The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Electrical

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 04-27-2012, 08:02 PM   #1
automagic67
Registered User
 
Join Date: Apr 2007
Location: Las Vegas Nv
Posts: 21
lq4 cranks but won't start and I'm stumped

Hello,
I tried to start my engine for the first time yesterday. It cranked but did not start. I then sprayed starting fluid in the throttle body. It ran until the starting fluid was gone. This tells me I my ignition system is fine. Next, I checked fuel pressure. I have 50 psi at the rail. Then I pulled out 2 fuel injectors and manually made them turn on with some extra wire. They clicked on and off. Then I checked the pink(power) wires to the injectors in on and start. I have power. Finally, I checked that the ECU is grounding the other wire on the fuel injector connector with a test light. The light flashes when I crank the motor. Apparently my fuel system is fine but I still get no fuel. What could be happening? Any help would be greatly appreciated.
automagic67 is offline   Reply With Quote
Old 04-27-2012, 09:46 PM   #2
low_crew_cab
Registered User
 
low_crew_cab's Avatar
 
Join Date: Apr 2012
Location: San Antonio, Tx
Posts: 3
Re: lq4 cranks but won't start and I'm stumped

I've had the same issue before on a swap. I pulled all 8 injectors and let them soak in a bowl of Chevron Techron fuel injector cleaner overnight. The next morning i re-installed the injectors and she fired rite up. I've heard of people boiling hot water and freeing stuck injectors that away also. Hope you get it figured out but i'm pretty sure it's stuck injectors since everything else seems on par.
low_crew_cab is offline   Reply With Quote
Old 04-27-2012, 11:10 PM   #3
automagic67
Registered User
 
Join Date: Apr 2007
Location: Las Vegas Nv
Posts: 21
Re: lq4 cranks but won't start and I'm stumped

you are exactly right. I noticed when I cycled one straight off the battery it took a few times to start clicking. I reinstalled everything and it sputtered (probably with just that one injector firing) and started to run. So, IT RUNS!!! Now on to fixing the brakes and figuring out a gas pedal.
automagic67 is offline   Reply With Quote
Reply

Bookmarks

Tags
lq4, ls1, lsx, start


Posting Rules
You may not post new threads
You may not 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

Forum Jump


All times are GMT -4. The time now is 11:15 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com