fuel injection ?

[handyher]

Guys,


I have a question or two about fuel injection. I am ready now to get the engine in the car and am going through the fuel injection stuff. I have all the parts but....... my engine is a 74 1.8L block with 1.7 guts i do belive just figured out that the wiring harness and the pieces i have are LJet which is not a problem what is that the stuff i have i think is for a 2.0L any way to tell and will this work on my engine????? any and all help will be appreciated.

As my daughter says Mom that car is a love/hate relationship just like mine(hers) was. Don't I know it. but yes I will go out and sit in it and think about this summer crusing through the rookies in her. thanks again

[handyher]

that should be rockies

[jamcleod]

is your FI D-jet or L-jet? 1.7L is probably D-jet. you can tell which by presence of either manifold pressure sensor (d-jet) or air flow sensor (l-jet), of course, not presence of both.

[handyher]

FI is Ljet air flow sensor

[Dave at Pelican Parts]

I don't think I understand the question at all....

What kind of "1.7 guts" does your 1.8 motor have in it? If you mean crank and rods, those are the same between 1.7 and 1.8 motors. If you mean the pistons and cylinders, the 1.8 heads do not work very well with those unless you have some adaptors made up. If you mean pistons, cylinders, and heads, then you have a 1.7 motor built on a 1.8 crankcase.

What kind of fuel injection stuff do you have, that you want to try on this (possibly) 1.7 motor? You mention L-jet, but then say 2.0 stuff which is D-jet... If you can find the part numbers from the FI pieces, you can look up any D-jet ones on Brad Anders' web page, http://members.rennlist.com/pbanders .

We can also help you with at least some of the L-jet part numbers; there are some of us on this BBS with access to the Bosch FI catalog. It lists currently-available part numbers (and some but not all that are NLA right now).

In general, I think that 1.8 L-jet will work on a 1.7 motor, or a 1.8 motor, and I hear that it will work on a 2.0 motor but I would be scared of it running lean at high RPMs and high throttle settings.

If you can clarify what motor you have and what fuel system, then we can give you a better idea if it will work.

--DD

[handyher]

Dave,

I have a 1.8 block with 1.7 pistons, rods heads etc.

the FI i think is for a 2.0 - to many connector on harness for d=jet

anyhow here are some numbers .

brain- bosch (has two numbers on tag)top number is 0 280 000 122 and bottom number on tag is 022 906 021 H this has a remanufactured tag on it by fuel injection corp # 56626

number on harness where it plugs into brain is 022 906 235

the end of harness that plugs into relay board is NOT the same as relay board - board has 4 prongs and this end has about 8 and is square. Lets see what else it has an aux air relay, decel valve, cold start valve ,air flow sensor box connected to air filter box, pressure reg., From pictures in bosch book it looks like LJet but.....

This stuff was in a box when i bought car and just now dragged it out and wanted to use it instead of carb stuff. thanks for help

[Dave at Pelican Parts]

OK, so you have a 1.7 motor. The 1.8's L-jet EFI should work OK, I believe.

You appear to be describing L-jet EFI (my reference book is at home so I can't tell you on the part number right now). The 8-pin connector is not the relay board connection, though. I'm thinking it is either for the "dual relay" or for the resistor pack for the injectors.

I'm not as familiar with L-jet stuff as I am with D-jet. I do know that they have articles on http://www.type2.com , because the later Buses used L-jet as well.

--DD

[JWest]

Renee,
Just to be clear, 1.7 and 2.0 engines all used D-jet in the 914s. All 1.8 914s used L-jet.

Later buses had 2.0s with L-jet also.

So you have a 1.7 and want to use a 1.8 L-jet on it (is what it sounds like). This should work just fine.

Posting some pics of your parts and harness would probably help a lot.

[jamcleod]

so if you want to put L-jet on a 1.7L (which is usually D-jet) all you need is the L-jet wiring harness and all L-jet parts. few, if any, D-jet parts cross over to L-jet. you won't be able to use a D-jet harness with L-jet FI system if that's your basic question.

[handyher]

will try and post pic.

[handyher]

here is other half seems as if i can not get attach multiple to work... must be a blonde day !

[Dave at Pelican Parts]

Yup, those are L-jet connectors allright!

I think Bowlsby has done some looking around at what the L-jet wiring harness is like. Hopefully he can comment on which connector is which.

One tip that works most of the time but not all of the time... These wiring harnesses take a "set" with age. So if you lay them out on the motor, the branches of the harness will tend to bend toward the components the connect to. You may have to roll the harness around to get the wires to come out in the correct direction in the first place, and you may have to figure out which way the initial main bundle goes, but you can at least get pretty close that way...

I would start with the ECU plug. The ECU almost always lives in front of the battery tray in the lower right front corner of the engine bay. On D-jet cars, the harness goes aft from there and across the back and then around to the relay board. The L-jet layout may be similar.

--DD

[handyher]

got that now ... in looking in my books i found what looks like the wire harness i posted picks of. how do you tell what year of Ljet this stuff is or is that where the numbers come in...? I found that one of the plugs on the harness should go to an egr vavle. that would be 75/76???? i have no such animal on my car or want one. also is the Ljet for a 2.0 different or more difficult than the Ljet for a 1.8 ?

It's looking like i will have to stick the damn carb back on just to get her back on the street and then try a locate Djet stuff.

thanks for the advice and help

[jamcleod]

2 large white multi plugs are for L-jet resistor pack and fuel pump relay (i'm "pretty" sure) i have a 74 L-jet (and an 81 Vanagon). now, correct me if i'm wrong, but i don't think an egr has a wire. my 74 does not have an egr so don't know about 75 L-jets, but my Vanagon does but it's a valve operated by linkage comected to throttle switch, no wire. '76 912E is a 2.0L motor with L-jet

[handyher]

thanks that explains the big white plugs. think this stuff is not the right stuff for my squish car (son in laws term of endearment for 914) so i will just put back the carb for now. maybe santa will bring me the right stuff.
maybe i will go do this now

hummmm beer !

[VARam1500]

Here's my best guess (corrections appreciated):





The one marked coil (-) is the ignition signal to the ecu to time the injection since there are no trigger points in the distributor. I don't know what the second medium sized black one goes to. You should be able to pin that thing out. This diagram might be helpful.

--Case...

[jamcleod]

in the picture with the labels of the 2 plugs with black boots..... one is for the air flow meter and the other is for the throttle switch.... again, you can figure out what plug goes to what using a schematic ie, in Haynes, Lash
we don't need no stinkin' carb...

[Kenny Powell]

If Chris Landt is out there anywhere he will echo what I'm about to say we ran into that problem with 2 diffferent Ljet harnesses the 74' has 6 pins going to the air flow meter and the 75' has 7 pins that can cause some confusion. Hope that helps a little

[bowlsby]

I have examples of both the 74 and a 75 1.8L 914 L-Jet FI harnesses. I have studied them in the past along with the factory schematics of what goes where.

I have scribbled out schematics which I would be happy to send to you as well as a fully numbered wiring diagram so you can check ou the continuity of the harness.

I can make limited repairs to them if needed.

The 8-pin box connector goes to one of the double relays if I recall correctly.

Jeff Bowlsby
bowlsby@aol.com