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newenginewontstart [2009/02/04 12:45]
twdorris
newenginewontstart [2010/05/19 06:24]
twdorris
Line 4: Line 4:
 ====== Details ====== ====== Details ======
 When a new engine doesn'​t start, you have to check the basics: computer, fuel and spark When a new engine doesn'​t start, you have to check the basics: computer, fuel and spark
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 ===== Computer ===== ===== Computer =====
-First, verify that the ECU is powering up and seems to be functioning normally. ​ Observe the check engine light when you first turn on ignition. ​ It should come on for five seconds and then go back out.  If it stays on constantly, then suspect something related to the ECU and/or wiring leading up to it.+First, verify that the ECU is powering up and seems to be functioning normally. ​ Observe the check engine light when you first turn on ignition. ​ It should come on for five seconds and then go back out.  If it stays on constantly, then suspect something related to the ECU and/or wiring leading up to it.  In addition to the check engine light test, check to see that the in-dash stock boost gauge needle moves up to about the half-way mark and stays there when you turn the ignition key on.
  
 Try to get ECMLink to connect to the ECU before trying to start the engine. ​ This will help greatly in your debugging efforts, if they are needed. ​ If you can get ECMLink to connect, you will have not only confirmed 100% that the ECU is up and running OK, but you can also start some basic checks before the engine even turns over.  Start an ECU stream (ECU->​Stream on) and check that intake temp, coolant temp, TPS, etc., all make sense. ​ For example, if you see stuff like -40F for intake temp, then you may have a [[BlownSensorGround]]. Try to get ECMLink to connect to the ECU before trying to start the engine. ​ This will help greatly in your debugging efforts, if they are needed. ​ If you can get ECMLink to connect, you will have not only confirmed 100% that the ECU is up and running OK, but you can also start some basic checks before the engine even turns over.  Start an ECU stream (ECU->​Stream on) and check that intake temp, coolant temp, TPS, etc., all make sense. ​ For example, if you see stuff like -40F for intake temp, then you may have a [[BlownSensorGround]].
newenginewontstart.txt ยท Last modified: 2024/03/15 11:16 (external edit)