HELP!!! New build evo 8 2.4 cranks won’t start tried everything
EvoM Community Team Leader
Joined: Aug 2005
Posts: 5,690
Likes: 708
From: West Coast
if the cam sensor was bad you wouldn't get spark. If it was me i would verify +12 Volts at each injector plug with the ignition key on. The ECU is active low so it sends ground to the injectors to activate them. If you are getting 12volts at the injectors then next step is to test continuity from injector pigtail to ecu, if thats good then check ECU grounds, if thats good then likely the issue is with the ECU. Can you connect to the ecu and do you see RPM and Injector Pulse Width when your cranking? You can also put a timing light on the motor and you should be at 5 degrees BTDC while cranking.
Evolved Member
Joined: Mar 2014
Posts: 816
Likes: 82
From: wisconsin
I give up. I suck at finding things in the service manual. Lol
If the injectors are not clicking while engine is cranking, I'd check the power for positive 12V first. If +12V is there, then track the signal side, which goes to resistor pack and then ECU.
If the injectors are not clicking while engine is cranking, I'd check the power for positive 12V first. If +12V is there, then track the signal side, which goes to resistor pack and then ECU.
Thread Starter
Newbie
Joined: May 2016
Posts: 31
Likes: 1
From: edmonton
They are brand new injectors I scaled them and did the latency. I got the numbers from deatchwerk website couldn’t find any numbers on here for it. I’m going to check the resistors today and check the voltage at the injectors see if it is 12v and recheck all the grounds.
Thread Starter
Newbie
Joined: May 2016
Posts: 31
Likes: 1
From: edmonton
The ecu loads fine every time I plug the computer into it but I’ll start at the injectors and start making my way back is the plan right now. I’ll post what I find hopefully some clue shows up as to what the problem is. Thanks
Thread Starter
Newbie
Joined: May 2016
Posts: 31
Likes: 1
From: edmonton
Finally figured it out the car has been in the shop for over 2 months now. They figured out that the fuel pump was not getting enough pressure the fire the injectors so we replaced the walbro 255 I had with a better pump and it fired just fine. Thanks for all the help appreciate it lots.
Finally figured it out the car has been in the shop for over 2 months now. They figured out that the fuel pump was not getting enough pressure the fire the injectors so we replaced the walbro 255 I had with a better pump and it fired just fine. Thanks for all the help appreciate it lots.
Thread Starter
Newbie
Joined: May 2016
Posts: 31
Likes: 1
From: edmonton
Car sat for a long time and there was rust starting to form in the tanks as well. Cleaned and fixed the tank new pump and it started no problem.
Thread
Thread Starter
Forum
Replies
Last Post
Evo8Emperor
Evo Engine / Turbo / Drivetrain
52
Sep 29, 2017 03:17 PM
joel(PA)
Evo Engine / Turbo / Drivetrain
23
Mar 25, 2011 10:26 AM
NightEVO
Evo Engine / Turbo / Drivetrain
21
Oct 30, 2006 03:41 AM
