Injectors not opening after running out of gas - Team Camaro Tech
Troubleshooting Diagnosing problems done here.

LinkBack Thread Tools Display Modes
post #1 of 2 (permalink) Old Aug 2nd, 12, 02:18 AM Thread Starter
Join Date: Aug 2012
Location: charleston sc
Posts: 1
Question Injectors not opening after running out of gas

Hello everyone, I came here hoping to get some help with this crazy problem thats left my friends and I completely baffled.

I have a 1996 z28 camaro that ran out of gas on me on my way to the gas station. I pulled into a parking lot, and came back with 5 gallons of gas. Since running out of gas, I have not been able to start the car. I checked spark, fuel and found that the injectors do not open after the fuel pump primes. I checked my fuel pressure and its at 40, so thats good. The local autoshop ran some computer codes and told me its the opti, so I changed that and still nothing! Do these cars have some kinda sensor that might of tripped after running bone dry? A mechanic suspects bad fuel pressure upon cranking and thus the ECM not pulsing the injectors, but that sounds a little farfetched. If anyone can help out here It would really help. Thank you.

David Akter is offline  
Sponsored Links
post #2 of 2 (permalink) Old Aug 2nd, 12, 04:26 AM
Super Moderator
Bess-68's rule
Everett#2390's Avatar
Join Date: Sep 2000
Location: Va Beach VA
Posts: 31,709
Re: Injectors not opening after running out of gas

Welcome, David.

First thing I would do is remove the fuel pump relay and jumper power across the socket to turn the pump and let it run for a few minutes priming the fuel system.
Next, I would check voltage at any injector. One wire, black? will be battery voltage through a power relay for inj power after ign switch is turned to IGN. The other wire, black with a colored stripe, is controlled by the ECM and when ECM commands the inj to open, the wire goes low, maybe within 0.5 volts of ground, otherwise, battery voltage.
DO NOT ground the striped wire as it will break the ECM driver and a new/rebuilt ECM will be needed.
Use a digitial multimeter to check voltage on ECM wire as any other test instrument besides a 'noid light, will break the ECM.
ECM takes the Optispark reference and splits the signal into spark and injector pulses.
Another important point is check/clean engine grounds of all ECM devices and to battery.
Ensure battery is fully charged.
Might give the throttle plate a spray of starting fluid or WD40 to see if engine does start momentarily.
Ever crank the engine over with throttle to the floor?
Maybe others here will offer their suggestions.

Give a man a rescued dog for the health of both their souls. May 2017 ROTM Winner - Thank you!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
CUBS - 2016 World Series Champions - Thank you, Joe Madden enjoy your next chapter.
Everett#2390 is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome