Help! I'm Stymied!, Only firing on #3 and # 4 Options

[DipShit]

1.7 D-Jet

Engine was running just great until about two weeks ago, sigh. Now only fires on # 3 and # 4.

I have cleaned every connection including all grounds. And I mean cleaned them good! The elecrical appears to be just fine. I get a good noid light at both # 1 and # 2. The injectors have tested just fine as well (I'm getting about 7cc in 15 seconds). I have 40lbs of pressure the 1,2 rail. The spark plugs are getting juice and fire.

I have installed new points, cleaned the triggers (which shouldn't have mattered because of the sequence) and set the dwell. I'm a tad under at 44 degrees, but again shouldn't keep # 1 and # 2 from firing.

The timing has to be close as it runs really smooth for just two cylinders.

If I pull the power to injector 3 or 4, I get a real good drop and she will die. If I pull 1 or 2 - no change.

If I add propane to the intake, I get a good response in higher rpm.

I had originally traced to the Temp II sensor and it failed, so I replaced it. A new one seemed to be the fix, but only for a moment.

I have good fuel, spark and air -

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I'm STYMIED (or just a REAL DIPSHIT)

[DipShit]

Here is the latest that I have done and I am STILL just running on # 3 and # 4:

Cleaned and Checked all Grounds

Replaced Temp Sensor II

Swapped out ECU

Swapped Wiring Harnmess

Cleaned points, contacts and set Dwell

Adjusted the timing

Adjusted the valves - now 110, 110, 100, 95 was 125 120 100 80

Swapped Dizzy Cap

Swapped Plug wires to test

Swapped Coil

Checked Fuel Pressure - 30 psi

Checked Flow/Spray of Injectors 7cc in 15 seconds, nice spray pattern

Still no joy with 1&2 and only running on # 3 and # 4

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[VaccaRabite]

Here is the latest that I have done and I am STILL just running on # 3 and # 4:

Adjusted the valves - now 110, 110, 100, 95 was 125 120 100 80

Are you confusing compression testing with valve adjustment? This line does not make sense as is.

What are your intake and exhaust valves set to?

Did you ever test the fuel spray pattern on your injectors?

How are you doing your compression test? A valve adjustment should not cause you to loose 15 psi in a cylinder, unless you are incorrectly adjusting your valves (too tight).

Zach

[DipShit]

Here is the latest that I have done and I am STILL just running on # 3 and # 4:

Adjusted the valves - now 110, 110, 100, 95 was 125 120 100 80

Are you confusing compression testing with valve adjustment? This line does not make sense as is. I did a compression test a couple days before adjusting the valves. I adjusted the valves to .006 and rechecked compression for the hell of it.

What are your intake and exhaust valves set to? .006
Did you ever test the fuel spray pattern on your injectors? yes, good

How are you doing your compression test? A valve adjustment should not cause you to loose 15 psi in a cylinder, unless you are incorrectly adjusting your valves (too tight). With a PSI Guage at the sparkplug hole.

Zach