CIS fuel distributor

  • Thread starter Thread starter James Sweet
  • Start date Start date
J

James Sweet

I wound up pulling apart the fuel distributor on the '79 242 I posted
about earlier with the no start condition. I know you're not supposed to
open them but upon disassembly my suspicion was confirmed that I had
nothing to lose. Inside I found quite a pile of rusty sediment and other
various crud, though no real damage and it cleaned up fine without too
much effort.

Now the question is do I attempt to reassemble it and put it back on the
car or should I just grab another one from the wrecker? Has anyone
successfully put one of these back together or is it like a hard drive
in a computer and just so ridiculously precise that I have no hope?
 
James said:
I wound up pulling apart the fuel distributor on the '79 242 I posted
about earlier with the no start condition. I know you're not supposed to
open them but upon disassembly my suspicion was confirmed that I had
nothing to lose. Inside I found quite a pile of rusty sediment and other
various crud, though no real damage and it cleaned up fine without too
much effort.

Now the question is do I attempt to reassemble it and put it back on the
car or should I just grab another one from the wrecker? Has anyone
successfully put one of these back together or is it like a hard drive
in a computer and just so ridiculously precise that I have no hope?
Click to expand...

Jim...
I've done it before and what do you have to lose? Put it back together
and see what happens, OK? It really doesn't take too long to reassemble
the unit if you have kept everything in order. If it doesn't work, then
I'd get a rebuilt unit because if you get a used component, you just
might have the same problem with all of the sediment and buildup.
 
I'm sure how far you took it apart, but I know they are designed to be
disassembled, as you can add shims to modify the pressure.

Clean it up with carb cleaner, make sure there are no obstructions to
the slits, and go for it: what have you got to lose?

FWIW, here's a link you might enjoy.

http://www.volvoclub.org.uk/tech/fuel_injection/k_jetronic.shtml
Click to expand...
OK, here's the problem...
In the "REAL" Volvo manuals, it states that K Jetronic is the electronic
fuel injection system, not used on turbos whth the fuel distributor.
Sorry, but the fuel distributor was not used with the electronic F.I.
engines. The Website quoted is wrong, period! The fuel distributor, as
pictured, and as I have on my old '84 turbo, is for NON electoronic
systems WITH turbo. Turbos have a mechanical system. NON turbos have an
electronic system with little plugs going to each injector to time them
from the ECM.
For once and all...K-Jetronic is "Electronic" with each injector being
controlled electrically. Just like my old VW squareback from
1969...there's a plug at the base of each injector. NOT so for Turbo
Engines.
 
You are wrong.

Very wrong.

This statement of yours is demonstrably inaccurate: "For once and
all...K-Jetronic is "Electronic" with each injector being
controlled electrically."

No.

Here's a good link:

http://www.auto-solve.com/mech_inj.htm

Earlier non-Turbo 240's had the K-Jet mechanical fuel injection: I
know, I owned one.

The non-Turbos switched from mechanical to electronic in the early
80's, but the Turbos soldiered on with the mechanical injection.

Oh yeah, the electronic injection?

It's called LH Jetronic.

Next time, before you deign to chastise or correct someone, get your
facts straight.

Otherwise, you look the fool.
 
You are wrong.

Very wrong.

This statement of yours is demonstrably inaccurate: "For once and
all...K-Jetronic is "Electronic" with each injector being
controlled electrically."

No.

Here's a good link:

http://www.auto-solve.com/mech_inj.htm

Earlier non-Turbo 240's had the K-Jet mechanical fuel injection: I
know, I owned one.

The non-Turbos switched from mechanical to electronic in the early
80's, but the Turbos soldiered on with the mechanical injection.

Oh yeah, the electronic injection?

It's called LH Jetronic.

Next time, before you deign to chastise or correct someone, get your
facts straight.

Otherwise, you look the fool.
Click to expand...

The first Volvo fuel injection was electronic with an analogue
computer. It was called by bosch D-Jetronic, D for Druck, German for
pressure. It measured intake manifold pressure, and used that
information along with engine speed information to calculate injection
time.

Next there was K-Jetronic. This was non-electronic, K for
Kontinuerlich, German for continuous. The injectors were always
injecting fuel when the engine was running (even when the intake valve
was closed), flow through them was varied by the fuel distributor, the
signal from a plate moving in a venturi was transferred to the fuel
distributor by a lever.
There was a variation of this KE-Jetronic that was never used by Volvo,
which basically added electronic control of the control pressure, and
thus the mixture.

Also not used by Volvo was L-Jetronic. This was electronic, L was for
Luft, German for air. Air volume was measured by a spring loaded door
in the intake flow.
Note K-,KE- and L-Jetronic measure air volume, not mass.

A variation of L was LH-Jetronic, the H for Heiss, German for hot. This
used a heated wire in the intake flow to measure air mass, not volume.
The computer calculated air flow by its cooling effect on the hot wire.

Then came various forms of Motronic, which combined fuel and ignition
systems into one computer box.

--
Mike F.
Thornhill (near Toronto), Ont.

Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)
 
Mike, I must thank you for that clear explanation of the various fuelling
systems mentioned.

All the best, Peter.

700/900/90 Register Keeper,
Volvo Owners Club (UK).
 
You are wrong.

Very wrong.

This statement of yours is demonstrably inaccurate: "For once and
all...K-Jetronic is "Electronic" with each injector being
controlled electrically."

No.

Here's a good link:

http://www.auto-solve.com/mech_inj.htm

Earlier non-Turbo 240's had the K-Jet mechanical fuel injection: I
know, I owned one.

The non-Turbos switched from mechanical to electronic in the early
80's, but the Turbos soldiered on with the mechanical injection.

Oh yeah, the electronic injection?

It's called LH Jetronic.

Next time, before you deign to chastise or correct someone, get your
facts straight.

Otherwise, you look the fool.
Click to expand...
Actually, I'd rather believe the Volvo shop manuals.
Your handle says it all.
 
"Your handle says it all."

What, "zencraps?"

It's about casino play.

C'mon, "Administrator" (a douche bag name if ever there was one), you
screwed the pooch big time on this one; just admit your error and move
on.
 
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