1976 fuel injection questions Options

[emerygt350]

Check to see if you actually have a pcv valve and see if it is working.

‘75/76 2.0 cars did not have the PCV valve.

Oh yeah, I keep forgetting that. We are working off that 74 map.

So you definitely need to find a 76 map if only for my sanity.

Also, you need a PCv system (passive in your case) The car came with one and if you don't have a functional setup two things happen: your engine bay gets really nasty, and you get all kinds of water and impurities in your oil and the engine dies.

[emerygt350]

And... That decel keeps you from blowing out your mps, so I would get that going soon too.

[JeffBowlsby]

Good point that this is a ‘76 car, the 75-76 cars are slightly different from the 73-74 cars. One thing that comes to mind isolate ports on the air plenum and air cleaner are different than the earlier cars. The 76 definitely requires the charcoal filter, and is mounted in the engine bay by the battery.

Check here for details: https://bowlsby.net/914/Classic/zMan_1975_S...iningManual.pdf
https://bowlsby.net/914/Classic/Emissions.htm

[Ron914]

Hi Jeff ,
Yes ,as I mentioned I have a federally conforming/non California car . I have pulled apart and cleaned and refilled my canister with new charcoal . I have everything that came on the car as far as I know but those valve covers confuse me . I will be posting a WTB ad in classifieds soon. I have a 88HP motor GCD04876 . In all the parts I got when I purchased the car I never saw a Fuel feed cut-out ( this concerns me ) I think I will hold off another week while I make sure I am going to pass my smog check . I never saw a place in the wiring harness that this would hook up to ?

[emerygt350]

They were always trying different things to handle deceleration. Ljet had a fuel cutout (I think, it's probably just a feature considering how it works), I think I remember discussions about alternatives to the decel valve. Such a late model might have had such a thing. I believe the retard also helped with emissions on decel.

I would make doubly sure everything is to 76 speck with those hoses. That right front side of plenum and the passenger side facing portion of the air box changed quite a bit late 74 and probably even more by 76.

[emerygt350]

Anyone got a good 76 vacuum map? I am always nervous sharing because half of them were wrong (decel routing).

[Ron914]

They were always trying different things to handle deceleration. Ljet had a fuel cutout (I think, it's probably just a feature considering how it works), I think I remember discussions about alternatives to the decel valve. Such a late model might have had such a thing. I believe the retard also helped with emissions on decel.

I would make doubly sure everything is to 76 speck with those hoses. That right front side of plenum and the passenger side facing portion of the air box changed quite a bit late 74 and probably even more by 76.

I know ,My air cleaner/Plenum looks a bit different than anything I have seen on this site , there only about 4070 76 models produced and how many of them were USA models vs California models ,then how many of those are still around . I agree I don't want to get a fail after the cars last smog check in 2018 . 2025 makes 7 years it has not been smogged it might be a flag in the system .I registered and transferred the title in my name on August 2023. It took a while to find a smog pump and I have been working on the high idle since .

[Ron914]

The exciting thing for me is we believe this is a original survivor car .Matching numbers un-modified (except for what I did to the motor) and in the 914 world mostly a rust free car with no longs, hell hole, frunk ,trunk or floorboard issues .It did have an accident at some time as the front fender has been replaced and there appears that the car ended up on a rock which damaged the bottom under the tunnel right below the shifter .I had a heck of a time replacing the plastic fuel lines with new stainless ones.Other than that I think it is a pretty nice car. If I was in Atlanta I would go see George and let him tell me what I have .

[Ron914]

Hello @914incali
I also have a 76 914 I am trying to get through a smog test and I want to apologize for hi-jacking your post . I had many of the same questions as you had . I am getting closer to getting my 76 D-Jet FI smogged in California . If I can provide any help please let me know .I might be able to answer some questions or provide a picture but I am not as knowledgeable as many of the helpful folks on this site . My car was never sold in California so I should have a pretty good chance of getting it smogged ,if your car was first sold in California as others have mentioned it is difficult to pass California smog without all the equipment it was originally sold with. I didn't realize this when I purchased my car but thankfully it was not sold here but sold in Michigan and then moved to California in the 80's.
Ron

[Ron914]

@emerygt350
I think this will be my last post in this thread and I should start a new one for my smog issues this one is getting to long and confusing .

I just want to add one more photo here of my distributor (I think original to the car) showing those two lines coming off it .

This week is going to be a busy week for me and I probably won't get to the smog shop .

I just have to many things going on and to complete this week .

I also added the diagrams found in Jeff's tech notes , I followed this for routing my lines from Distributor to air cleaner and TB .

[emerygt350]

Yes, probably a good idea. But you know now that they don't go to the air cleaner right? Retard goes to the posterior of the tb, your advance just lays there on top of the engine.

[Ron914]

Yes, probably a good idea. But you know now that they don't go to the air cleaner right? Retard goes to the posterior of the tb, your advance just lays there on top of the engine.

