how to change a injector?? - Blazer Forum - Chevy Blazer Forums

2nd Gen S-series (1995-2005) Tech Discuss 2nd generation s-series (1995-2005) general tech topics here.

Closed Thread
Thread Tools Search this Thread
Old 02-03-2012, 12:07 AM
Beginning Member
Thread Starter
Join Date: Jan 2011
Posts: 26
tim68 is on a distinguished road
Default how to change a injector??

I have a 02 blazer with a 4.3 it has a misfire on #1 cyl, I need to change the injector on that cyl. I was wondering how hard it is to do.
Old 02-03-2012, 12:14 AM
Rottidog's Avatar
BF Veteran
Join Date: Sep 2008
Location: Winnipeg, Manitoba
Posts: 2,523
Rottidog has a spectacular aura aboutRottidog has a spectacular aura about

Do a search for spyder assembly removal or play with the wording of the search. You don't have "A" injector, it's what's called a spyder assembly. Basically one injector that feeds 6 tubes with electric poppet valves at the end of each tube. They are what inject fuel into the cylinders.
How do you know for sure the misfire is because of the injector? Read any DTC's in the PCM?

Search around I'm sure you'll find your answer & probably more questions that need to be answered or figured out before removing the manifold to replace the spyder.
Old 02-03-2012, 12:48 AM
neo71665's Avatar
Super Member
Join Date: Dec 2007
Location: rison AR
Posts: 1,940
neo71665 will become famous soon enoughneo71665 will become famous soon enough

Lmao, you better hope its not the injector.
Old 02-03-2012, 11:20 AM
New Member
Join Date: Apr 2011
Posts: 69
juanfpina is on a distinguished road

If it's a misfire it could be a number of things...
It might be the spark plugs or wires, it could also be a vacuum leak which is what cause my misfire. What makes you so sure it's the injector?
Old 02-06-2012, 11:30 AM
mrkevinmjr's Avatar
Junior Member
Join Date: Apr 2008
Location: I go where my truck takes me...
Posts: 275
mrkevinmjr is on a distinguished road

dude i dis searches for spider injector replacement and did it in the street 1 2 3. it took a few hours and painted my upper intake manifold and plastic intake body orange, had a few smokes, stared at a few chix... and done.. easy... trust me it looks scaries then it truely is

all it is is undo this hose unbolt that and done.. get the ac delco or delphi spider kit and new gaskets... also engine primer and paint.. looks bad ***. need a lil grease cause when u put it back together the plannum will be a lil tough.. ull also need crows foot... and a few beers.
Old 02-06-2012, 12:57 PM
Chuk Rhodes's Avatar
New Member
Join Date: Aug 2010
Location: Napa, CA
Posts: 74
Chuk Rhodes is on a distinguished road

I rebuilt, or really just cleaned, my spider assembly. It was scary, but it still works. Remove two nuts and the plate on the bottom of it, and they press out. It takes a LOT of force, and it's mostly plastic. But with a ground down screwdriver, it wasn't the hardest thing I've done. It will just be expensive if you break it!

Once opened, there was some debris to clean off the filter screens. This is also where the fuel pressure regulator is, has another filter screen that gathered junk.

I got into it due to the code "Random or Multiple Cylinder Misfire", didn't seem to help, but glad I did it after seeing the screens. Turned out to be distributor related on that code.
Old 02-06-2012, 02:44 PM
neo71665's Avatar
Super Member
Join Date: Dec 2007
Location: rison AR
Posts: 1,940
neo71665 will become famous soon enoughneo71665 will become famous soon enough

Fixing the problem isn't an issue if you can turn a wrench, its the price of the pos.
Closed Thread

Related Topics
Thread Thread Starter Forum Replies Last Post
ATF - To Change or Not to Change Hormisdas Engine & Transmission 15 11-27-2012 09:42 PM
97 bravada not starting after fuel injector change bravada97 Engine & Transmission 0 03-13-2012 01:58 AM
4.3 CPI "W", pictures of replacement process for injector 93LT 1st Gen S-series (1983-1994) Tech 45 11-13-2010 06:13 PM
Proper Fuel Injector cleaning methods? 00ZR2BLZRGUY Engine & Transmission 4 11-21-2005 11:33 PM
Runnin' on one injector... FieroBob 1st Gen S-series (1983-1994) Tech 2 06-12-2005 10:52 PM

02, 1997, 2000, 43, 97, blazar, blazer, change, chevy, clean, injector, injectors, o3, remplaceinjector, replace

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Featured Sponsors
Vendor Directory

All times are GMT -5. The time now is 12:19 PM.