missing under load

[jorge figueroa]

my name is jorge figueroa of puerto rico
i have a problem with my delorean (some time ago), when i drive the car in highway i have no problem.
when I stop at an intersection in idle the engine start missing under load.
i change the spark plugs(ngk), ignition coil (msd blaster 2)and ignition wires (8mm wire set)ans still missing under load.

[1batt4u]

Maybe fuel accumulator? Could be other things, but that's what first comes to mind.

[DMCMW Dave]

Was it doing this before you did wires/coil/plugs?

Did you change the cap and rotor?

What are the plug gaps set at?

[Kenny_Z]

Check the ground to the engine as well. I had the same symptoms until I fixed a grounding issue to the block.

[Ron]

Did all of the old plugs seem to be in the same condition?

[Spittybug]

My money is on a hairline crack in the distributor cap. With the car running, carefully wet the distributor cap with a light mist of water. If the misfire gets worse, you've found it.

I find it unlikely to be a grounding issue if it is only occasional, but it could be, and that is easy to check.

[David T]

This is not "missing under load". It could be fuel related, a dirty injector for instance. That would not be as noticeable above idle.
David Teitelbaum

[Ron]

This is not "missing under load".

Good point.
Now, I assumed he meant it was an auto in gear since he said stop at intersection, not really "under load" either, but not the same as simply "ideling"....

Jorge, please elaborate on "missing under load" and "in idle".

[jorge figueroa]

I already changed the fuel filter
I turned on the car today and added an fuel injector cleaner
and to my surprise the engine started to run perfect
without hesitation of any kind.
I opened the old fuel filter and it was super dirty

[David T]

You might want to open the tank and wipe out any dirt you find. Run a tankful of fuel and if it still is not right you should have the injectors cleaned. Best way to know if everything is running well is by watching your gas mileage. Should get better than 20 MPG.
David Teitelbaum