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Trouble starting after sitting for 6 hours
Topic Started: Oct 29 2012, 01:56 PM (693 Views)
cwoodson79
Fresh Fish
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Hello all I am new to the forum so I apologize in advance for any mistakes in posting. I have a 1993 3 cylinder Metro that is having trouble starting after sitting for awhile, say longer than 6 hours. The engine turns over but I have to floor it to get to finally start after a few minutes of the engine turning over. When it finally starts a cloud of white smoke comes out of the exhaust. I have already replaced the mass airflow sensor this summer and that seemed to help for a little while but the starting problem is back. A guy at the local auto parts store said it sounds like a bad fuel pressure regulator. Does this sound like the problem? Thanks for your help.
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Tubablake
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That could be your problem. Run a compression test. I had a 1987 Astro that had that problem and it turned out to be leaky fuel lines. The gas would leak slowly out of the fuel lines and then would take some pumping of the pedal while I was turning the key to get it to start.
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Memphis metro


Possible injector or fuel pump. Put a fuel pressure gauge on it and verify the fuel pressure is within range. Post 41 explains how,

http://geometroforum.com/topic/4464045/3/
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Old Man


White smoke or light blue. Light blue = oil burn = do a compression test. White = water in combustion chamber = blown head gasket.
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cwoodson79
Fresh Fish
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Thanks for all of the suggestions. I will let you know what we find out.
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CLund76
New Member
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Black smoke = Excessive Fuel, (Think of Diesel trucks blowing smoke) Possible leaking injector, Coolant temp sensor thinking it's -40 degF...
Blue smoke = Burning Oil, Past rings, valve stem seals...
White smoke = Water in combustion chamber, probable head gasket issue leaking coolant.

To check for excessive fuel, watch fuel pressure gauge to see if the pressure bleeds off, also you could watch the injector to see if it drips.

To check for burning oil, you may be able wipe the inside of the tail pipe and see if its excessively sooty

To check for Coolant in combustion chamber, there are a few ways, you can get a block tester like this one
Block tester
, or take it to a shop that can test for combustion gasses in the coolant system.
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