- i've done injectors at least 3X on L98's. it always amazed me just how much fun i was having... 
Removing Plenum
Thread Starter
Instructor
Joined: Apr 2011
Posts: 208
Likes: 0
From: Trophy Club Texas
Removing Plenum
I will be removing my plenum to replace EGR, MAT, and probably injectors. I will inspect the fuel regulator while I am there.
What other common tasks should I conquer since I will aleady be in the neighborhood?
I read some say to replace the themostat since its right there.
Also, tips to clean all the intake and TB.
Should I port/polosh or no?
What other common tasks should I conquer since I will aleady be in the neighborhood?
I read some say to replace the themostat since its right there.
Also, tips to clean all the intake and TB.
Should I port/polosh or no?
Racer
Joined: Sep 2010
Posts: 327
Likes: 2
From: se iowa
I would check the condition of your oil pressure sending unit stuff. New injectors was one of the best things I had done to my car prior to redoing the top end. Might not hurt to eyeball your wiring connectors by the firewall behind the plenum and check to see if your tach wire is ready to fall off the distributor.
Race Director
Joined: Jun 2004
Posts: 13,895
Likes: 691
From: WI
You don't need to remove or loosen any bottom runner bolts to remove the plenum. So it really is fun, pretty quick as well. Pop a few injectors out to make getting the rails out easier with the runners still on.
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Thread Starter
Instructor
Joined: Apr 2011
Posts: 208
Likes: 0
From: Trophy Club Texas
I hope so... I just ordered a matched flow set of bosch III's. I figure since I'll already be in the neighborhood, I might as well do it all. Don't feel like taking this Plenum off more than I need to.
Racer
Joined: Nov 2010
Posts: 476
Likes: 4
Thread Starter
Instructor
Joined: Apr 2011
Posts: 208
Likes: 0
From: Trophy Club Texas
Yes, I did get them from FIC. I didn't mention the name before because I didn't know if it would violate any forum rules.
The injectors are supposed to come with the O Rings on them from what I understood.
I bought new O-Rings for the Fuel Rail assembly and I also have the Plenum Gaskets (Upper/Lower/TB/Etc.)
Valve Seals? You mean Valve Cover Seals? I thought about doing those. Maybe replace the valve covers with Edlebrock to dress it up a bit.
Racer
Joined: Nov 2005
Posts: 310
Likes: 47
I replaced the EGR the same time I replaced the fuel injectors on my 1990. My friend, who is a professional mechanic, did most of the work. Before he swapped out the EGR, he sprayed a ton of carb cleaner into the EGR valve opening several times and used a wire hanger to clean it out. He said that it needed it as a bunch of black stuff came out. He also asked me for an old magazine. He used balled up pages of the magazine to stop up the ports so that nothing fell into the engine while it was being worked on. He also checked the OHM readings on the new injectors to make sure that none were defective. He would not have done that unless he has seen bad injector or two right out of the box in his time. You may want to check your new ones before use for piece of mind.
Last edited by summerst; Feb 8, 2012 at 04:27 PM. Reason: typo
Racer
Joined: Nov 2005
Posts: 310
Likes: 47
That is good to hear. Just in case, it only takes a few minutes to check again. FIC may be guaranteeing the injectors but paying to swap out a bad injector is on your dime.
Last edited by summerst; Jan 17, 2012 at 06:23 PM. Reason: typo
