Notices
924/931/944/951/968 Forum Porsche 924, 924S, 931, 944, 944S, 944S2, 951, and 968 discussion, how-to guides, and technical help. (1976-1995)
Sponsored by:
Sponsored by:

Pulling injectors to send out for cleaning...anything I'm missing?

Thread Tools
 
Search this Thread
 
Old 06-26-2008, 02:58 PM
  #1  
Wipeout
Not Special
Rennlist Member
Thread Starter
 
Wipeout's Avatar
 
Join Date: Dec 2006
Location: Rosaria, Cascadia
Posts: 2,616
Likes: 0
Received 3 Likes on 2 Posts
Default Pulling injectors to send out for cleaning...anything I'm missing?

Headed out of town and figured it was a perfect time to pull my injectors and send them off to Witchhunter. Luckily I can drive the wife's car while mine's sitting in the garage!

Based on reading previous posts and the Clark's write-up, here are my steps...

1. Grab a beer
2. Take off plastic surround of fuel rail
3. Loosen nut on fuel rail to depressurize rail, don't lose ball bearing (I take it the nut doesn't come off?)
4. Wiggle rail, then pull it up and out.
5. Disconnect those funky square clips
6. Pull injectors off rail
7. Bag and pack injectors, mail to Witchhunter.
8. Have another beer.
9. Wait for schwank, have another beer.
10. Have beer with schwank.

Am I missing anything?
Old 06-26-2008, 03:12 PM
  #2  
MAGK944
Nordschleife Master
 
MAGK944's Avatar
 
Join Date: Jun 2007
Location: Palm Beach, Florida
Posts: 6,769
Received 298 Likes on 231 Posts
Default

Originally Posted by Wipeout
Headed out of town and figured it was a perfect time to pull my injectors and send them off to Witchhunter. Luckily I can drive the wife's car while mine's sitting in the garage!

Based on reading previous posts and the Clark's write-up, here are my steps...

1. Grab a beer
+1

2. Take off plastic surround of fuel rail
+1 Take extra care to not break any of the plastic clips.

3. Loosen nut on fuel rail to depressurize rail, don't lose ball bearing (I take it the nut doesn't come off?)
No need to take the nut off (BTW it does come off all the way but it requires some force to initially remove it and you may damage your fuel rail trying).
Just remove the fuel pump relay and turn the engine over to depresurize the system. Either way make sure you have some rags handy to catch fuel spillage and don't do it with the engine hot.


4. Wiggle rail, then pull it up and out.
+1, sometimes requires more than a wiggle.

5. Disconnect those funky square clips
+1 if they are still fitted. They are sometimes forgotten and really not required, so people leave them off.

6. Pull injectors off rail
+1

7. Bag and pack injectors, mail to Witchhunter.
+1

8. Have another beer.
+2

9. Wait for schwank, have another beer.
+3

10. Have beer with schwank.
+4

Am I missing anything?
Mike
Old 06-26-2008, 03:17 PM
  #3  
Wipeout
Not Special
Rennlist Member
Thread Starter
 
Wipeout's Avatar
 
Join Date: Dec 2006
Location: Rosaria, Cascadia
Posts: 2,616
Likes: 0
Received 3 Likes on 2 Posts
Default

So if I pull the relay I burn the fuel in the lines off, then she dies, then I skip straight to pulling the rail...interesting.

Didn't drive the car today and therefore am not worried about the engine being hot.
Old 06-26-2008, 03:21 PM
  #4  
Spidey944
Rennlist Member
 
Spidey944's Avatar
 
Join Date: Aug 2007
Location: Phoenix, AZ
Posts: 3,481
Likes: 0
Received 4 Likes on 4 Posts
Default

You will still spill fuel regardless.
Old 06-26-2008, 03:23 PM
  #5  
MAGK944
Nordschleife Master
 
MAGK944's Avatar
 
Join Date: Jun 2007
Location: Palm Beach, Florida
Posts: 6,769
Received 298 Likes on 231 Posts
Default

Originally Posted by Wipeout
So if I pull the relay I burn the fuel in the lines off, then she dies, then I skip straight to pulling the rail...interesting.

