Preparing D-Jet for my '76 914, D-Jet Options

[Gatornapper]

Not long after I got my '76 914 in 2017, upon advice from the Brain Trust here, I purchased at a great price a working D-Jet complete from another member here who had pulled it from his '76 2.0 about 5 years earlier and had kept it all in boxes in his garage.

I have mentioned before that once I got the Weber IDF-44's dialed in and proven the condition of the engine, I would put the D-Jet in the car and see which I liked best. That's been the plan since I got the car almost. I used to work on Bosche EFI systems on my '72 Volvo and other Volvo's. Got very familiar with them.

Two things have now given me the motivation to move on installing the D-Jet.

1. Getting the CIS system working like new on the 924 Turbo/931 (after 17 years in storage) has reminded me of how great these old FI systems are when they are dialed in. Cold starts on the 931 are as good as my Cayman S. And in all conditions, the responsiveness of the FI is superb. Time for that in my 914.

2. Dr. Phil here as done an incredible favor for me on the major components of my D-Jet.

* He actually put my ECU in his car and proved that it is problem-free.

* He also did the same with the TPS. Turns out it only needed a good cleaning of the contacts, and he ran it too in his 914 (my fav 914)[anderssj 's green '72 a close second] and proved it t be good.

DrPhil - you are one incredible guy - and I cannot thank you enough.

So for major parts, that leaves my MPS. It needs rebuilding. No problem, I've rebuilt similar devices successfully. I have Tangerine's kit and his instructions and the other ones on the web. And have the ability to pull the vacuum needed and measure the inductance to dial it in.

Been cleaning up the parts and have this to show for it:

(IMG:http://www.914world.com/bbs2/uploads_offsite/hosting.photobucket.com-21449-1643849920.1.jpg)

I have 2 problems, 1 of which is major. First, I'm still focused on the 931 with a lot to do on it. It is now my daily driver so my Cayman S can take a break after 96,000 mile (still like new).

The major problem is this: On Nov. 26th, the engine in my 914 very suddenly went to crap - after 2 years of running like new. After an hour of running fine, like normal, it very suddenly lost power. And it didn't want to even run below 1,500 rpm, and refuses to start. This is the easiest, quickest starting engine in my whole life, lighting up nicely after the very first spark. No more.

I did get the engine running and checked timing. Perfect. Engine runs smoothly and like normal without load above 1,500 rpm - sounds perfectly normal. But won't run below 1,500 rpm, and has no power.

Checked the compression: BUMMER! 63 low to 95 high, 73 and 78. Was 115, 118, 118, 120. Engine has now 66k miles on it. Yes, I'm overdue for a valve adjustment. But my lift has been occupied non-stop with the 931.

Hopefully next week I can get to adjusting the valves. I'm very afraid something far more serious is going on.

Why would engine go from running perfectly to no power and no idle? Suddenly?

Any thoughts as to what I might be dealing with here are greatly appreciated.

The D-Jet will be waiting if I've got major engine problems.

TIA,

GN