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06-19-2010, 07:22 AM | #1 | |
AF Newbie
Join Date: Oct 2007
Location: Eugene, Oregon
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1990 lumina3.1 Euro starts cold, runs ok until stop engine, then wont restart
This event just started occurring in the last 2 weeks. I can start the engine just fine when it is cold overnight or several hours cold. It will run seemingly fine until I get to where I want to be. When I go to restart it, if it has not been minimum 4 hours since running, it will crank nice and strong but no start. When I turn the key on hot or cold engine, I can hear the pump pressurize but I have not had the pressure tested yet. Only once did I get the service engine light but when I hooked up the sensor reader, I had no sensors showing bad. It flashed the good code only.
I have replaced the fuel pump relay and the fuse right next to relay. I do not know where to check next. If anyone has any suggestions on what to check and how to do so, I would surely appreciate it. Thank you |
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06-19-2010, 12:39 PM | #2 | |
AF Enthusiast
Join Date: Mar 2004
Location: lindsay, Oklahoma
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Re: 1990 lumina3.1 Euro starts cold, runs ok until stop engine, then wont restart
When the problem occurs, have a helper crank it, while you visually check for spark at the plugs. If you have spark everywhere, use a gage and check fuel pressure. Some of the national brand auto stores used to loan out a fuel pressure gage, if you don't have one. Also, use a noid lite and check for injector pulse. An intermittent rpm signal can drive you crazy?
To check for spark at the plugs, pull a spark plug wire loose, use a known good plug or spark tester in the boot. Ground metal part of plug/tester to metal part of engine, watch for spark, engine cranking. |
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Tags |
1990 , 3.1 , euro , lumina , starting |
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