I finally have our FI 73 2.0 on the road and have logged close to 550 miles on a rebuilt engine. The complete engine build was by Brothers and the fuel injection was installed by the shop the car was at. I 'm having some issues and need your expertise. Here are some more details:

- All FI parts have been confirmed to match numbers wise
- ECU and MPS have been tested by FI Corp and are good
- New gas tank, filter and stainless lines
- Bosch electronic fuel pump
- All hoses have been replaced and checked for leaks
- AAR VALVE has been replaced with a rebuilt unit. On a cold start it will not hold a high idle. We tried with other AAR vales with similar results.
- For me the exhaust smells to rich
- When I stop at a red light the RPMs drop to zero and then bounce back up and idles properly
- Idle is at 900 rpm but sometimes will be at 1100 RPM. I prefer the higher RPM
- Almost forgot...I have a 123 installed.

Here's what she looks like:

Click to view attachment

Your suspicion that it’s running rich is probably correct. I’m guessing that your MPS needs calibrating for your engine. You’ll need the tools tangerine sells and a way to measure your AFR to get it dialed in.
First though, try turning the knob on the ECU a click or three counter clockwise. If your throttle position sensor is correctly set, that should lean out the fuel mixture a bit at idle.
If that doesn’t do it, I’d recommend checking MPS with a vacuum pump to see if it holds vacuum. I have in my possession an MPS that was ‘rebuilt’ by FI Corp and found it had a torn diaphragm. If it holds vacuum get the tools to adjust it.

Car looks great, btw.

Thanks for the info! Will give it a shot this weekend when the rain stops!

Any other ideas from the garage are welcome!