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bebertrand
Novice
Aug 31, 2012, 10:07 AM
Post #1 of 15
(2116 views)
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I have a nissan 720 2.4i it runs for 5 min or so them it dies out. checked the fuel pump and change the fuel filter. when it dies it will not restart crank only. let it set or 2 to 3 hours and them it might start up. if it starts up it will run for 2 to 5 min and then the same thing. so i check the coils after it dies there is no spark from the coils. so i replace them and the mods and the distrbutor. checked it the same thing runs then dies. what for 2 to 3 hours starts up. can some one please help thank you.
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 31, 2012, 12:26 PM
Post #2 of 15
(2081 views)
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Test for injector pulse using a small bulb called a noid light. If none found, check for power supply at one side of the injector with the key on.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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bebertrand
Novice
Aug 31, 2012, 1:40 PM
Post #3 of 15
(2071 views)
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so the Fuel Injectors will make it stall out. it dose sound like is runing out of gas. Plus the fuel Injectors will make the coils have no spark
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nickwarner
Veteran
/ Moderator
Aug 31, 2012, 2:47 PM
Post #4 of 15
(2068 views)
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He's not saying that at all. The injectors have no control over your spark. You could take them off the car and crank it over and still have spark. But there has to be proper signals from other sensors to make the PCM signal the coils and injectors to fire. By checking for power and pulse you are giving a direction to take the diagnosis instead of throwing hundreds of dollars of parts into it to still have a broken down car.
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bebertrand
Novice
Aug 31, 2012, 2:54 PM
Post #5 of 15
(2066 views)
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ok thank you i did know the injector did that. ill check that. so if only one injector is bad it will stall it out.
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 31, 2012, 3:30 PM
Post #6 of 15
(2060 views)
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The injector isn't causing anything. It merely shares some signals with the spark that we need to know if are present or not.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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bebertrand
Novice
Aug 31, 2012, 3:48 PM
Post #7 of 15
(2053 views)
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ok after the truck dies the injector are still getting the signals there is gas still going into the eng. my wife was not happy she had to help
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 31, 2012, 4:02 PM
Post #8 of 15
(2049 views)
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How did you determine that?
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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bebertrand
Novice
Aug 31, 2012, 4:06 PM
Post #9 of 15
(2042 views)
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took my test light and checked and pulled the air cleaner off and was looks down the body before it died and then my wife was cranking the eng over as i was looking down body and there was gas going down into the intake then i took my timeing light and hooked it to the coils and she ceanked the eng and no spark from both coils
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 31, 2012, 4:09 PM
Post #10 of 15
(2039 views)
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What year is this truck?
Is this throttle body injection?
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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bebertrand
Novice
Aug 31, 2012, 4:12 PM
Post #11 of 15
(2031 views)
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1986 1/2 2.4i 720 yes Throttle injection
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 31, 2012, 4:41 PM
Post #12 of 15
(2025 views)
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The most logical cause of the problem would be the Power transistor which serves as an ignition control module. Of course this should be professionally diagnosed to be sure. It's mounted next to the coil.
I'm assuming you have verified power supply to the + side of the coil with the key on.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
/ Moderator
Aug 31, 2012, 6:42 PM
Post #13 of 15
(2014 views)
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You can also do a bypass test at the igniter trigger circuit with your test lamp and a spark tester at the end of the coil wire. Bypass test will tell you if the module is good as long as the coil is good and you have power and ground at the igniter. If you can get it to spark by doing a bypass test on the igniter trigger circuit, you need to look at ECU position sensor input problems.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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bebertrand
Novice
Aug 31, 2012, 11:51 PM
Post #14 of 15
(1994 views)
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I got new mods and coil and stall the same
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Discretesignals
Ultimate Carjunky
/ Moderator
Sep 1, 2012, 8:16 AM
Post #15 of 15
(1979 views)
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I guess we are playing swaptronics.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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