D-Jet Fuel Injection Help, Loss of Power with Warm Engine Options

[Mblizzard]

I have a 1973 2.0 built to a 2056 running stock fuel injection. I am running points and I have verified the dwell and timing are correct. The air temperature sensor on the throttle body is disconnected due to it causing the engine to hunt excessively at idle. The valve were set less than 500 miles ago.

The car starts and runs fine on initial start. It at times has a little hesitation on acceleration due to the wear on the TPS board I think. As the engine warms up into the normal range, I experience a significant loss of power. The temp never goes past the "M" on the temp gauge. There is never any pinging. But there is just no instant response to pressing the accelerator that is present when the engine is cool. At times pushing the accelerator results in little or no engine response for a brief period and the engine almost stalls.

I have checked numerous times for vacuum leaks, lose wires, and made sure the grounds are good. Checked the plugs and it does not appear to be running rich or lean.

I tried to calibrate the TPS according to the Pelican article but never really got the readings as indicated in the article.

I am going to go back through it one more time but I need some suggestions as to what I should check next?

[Mblizzard]

Oh so I got the AF Guage (IMG:style_emoticons/default/smile.gif) installed.

So under acceleration I am at 13.4 to 14.7.

WOT I am at 14 to 15 plus.

So that tells me I am running lean. With the additional displacement that seems to make sense.

What is the best way to overcome the lean condition? I am assuming MPS adjustment?

Is there a tool for holding the outer screw that will allow you to adjust the inner screw out to richer up the mixture?

[Dave_Darling]

What is the bust way to overcome the lean condition?

Best? Any way that works.

Try bumping the fuel pressure a few PSI. It looks like you're already over the stock spec by a bit, but you can go a bit further IMHO.

You can add resistance to the CHT circuit. That will make the FI think the engine is always cold, so it will add extra fuel. It can be a bit fussy.

You can unplug the intake air temp sensor. That will richen the mixture across the board slightly.

You can adjust the MPS. It is definitely fussy--you can make large mixture changes with little tiny physical adjustments. You'll have to hold things in the right place as best you can when you go to adjust stuff.

--DD