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.

question about injectors.

Thread Tools
 
Search this Thread
 
Old Apr 17, 2011 | 09:33 PM
  #1  
eltatertoto's Avatar
Thread Starter
Senior Member
Certified GM nut
Certified GM nut
 
Joined: Sep 2010
Posts: 1,871
Likes: 72
From: hobart indiana (1 hr from chicago)
eltatertoto is a jewel in the rougheltatertoto is a jewel in the rougheltatertoto is a jewel in the rougheltatertoto is a jewel in the rough
Default question about injectors.

so i was trying to get the the root of why my car will randomly drop cyls 2 and 5 today and i was checking the coils because ive already replaced the plugs and wires about 6k ago. all the coilpacks were within the same area, .07ohms primary 5524ohms secondary. confirmed good by my dads car with only 70k.

anyway im thinking my next step is injectors. around the #5 injector there is a very faint smell of fuel so i figured id replace the orings on all the injectors. my question for you guys is, a) how the hell do i remove injectors (used to carbed cars) and b) should i just get a bottle of injector cleaner and seafoam or is there a way to clean the injectors with them out?

thanks alot for the help. making a second 511 mile trip each way to memphis this friday and i wasnt happy with the 28mpg avg.
Reply
Old Apr 17, 2011 | 09:49 PM
  #2  
Danthurs's Avatar
Retired Senior Admin

Expert Gearhead
 
Joined: May 2006
Posts: 29,661
Likes: 43
From: Sheboygan Wisconsin
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

If 2 and 5 are causing problems, then that'* your center coil. Swap the coils around. If the problem follows the coil, then the coil is bad. If not, then the ICM is bad.
Reply
Old Apr 17, 2011 | 09:52 PM
  #3  
eltatertoto's Avatar
Thread Starter
Senior Member
Certified GM nut
Certified GM nut
 
Joined: Sep 2010
Posts: 1,871
Likes: 72
From: hobart indiana (1 hr from chicago)
eltatertoto is a jewel in the rougheltatertoto is a jewel in the rougheltatertoto is a jewel in the rougheltatertoto is a jewel in the rough
Default

Originally Posted by Danthurs
If 2 and 5 are causing problems, then that'* your center coil. Swap the coils around. If the problem follows the coil, then the coil is bad. If not, then the ICM is bad.
well he thing is, i cant predict it lol. it just seems to start slightly harder than usual. like the first start of the day will take a little cranking but the second start regardless of time it will fire almost instantly. which makes me think fuel delivery
Reply
Old Apr 17, 2011 | 09:56 PM
  #4  
Danthurs's Avatar
Retired Senior Admin

Expert Gearhead
 
Joined: May 2006
Posts: 29,661
Likes: 43
From: Sheboygan Wisconsin
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

Check the fuel pressure, should be around 48psi with key on, and should hold that pressure for a while with key off. If the pressure drops then it'* leaking out.
Reply
Old Apr 18, 2011 | 06:51 AM
  #5  
jwfirebird's Avatar
Senior Member
True Car Nut
 
Joined: Dec 2009
Posts: 9,616
Likes: 594
From: western,ny state
jwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond repute
Default

ive put over 200k on most of my cars before the body falls apart and never replaced an injector, but ive gone through some coils. i would do what dan said its free and fairly easy and then youll know for sure.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Barry
Performance, Brainstorming & Tuning
12
Jan 9, 2008 11:20 PM
lammers
Performance, Brainstorming & Tuning
8
Jan 8, 2008 10:08 AM
Performance, Brainstorming & Tuning
14
Feb 2, 2003 04:23 AM
SSEi95
1992-1999
3
Aug 30, 2002 12:49 PM
EightSevenZero
1992-1999
6
Aug 21, 2002 08:40 AM




All times are GMT -4. The time now is 08:09 PM.