Am i Digi 1 or Digi 2???

[gordinho80]

how can i tell if my 90 cabbie is digi 1 or digi 2???

what can i look at to tell? would the VIN give it away?

thanks...

[vwdois]

Quote, originally posted by gordinho80 »

how can i tell if my 90 cabbie is digi 1 or digi 2??? what can i look at to tell? would the VIN give it away? thanks...

I Think it's like this: if your fuel injector only have 2 wires (brown and red) it's a digi 2 if it have more than that is a digi 1 .

Digi 1 it's only for California car's

In Portuguese now:

penso que a diferença entre digi 1 e digi 2 é que o digi 1 controla individualmente cada injector e que só saiu na California, devido às restrições ambientais.

É bom ver alguem neste forum que também e de Portugal.

[gordinho80]

thanks for the quick reply...i will take a look, where is my fuel injector?

[vwdois]

Quote, originally posted by gordinho80 »

thanks for the quick reply...i will take a look, where is my fuel injector?

in the back side of the engine head, there is 4 injector

[netarc]

Also, I noticed that my ECU (near firewall, driver side) was labeled DF-1, meaning Digi1 (92 Cabriolet). Presumably Digi2 ECUs will be labeled DF-2, then?

Check out the pix of my ECU here for reference:
http://forums.vwvortex.com/zerothread?id=1307297

[Black_cabbie]

Both of them say DF-1 but both of them are Digi2.

The pins are different in digi1 ECU.

[exboy99]

now you guys have me thinking.... I'd better
check and see... I'm sure I"m Digi I
but my car in in NY..... how could this be
did my engine swap and parts come all
the way from the golden state?

I'll report back... and a pic of the injectors....
just in case you weren't kidding.
... yes I'm embarassed of how cruddy
it is in there but .... well here's the pic
the injectors are under the guly square
metal rail with the paint flaking off of it.... and all
the mess of wires under it....

[exboy99]

well I just looked an my ECU case says I'm Digi II!

how'd I get that wrong?

hmmmm.

[kamzcab86]

Quote, originally posted by exboy99 »

how could this be did my engine swap and parts come all the way from the golden state?

Considering my '86 was bought in SoCal in '89 but was originally bought off a VW dealer lot in New York back in '86.... it's quite possible

Remember, 1990 model-year Cabriolets sold in California have Digifant II with unique features and specifications. Beginning in 1991, Cabriolets sold in California have Digifant I. All other 1990-1993 Cabriolets have Digifant I.

[exboy99]

Sadly I'm digi II

I'm still learing about what's better digi this or that
and it seems that the 16v forum is torn.
many of em are on digi 2 or taht Cis-e
and some are Digi I

I understand that Digi I has a less restrictive
or maybe No MAF on it? At least the story seems
to be that the Digi II suffers with some limitations
like the intake with it's restrictive airflow sensor thing.
and something like digi I can't run a forced induction
setup... but digi I can? sigh.... so much to learn
but I'm soo sleepy must sleeeeep.

[exboy99]

Both of them say DF-1 but both of them are Digi2.

.... well that is what mine looks like.....

go take a look... that's what I did... and what a surprise!

[Black_cabbie]

So you should have knock sensor, 02 sensor and cat on your car as well right? Do you know if somebody did a custom map on the fuelling for this engine?

[exboy99]

well I think there's an O2 sensor somewhere down there.....

Im pretty sure there's a cat but I only peek at bits of my
exhaust and seeing how I forgot if I was dig I or II
I'd better go check before I say anything about my car!

ay-yay-yay!

I'm thinking aboot performance chips though.... since
I think I can slip on in there.... she's pretty quick
but couldn't she be a little faster? I bet she can.

[netarc]

Quote, originally posted by kamzcab86 »

All other 1990-1993 Cabriolets have Digifant I.

You mean "have Digifant II," right?

[honkey]

i'm curious about this too. i have a 93 cabby and i always read that the 93 was digi 2.

[s2kvondeutschland]

Most 90-93's are Digi II, unless it was an original Cali car, or swapped to Digi I during it's life.

Just check the ECU, it'll say.

[tolusina]

DigiFant I, boxy, transformer looking coil with integral power stage; DigiFant II, old school looking cylindrical coil.
DigiFant I, throttle position SENSOR (variable resistance); DigiFant II, two throttle position SWITCHES (on/off devices).
DigiFant I, check engine light on the dash ; DigiFant II, no CEL.
DigiFant I, 38 pin ECU ; DigiFant II, 25 pin ECU.
DigiFant I, 5 wires in the injector harness near the fuel rail, separate circuits for each injector plus one common; DigiFant II, 2 wires, injectors all wired in parallel on the same circuit.

I think there are a few other differences, these are all that come to mind right now. There are plenty visual clues here for an owner to identify which system is on their car.

Note that this info is about bass ackwards regarding G60 (supercharged, nor factory on Cabbys) Digi I and II, I gets me a headache when I try thinking about those variations.

