Firing order question

[Brad]

Hello Group,

My knowledge of engines is limited and to some of you this might sound like
a stupid question be here I go. I have 93 Caravan V6 3.0L. How do you tell
if the spark plug cables are in the correct sequence? The distributor cap is
marked but how do I tell if cables are connected to the right plug?

Thanks in advance.

Brad

 

[Richard Benner Jr]

Hello Group,

My knowledge of engines is limited and to some of you this might sound like
a stupid question be here I go. I have 93 Caravan V6 3.0L. How do you tell
if the spark plug cables are in the correct sequence? The distributor cap is
marked but how do I tell if cables are connected to the right plug?

Thanks in advance.

Brad

Aligning with the spark plug, on the shield over the exhaust
manifold is a number,numbering the sparkplug. It is a LARGE #

 

[Geoff]

"Brad" <[email protected]> wrote in message

Aligning with the spark plug, on the shield over the exhaust
manifold is a number,numbering the sparkplug. It is a LARGE #

Not if somebody's changed the exhaust manifold gaskets.

Plugs closest to the radiator are even numbers, left to right 2, 4, 6

Plugs closest to the firewall are the odd numbers, again left to right
(passenger -> driver's side) 1,3,5. #1 is accessible through the alternator
bracket.

Distributor rotation is counter-clockwise. On the distributor cap, viewing
from the front of the vehicle (standing in front of the radiator), the
nipple for #1 is at 12 o'clock (furthest away), #3 at 10 o'clock, #5 at 8
o'clock, #4 at 6 o'clock (closest to you), #6 at 4 o'clock, and #2 at 2
o'clock.

Be aware, however, that underneath the distributor cap, the rotor contacts
are offset, such that when cylinder #1 is firing, the rotor points directly
towards the driver's side of the vehicle. "True" firing order is
1-2-3-4-5-6, but the apparent firing order (from the perspective of the plug
wires and how they're connected to the cap) looks like 1-3-5-4-6-2.

Oh, and one more thing: when properly connected, using the wire looms for
the sparkplug wires, the plug wires divide nicely into 'front bank/rear
bank' as they come off the cap.

Hope this helps.

--Geoff