Didn't drive the car today and therefore am not worried about the engine being hot.
Yep, or you can pull fuel pump fuse #34 with the engine running and wait til it dies.
Old 06-26-2008, 03:28 PM
  #6  
Wipeout
Not Special
Rennlist Member
Thread Starter
 
Wipeout's Avatar
 
Join Date: Dec 2006
Location: Rosaria, Cascadia
Posts: 2,616
Likes: 0
Received 3 Likes on 2 Posts
Default

Oh I expected to spill some fuel. Clean rags are ready.
Old 06-26-2008, 03:40 PM
  #7  
75ohm
Resistance is Futile
Lifetime Rennlist
Member
 
75ohm's Avatar
 
Join Date: Apr 2005
Location: Tampa, FL
Posts: 7,805
Received 131 Likes on 88 Posts
Default

Extinguish cigar, cigarette, or cat that you set on fire, prior to doing this work.
Old 06-26-2008, 05:53 PM
  #8  
87944turbo
Rennlist Member
 
87944turbo's Avatar
 
Join Date: Oct 2004
Location: Hoosierville
Posts: 2,188
Received 30 Likes on 21 Posts
Default

1. Grab a beer
Yep
2. Take off plastic surround of fuel rail
Why? If all your doing is removing injectors I don't see why you would do this and I don't recall ever doing it for any reason.
3. Loosen nut on fuel rail to depressurize rail, don't lose ball bearing (I take it the nut doesn't come off?)
Like the other guy said, pull fuel pump fuse #34 with the engine running and wait til it dies. Usually a good idea to disconnect the battery at this point.
4. Wiggle rail, then pull it up and out.
Might have to wiggle really hard if you don't remove the four 10mm bolts holding the rail to the cam tower (2) and intake manifold (2). I would remove these first! Unless the early rails are different you should have these.
5. Disconnect those funky square clips
At this point I would remove the electrical connectors from each of the injector and then remove the square clips.
6. Pull injectors off rail
Yep, and be ready for some fuel spillage
7. Bag and pack injectors, mail to Witchhunter.
8. Have another beer.
9. Wait for schwank, have another beer.
10. Have beer with schwank.
Old 06-26-2008, 07:41 PM
  #9  
schwank
Herr Unmöglich
Rennlist Member
 
schwank's Avatar
 
Join Date: Sep 2004
Location: Portland
Posts: 5,402
Likes: 0
Received 2 Likes on 2 Posts
Default

Mmmm, beer.
Old 06-26-2008, 07:46 PM
  #10  
Lizard944
Rennlist Member
 
Lizard944's Avatar
 
Join Date: Aug 2001
Location: Erie, PA/ Bethel Park, PA (Pittsburgh)
Posts: 672
Received 7 Likes on 7 Posts
Default

I would add; Make sure you completely remove your spark plug wires and make sure they're clear of the rail before you yank it out. I ripped out my #2 wire from the sudden release of the injectors from the intake.
Old 06-26-2008, 08:33 PM
  #11  
theedge
Addict
Rennlist Member
 
theedge's Avatar
 
Join Date: Aug 2003
Location: Canada, Eh?
Posts: 14,242
Likes: 0
Received 3 Likes on 3 Posts
Default

Originally Posted by Wipeout
So if I pull the relay I burn the fuel in the lines off, then she dies, then I skip straight to pulling the rail...interesting.

Didn't drive the car today and therefore am not worried about the engine being hot.
Yes pull the relay out, crank car over for 5 or 10 seconds. No more pressurized fuel, still dribbles but doesnt spray.

You dont have to remove the plastic cover.
Old 06-26-2008, 09:36 PM
  #12  
cb951
Rennlist Member
 
cb951's Avatar
 
Join Date: Oct 2006
Location: Northern NJ
Posts: 336
Likes: 0
Received 0 Likes on 0 Posts
Default

Just got mine back from WitchHunter. I sent them out Priority mail last Thursday, and got them back the following Wednesday (yesterday). Really fast turnaround. I prepped, taped, and painted them last night, and they're ready to install today, just a week after I sent them.
Old 06-26-2008, 09:58 PM
  #13  
Wipeout
Not Special
Rennlist Member
Thread Starter
 
Wipeout's Avatar
 
Join Date: Dec 2006
Location: Rosaria, Cascadia
Posts: 2,616
Likes: 0
Received 3 Likes on 2 Posts
Default

Wow, not even a 1 beer job... Just wasn't expecting quite that much fuel to come out. I'll have to remember to go out and grab all those soaked rags this evening...
Old 06-26-2008, 10:28 PM
  #14  
schwank
Herr Unmöglich
Rennlist Member
 
schwank's Avatar
 
Join Date: Sep 2004
Location: Portland
Posts: 5,402
Likes: 0
Received 2 Likes on 2 Posts
Default

Told you.



Quick Reply: Pulling injectors to send out for cleaning...anything I'm missing?



All times are GMT -3. The time now is 09:54 PM.