No Fuel from Injectors, in crank mode Options

[cary]

We're still pulling our hair out. Took a perfectly running car. Pulled the engine to install a new muffler and straighten the front motor mount.

Now it won't start at times. Right now I have NO FUEL SPRAY from the injectors when we crank the ignition. It won't start like that. (IMG:http://www.914world.com/bbs2/html/emoticons/mad.gif)

Checked the valve adjustment, A-Ok.
Checked the ignition. All checked out, both HT & LT. We did have the ignition wire hooked to the (-) for a while.
But switching it back didn't help. Could that have burned up something I can't see ?
Fuel pressure perfect 29psi. Pumps 8 oz in 15 seconds.

Here's what I have now :

When you charge the ignition. One opposing pair of the injectors click. But a couple times. I got nothing. ZERO.
Then I unhook the harness to check the trigger points. I still get the click of the injectors with the harness unplugged. Is that right ?
So that leads me to test the harness to the ECU. All three (12, 21 & 22) test fine. Both continuity and signal. Still stumped. Tested the signal out of the trigger point connector. Fine on both sides.

Now I pull the injectors to test for spray. Nothing. I get a burst at the start. None during the cranking. Then a couple bursts when we turn the key off crank. That is screwed up. Pulled the plugs dry as a bone.

There has to be a simple answer. Its not that complex. But I'm missing something.

How come no spray at ignition crank ?

[DNHunt]

Cary

A bad CHT will keep the car from starting but, I believe it's because it floods not from being lean. I imagine you have thought of this already but check all the connectors and grounds (especially grounds). If I remember there should be a constant ~ 12v which you should be able to measure available at the injectors and the FI switches the ground. It may be wothwhile testing the resistance in the harness also. The insulation on 30 year old wires gets awfully hard and can crack.

The fact that you were able to see some improvement after replacing the MPS makes me suspect connections on that side of the engine. In messing with my car I have found that the connectors at the injectors can become loose with thw D-jet style connectors. I've had to give the females on the harnessa gentle squeeze to close them a little and I've cleaned them to bright metal.

Dave