burgerman Posted August 26, 2008 Share Posted August 26, 2008 I am working on a friend's 1993 ls400. The problem is, the engine will fire up and quit in a matter of seconds. A new fuel pump was installed ( not by me ) when the problem showed up and did not remedy the problem. I wanted to do a quick check of the "fuel pump relay", but can't locate one, if it exists. Does it exist and where might it be? My thought is that the car( and fuel pump ) is starting on the " starting ignition pulse ", but fails on the run signal. I'll be pulling codes soon, but would really like to do the simple swap out if a fuel pump relay is a source of problems. Thanks for any and all help. Quote Link to comment Share on other sites More sharing options...
landar Posted August 26, 2008 Share Posted August 26, 2008 I am working on a friend's 1993 ls400. The problem is, the engine will fire up and quit in a matter of seconds. A new fuel pump was installed ( not by me ) when the problem showed up and did not remedy the problem. I wanted to do a quick check of the "fuel pump relay", but can't locate one, if it exists. Does it exist and where might it be? My thought is that the car( and fuel pump ) is starting on the " starting ignition pulse ", but fails on the run signal. I'll be pulling codes soon, but would really like to do the simple swap out if a fuel pump relay is a source of problems. Thanks for any and all help. Although the symptoms appear to indicate a fuel delivery problem, have you checked the ignition? A simple test would be to remove the air filter and spray some starter fluid into the intake as it begins to die. If it keeps running then you indeed have a fuel issue. If not, then ignition. Quote Link to comment Share on other sites More sharing options...
burgerman Posted August 27, 2008 Author Share Posted August 27, 2008 I pulled a "15" code off of the OBD. Quote Link to comment Share on other sites More sharing options...
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