D-Jet Conversion not going as planned., Car starts but will not run. Options

[slapshot]

I am converting back to D-Jet and my car will start but dies right after. It will not rev up applying throttle. I have a 1975 914 2.0. It was running great with Weber 40s prior.

The D-Jet system is from a 1974 2.0. All the parts came in visibly good condition. TPS calibrates good, AAV tested good, Thermo sensor good, air intake temp sensor good, and a new cylinder head temp sensor. The only test that I think is failing is the vacuum test on the MPS. It leaks. Video of testing the MPS.. The MPS has also been rebuilt at some point. The original part # has been removed. There's a good chance it is not calibrated for my car. I have all new vacuum hose and fuel pressure is between 28 and 30.

I don't have any tools to calibrate the MPS. Should I try turning the inner screw on the MPS to see if it helps? Or should I send it to someone to have it rebuild again and recalibrated? If the later do you have any recommendations on who to send it to?

[rjames]

You can make a cheap homemade smoke 'machine' very easily that will be more accurate than spraying canned air. Do this before moving to the MPS.
And if you have to move the to MPS, yes, you'll need a wide-band AFR to set it correctly for YOUR car. Even if someone were to calibrate an MPS for you, unless they did so while it was installed in your car and reading the AFR, it likely won't be set correctly for your engine.


Also, do you know if they changed the cam on your car when they ditched the FI for carbs?

[slapshot]

Also, do you know if they changed the cam on your car when they ditched the FI for carbs?

The previous owner does not know if they changed it when he switched to carbs. He had it done back in the 80s.