Had to change the valve cover on my 1991 merc. capri and I guess I have the spark plug wires crossed. The fireing order is 1 3 4 2 but I don't know which wire is which.

carbon (Slept 3 nights,(on vac 30 day)\
answer 1 wire at a time. or it cross fires.
my guess is you meant changing carbon core
HV spark wires, but the plug wells are like oil pits. (flooded) SUPER COMMON.

(not spark tips carbon-ed up. right)

http://www.fixkick.com/IGN_timing/tune-ups.html#SETS

get he MAG wires and win.! max life and better spark!!!

all G16b do this seen 100s and all C.O.P engines.
1 cause
owners did not do full 60k mile tuneup
per operators guide, lost it have it ask.
the valve lash step, demands a new valve cover gasket set.
if not it will fAIL, it will,like pissn on a sparkplug
bam. like texas talk, i do...sorry

and a cam belt.. forgot that too?
that is fail 2 , in the woods,
or like train light in the tunnel.

not one of those parts last the life of engine
the real reasons tuneups were invented
and why planes dont crash (of ddumbb things like this)

tuneups on this engine, only make long walk home
on other engines, most DOHC. boom head valves bent or far far worse.

if lost
firing order
is
1342

no engine stated, and is an engine question.
G16,J20, or H25?
1.6l, 2.0L or v6 ?
my guess, is you removed spark plug wires and put them back out of order, never do that, always change wires 1 by 1.
or the firing order will be wrong, (cops excepted, coil over plug)

how many coil packs do you have.
1
2
4
6?
we cant guess any of that.

check the firing order of the plug leads as they may have become crossed during the plug change. Check that the coil wire is firmly in the distributer cap.

If it's popping through the intake, you are dealing with a timing issue. I have been "twisting wrenches" for over 25 years and even though I don't know how I do it but once in a while I end up crossing spark plugs wires. Below is a picture of the correct firing order. If this is the same as you have done and since the vehicle is older it is possible that the distributer has been taken out in the past and it's possible that whoever did the work put the number 1 spot in a different position but I'm just kind of guessing.

This is a quick explanation:

1996 Dodge Caravan
3.3 liter




The big rectangles are referencing the engine, the cylinder associated to it's "firing" are the colored circles, and the are also the location of the spark plugs....the smaller lego-looking block is your coil pack. The spark plug wires run from the coil pack to the spark plug on the engine. The wires match 1 to1 or black to black...and so on....

When these are matched to each cylinder/spark plug and it's wire leading to the matching coil pack position, this is it's "firing order". If one of the wires is "crossed" meaning, not 1 going to 1, then the engine will "miss-fire".

Did you replace the igniter (inside the distributer) and the ignition control module (on top of the distributer. Sometimes the control module gets overlooked...

Hope this helps. The ignition coil:

• changes low-voltage pulses from the PCM to high-voltage pulses.
• fires 2 spark plugs simultaneously.
• has 3 transformers.
  • One transformer fires the spark plugs for cylinders 1 and 5
  • One transformer fires the spark plugs for cylinders 2 and 6
  • One transformer fires the spark plugs for cylinders 3 and 4

Spark plug wires:

• carry high-voltage pulses from the ignition coil to the spark plugs.

The spark plugs:

• change high-voltage pulses to spark at the gap, which ignites the fuel and air mixture.

The firing order is 1-4-2-5-3-6.

Here is the diagram you ask for. While it says it is for the 3.0L V6, it is the same for the 4.0L V6 if that's what you have...

3.9L V6 Engine. Engine Firing Order: 1-6-5-4-3-2. Distributor Rotation: Clockwise.............did i guess the right motor? let me know/rate me

All things Capri are at //www.techcapri.com/
The manuals are there - check them out ...
Wiring diagrams are there. Probably fixed by now anyway.

Regards
Richrobi