User Tools

Site Tools


newenginewontstart

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Last revision Both sides next revision
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
 +
  
  
 ===== 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: 2012/01/31 11:26 by dmertz