@emereygt350

If you look at the legend and compare to the drawing I added something is backwards and this might be my issue . It looks to me like this drawing and legend do not match ?

Am I wrong in the way I interpreted this drawing ?legend ?

ID hose#11 says its retard and # 10 says advance

To me it looks like I need to swap those and leave the retard exposed to ambient air

Which side of my distributor is the advance ?

I'm a bit confused

[emerygt350]

Your car doesn't have an advance port, that would be on the anterior of the throttle body. They stopped that in 74. Your car only has a retard port, on the posterior of the throttle body. The retard on bowelsby's map is correct and goes where it should, as it should on your 76. However, on a 76 the advance hose from the distributor just lays on the engine, unattached to anything. The only port near where bowlesby has drawn the adv hose ending is the port for the mps. That is pointed straight up out of the plenum and needs to go to the mps.

[emerygt350]

If you have your advance hose hooked to any kind of vacuum source available on your engine, that is probably why the idle is high.

[Ron914]

If you have your advance hose hooked to any kind of vacuum source available on your engine, that is probably why the idle is high.

Hi Emery,
You are correct and the diagram from Jeff is correct . I had the advance hose connected to the plenum. I really wish I had the correct D-Jet vacuum hose diagram because some things on this diagram are correct and some things are not for my car.

Like the Anti-flashback , I don't have one but I do have the 13mm ports on my valve covers.
The oil filler goes to the 13mm port on my air cleaner and I do not have a PCV as in this diagram , this has caused me a bit of confusion .

The Evaporative filter is correct for my car .

I purchased a stacked port adapter as shown but now I found I didn't need it .

I also purchased a anti-flashback valve that I didn't need because I saw it on this diagram because I had the 13mm port on my valve covers .

These things caused me a bit of confusion again.

Removing the advance hose from the plenum solved a lot of problems .

I can now use the idle adjustment screw to lower the idle ,however I had been trying to time and adjust the ECU when the car was connected wrong .

I started the car and ran into several new issues I need to sort out .

I noticed the motor is getting hot now so I stopped .

Tomorrow I will get back to it and start my new Thread .

As I mentioned before I cannot see a timing mark so I have been trying to time by ear ,I have the #1 plug on the distributor pointing to the drivers side Cylinder #1 as I read .

Anyway I am ended 914incali's thread and will start my own for any updates .

Tomorrow I will reassess this and report where I am at .

Thank you for hanging in there with while I was apparently going down the wrong road with this one .

One more thing to think about is after correcting the vacuum line off the distributor the car seemed to run better meaning I had more pep when I stepped on the accelerator and I was able to bring the idle down with the adjustment screw but after I shut the motor off it would not start and stay running until I gave some advance to the timing .

[emerygt350]

That is good news. Progress! I will wait for your new thread to comment but I think your current issues are easily resolved. And fyi, you will want to connect the 13mm ports to the air box or your engine bay is going to be an oily mess.

[brant]

Please don’t
“Time by ear”

Remark the timing mark
There are fan templates and you can pull a valve cover also

Doing things lazy/wrong will only get you in trouble
You’ve been fighting this awhile already due to inaccuracies.

Brant

[914werke]

I started updating this one based on an unmolested 76 CA car I had in the shop

[Ron914]

Please don’t
“Time by ear”

Remark the timing mark
There are fan templates and you can pull a valve cover also

Doing things lazy/wrong will only get you in trouble
You’ve been fighting this awhile already due to inaccuracies.

Brant

Hello Brant ,
You are correct but maybe when I get my new thread started you can help me with this . My mechanical skills are not that strong , I am a DIY'r but sometimes I know just enough to make me dangerous .

I have to me some unique challenges with this motor setting the timing because the mark on the fan is not present anymore , it was on the fan when I assembled the motor but it does not show up in the viewing port when I go to hook up a timing light and look for it.

I have read about pulling the valve cover on #1/2 head and jack car up to rotate a wheel to get slack in the two valves on Cylinder#1 and then make a mark on the fan that I can use for timing but some things about this I will need more clarification on for me .

I am 70 and never attempted a project like this in my life so I run into a few things I need help and patience with ( I feel a bit like a dummy sometimes) as I am definitely out of my wheelhouse here. Having never adjusted valves on a 914 yet I have read that to get to them I will need to remove my heat exchangers .

Anyway I have my Mother living with me and today is her 90th birthday so I probably won't get to the new thread today that I want to start where I will ask the questions I need help with .

Thank you
I do love a challenge and I will be back as I have been waiting almost two years to drive this car .

[Ron914]

I started updating this one based on an unmolested 76 CA car I had in the shop

This looks more like what I have on my car so I will carefully look it over and I get back to you with any differences on my unmolested 1976 (49 state car ) and confirm your diagram.

Thanks you have already stated the diagram I was going to draw up and send to Jeff.