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9dreizig's Avatar
 
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Time for a fuel head rebuild ?? Anybody with EFI have a spare one I can borrow ??
T
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"Todd"
98 Tahoe ,2007 Saturn Vue
86 930 black and stock, 80 930 blue tracdog
91 Spec Miata (yeah I race a chick car)
"life"ll kill ya" Warren Zevon
Old 11-28-2009, 03:15 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #21 (permalink)
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Quote:
Originally Posted by 9dreizig View Post
Ok cute blonde just came over,, started it up control pressure slowly climbed into the 2's had her bleep it to 3000 rpm control pressure didn't blink but the AFR's went to 10 and change..

Mooney, does this point to the plunger in the fuel head ??
Well, that all depends on just how "cute" the blonde is??? Actually, what it does show is the WUR seems to be working correctly...

I'm not too sure what it points too... There are more much qualified persons around here who can answer that one... sorry
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LIVN80S - - Red '79 Porsche 930 Steel Slant Nose Conversion [in 1987] w. 46k miles 3.3L; 964 Cams; K27HF @ 1.0 BAR, with Garrettson Intercooler; Rarly Zork; CIS Flowtech Fuel Head & BL-WUR.
Old 11-28-2009, 04:12 PM
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Anybody else have any ideas? Fuel head ?? Should I try to re-build it or spend the $500 on a newly rebuilt one ? Anybody have a spare ?
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"Todd"
98 Tahoe ,2007 Saturn Vue
86 930 black and stock, 80 930 blue tracdog
91 Spec Miata (yeah I race a chick car)
"life"ll kill ya" Warren Zevon
Old 11-29-2009, 07:47 AM
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If you rebuilt the recirculation valve, the fuel head should present no problem for you as long as you can find a rebuild kit.

Before I would do that tho' I would run a can of Techroline or Sea Foam through the fuel system. It can be remarkable what that stuff can do. And the cost is miniscule compared to rebuilding or replacing the fuel head.

Good Luck,
Mark
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Old 11-29-2009, 07:56 AM
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Thanks Mark, I've done a little more reading and some guys are talking about just concentrating on the plunger.. maybe a partial rebuild ?
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"Todd"
98 Tahoe ,2007 Saturn Vue
86 930 black and stock, 80 930 blue tracdog
91 Spec Miata (yeah I race a chick car)
"life"ll kill ya" Warren Zevon
Old 11-29-2009, 08:02 AM
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Todd, you may want to peruse this:
CIS fuel distributer cleanout w/pics

I rebuilt on of my SC heads to try and get some more oomph out of it (IA did the other head I use)
Pat
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Old 11-29-2009, 08:51 AM
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I too think this may be the piston which is why I asked if the AFRs would recover if the trottle was left at 4000rpm sustained. This would indicate a slow or sticking piston.

You might remove the head and bathe the piston in carb cleaner then wipe down with a soft cloth.

Sorry I didn't get your call, the cell phone is sitting on the dresser and we've had company all weekend.
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Old 11-29-2009, 09:56 AM
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Brian, one more tidbit of info.. I did notice last time I drove it, I seemed to get much better AFRs running in 3rd at 3300 rpm than 4th at 2000 something RPM.. and AFR's seem to be a slow recovery rather than a quick one.
Now to figure out how to remove just the plunger..
Gotta do some traveling and them move at the end of the month so may be a while before I can jump into this again.
T
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"Todd"
98 Tahoe ,2007 Saturn Vue
86 930 black and stock, 80 930 blue tracdog
91 Spec Miata (yeah I race a chick car)
"life"ll kill ya" Warren Zevon
Old 11-29-2009, 10:02 AM
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Pat , great thread,, scared the hell out of me!!
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"Todd"
98 Tahoe ,2007 Saturn Vue
86 930 black and stock, 80 930 blue tracdog
91 Spec Miata (yeah I race a chick car)
"life"ll kill ya" Warren Zevon
Old 11-29-2009, 10:12 AM
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Hey guys I took my fuel head into Fuel Injection Corporation in Livermore today. They put it on the test stand and it's perfect!!! Back to the drawing board!!! Will put it back on Friday or Sat and I'm sure will need your help..
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"Todd"
98 Tahoe ,2007 Saturn Vue
86 930 black and stock, 80 930 blue tracdog
91 Spec Miata (yeah I race a chick car)
"life"ll kill ya" Warren Zevon
Old 03-30-2010, 05:47 PM
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