General GM Chat When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made. Chat about all things GM (and related cars). Off-topic stuff should be in the Lounge, and all Model specific mechanical problems should be posted in the proper forum.

Fuel injector pattern.

Old Jan 14, 2007 | 04:45 PM
  #1  
Mike's Avatar
Thread Starter
Retired
Certified Car Nut
 
Joined: Jul 2003
Posts: 17,960
Likes: 1,839
From: Dark Side, AZ
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default Fuel injector pattern.

Took my fuel rail off along with the injectors.(part of another project I'm doing)

Made a home brew pump, connected a 12V supply and tested each injector. How come the injectors spray 4 streams of fuel instead of like a fine mist spray or something? Wouldn't the fine spray mix with the air better than a stream of fluid?
Reply
Old Jan 14, 2007 | 06:05 PM
  #2  
daman's Avatar
Senior Member
Posts like a Camaro
 
Joined: Sep 2003
Posts: 1,025
Likes: 6
From: Bad Axe,MI.
daman is on a distinguished road
Default

Probably not enough fuel pressure...
Reply
Old Jan 14, 2007 | 06:30 PM
  #3  
95naSTA's Avatar
Senior Member
True Car Nut
 
Joined: Feb 2003
Posts: 4,508
Likes: 2
From: Philly
95naSTA is on a distinguished road
Default

Definitely the fuel pressure and the injectors are only open for milliseconds at a time.
Reply
Old Jan 15, 2007 | 06:21 PM
  #4  
markwb's Avatar
Senior Member
True Car Nut
 
Joined: Oct 2002
Posts: 2,703
Likes: 0
From: Groton, CT _NEBF 05, 06, 07_
markwb is on a distinguished road
Default

Agree with 95na. You're hitting the injector with constant 12vdc. Normally, the injectors are pulsed with a PWM signal. (PCM switches injector ground in & out at high frequency)
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Nighthwk12
Mechanical
0
Feb 19, 2011 07:10 PM
Hal
1992-1999
2
Jun 4, 2003 08:27 PM
Heath
1992-1999
7
Feb 9, 2003 11:26 AM


Thread Tools
Search this Thread

All times are GMT -4. The time now is 12:28 PM.