[s2kvondeutschland]

DigiFant I, boxy, transformer looking coil with integral power stage; DigiFant II, old school looking cylindrical coil.
DigiFant I, throttle position SENSOR (variable resistance); DigiFant II, two throttle position SWITCHES (on/off devices).
DigiFant I, check engine light on the dash ; DigiFant II, no CEL.
DigiFant I, 38 pin ECU ; DigiFant II, 25 pin ECU.
DigiFant I, 5 wires in the injector harness near the fuel rail, separate circuits for each injector plus one common; DigiFant II, 2 wires, injectors all wired in parallel on the same circuit.

I think there are a few other differences, these are all that come to mind right now. There are plenty visual clues here for an owner to identify which system is on their car.

Note that this info is about bass ackwards regarding G60 (supercharged, nor factory on Cabbys) Digi I and II, I gets me a headache when I try thinking about those variations.

Any idea why the naming was all screwy, why there are two different versions of Digi. or why the Cali cars had them? Was it really that much cleaner running?

[honkey]

DIGI 2 for me then. i have no cel light and a normal cylinder style coil.

[euroteknique]

whats the difference between cali digi-1 and g60 digi-1 I know the difference between digi-1 and 2
but not the cali digi-1
digi-1 is map based not maf

[briano1234]

All other 1990-1993 Cabriolets have Digifant I.

Not quite, My 90 was Digifant II and my 92, and 93 are DigifantII but then again are you talking Californiated cars or FreeUSA.

The easist way to tell is if you have a old fashioned looking coil, or a coil pak on the firewall.
Coilpack Digi I old timey Digi II

[tolusina]

whats the difference between cali digi-1 and g60 digi-1 I know the difference between digi-1 and 2
but not the cali digi-1
digi-1 is map based not maf

I told I get a headache About Digi I, II, NA and G60.
Best I know, which may be completely wrong, G60 I = NA II as far as ECU pins etc.. I'm pretty sure all G60 versions use a MAP, CO pot, etc., etc..

NA DigiFant I & II both use a MAF, no MAP at all. Confused yet? I am.

[kamzcab86]

Not quite, My 90 was Digifant II and my 92, and 93 are DigifantII but then again are you talking Californiated cars or FreeUSA.

The easist way to tell is if you have a old fashioned looking coil, or a coil pak on the firewall.
Coilpack Digi I old timey Digi II

Check the post date: 2004. I got that info out of the Bentley.

Cabby Info now says:
"Digifant is Volkswagen's in-house variant of the Bosch L-Jetronic fuel management system. There are two types: Digifant I and Digifant II. Digifant I uses adaptive controls to comply with California emissions requirements and has OBD I diagnostics. Digifant I was installed only in Cabriolets initially sold in California; all other Cabriolets use Digifant II.

Additional info: If the 5th digit in the VIN is "B" it's Digifant II, if it's "C" it's Digifant I and should have a check engine light on the dash."

[tolusina]

Any idea why the naming was all screwy, why there are two different versions of Digi. or why the Cali cars had them? Was it really that much cleaner running?

VW Screwy Naming™? You mean like why an A1 Golf was a Rabbit in the U.S., Caddys were never sold in the U.S. as Caddys, rather, Pickups ('Pickups', their body stamping dies etc. first made and used in the U.S.), Cabrios are A3s in the U.S., A1 Golf Convertibles are Golf Cabrios in Europe.
VW likes to confuse end users with VW Screwy Naming™, that must be why.

California required On Board Diagnostics before the lagging rest of the States, California does sometimes take the lead in good things, pretty often actually, never mind that California also leads in Nanny State implementations.
Since CA cars had to have OBD, VW likely decided to use most of the rest of the next generation of technical advances short of a full switch to Motronic.

As Digi II injectors are all wired in parallel, there's no way for computer diagnostics (on, or off board) to isolate individual injectors for open/short monitoring or cylinder disabling. Digi I has individual circuits for each injector making isolation possible, it even allowed for sequential injection though I don't think Digi I went quite that far though Motronic (some versions at least) most likely did.

Sequential injection is actually a very small increment in engine power and fuel efficiency.
Consider how well CIS worked with fuel being constantly sprayed on intake valves, open or closed, the real time that fuel sat waiting for a valve to open being very very short.
Digi II (along with all earlier versions of L-Jetronic, and probably Digi I) also pulse sprayed fuel on closed and open valves, no big gain from pulsing rather than spraying there either.
D-Jetronic, the very first mass produced EFI at least pulsed alternating injector pairs, they obviously found little or no gain there because they abandoned that beginning with L-Jetronic.

[tolusina]

..... Digifant I uses adaptive controls to comply with California emissions requirements.....

And there you go, I had forgotten (I'm old, forgetting is allowed, even expected) about the adaptive business.

Once again, Kamz 1, Ron 0.