Only Cly #1 missfires after it warms up. But at cold ilde it runs fine. I tryed erveything new plugs, dizzy, injetors. Compression tested it 160 across the borad. Need help!!!!!!

 

Localized vacume leak effecting the Cylinder1 intake runner. (runs lean once Ecm's auto-rich cycle shuts off)

Leaving the Air Inlet Tube attached, take a can of spray Carburetor cleaner and selectively spray around portions of the Intake Manifold. If you've a vacuum leak the engine rpm will rise as you hit the leak with the cleaner. (It acts as a supplimentary fuel source.

P

 

I tryed that. No Vacum leak was found.

 

Ignition wires??

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AccordEX-T &raquo;</TD></TR><TR><TD CLASS="quote">Only Cly #1 missfires after it warms up. But at cold ilde it runs fine. I tryed erveything new plugs, dizzy, injetors. Compression tested it 160 across the borad. Need help!!!!!!</TD></TR></TABLE>

P

 

I havnt try new ones

 

When next you can find your way under the hood, try this:
Let the engine reach operating tempurature.
If you've got an old spritz bottle around (empty 409 spray bottle etc) fill it with water.
Spray the ignition cables.
If any of them have become pourous and leak voltage the water will force the issue and the engine should start skipping.
What could be happening here is related to dynamic compression and how it requires additional ignition voltage to jump a spark under load as opposed to at idle (no load)
I know we're going into deep theory here, but you've touched on most of the usual suspects already.

P

 

Ill try that tomorrow.

 

I fixed it!!!!!!!!
2 vacuum lines were swicth for the EGR