D-Jet sputtering Options

[JtoTheBeezy]

With no consistency my 2.0 fi car will sputter and shutter. Its hard to tell weather its a lack of fuel or a lack of spark. Its fairly speratic but constant once the car is warm. What I usually have to do is stomp it or feather it past 4k rpm and it runs fine above 4k.

Things ive fixed/replaced
New oil and filter
new fuel filter
Checked/replaced any bad vacuume hoses
replaced and calibrated the tps
checked mps
checked aar. Stays closed 24/7 which is better than open randomly
new cap
new rotor
Adjusted timing to the best of my ability (IMG:style_emoticons/default/blink.gif)

I've owned this car for over a month now and it has never run properly due to this problem. Today im going to check the injector points and do a valve adjustment. I can hear the injectors firing with the key in the on position but they could still have issues I suppose. Help me... carbs are calling my name. (IMG:style_emoticons/default/bs.gif) (IMG:style_emoticons/default/WTF.gif)

[Gcotton92203]

I had what sounds like the same problem with my 73. 914 2.0 Fluctuating idle, mileage seemed to drop, Bad stumble just above idle. It would fall on it's face and stumble when starting out from a stop, but run fine at speed or when the revs were up. Would also buck under load. I checked all vacuum lines , all good. All ground connections good. Adjusted throttle positioner, tested trigger contacts. All injectors firing. Valves good, timing good, dwell good. I could even be sitting still, throttle just above idle and make the engine shutter like it was missing cylinders. Finally after taking a dinner break, I went back and decided to check a spark plug that had once become loose. It was fine but out of habit I tightened the spark plug terminal where it screws into the plug wire. It was a bit loose so I did the same to all spark plug connectors. Bingo. No stumbling. Nice quick tight revs. Much smoother and steady idle. Sometimes the most difficult problems have the simplest solution.