Did not label distributor cap spark plug wires, what sequence do you reconnect the wires on the distributor? it is a 3.1L engine 1992 Isuzu Rodeo and the distributor is located in the back of the motor, would appreciate any help
Front Passenger side on cap is 1 - if you look on the inside of your cap there SHOULD be a pin marked with a 1, and the plugs go CLOCKWISE not counter. Just had the same problem myself with my 91 Rodeo. Cylinders are as follows Passenger side (front to back) 1 - 3 - 5, Driver side (front to back) 2 - 4 - 6. I called the Isuzu dealer and they told me it was counter clockwise, but when I hooked it up that way it backfired through the Carb.
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FIRING ORDERS NOTE: To avoid confusion, remove and tag the spark plug wires one at a time, for replacement.
If a distributor is not keyed for installation with only one orientation, it could have been removed previously and rewired. The resultant wiring would hold the correct firing order, but could change the relative placement of the plug towers in relation to the engine. For this reason it is imperative that you label all wires before disconnecting any of them. Also, before removal, compare the current wiring with the accompanying illustrations. If the current wiring does not match, make notes in your book to reflect how your engine is wired.
Fig. 1: 1.8L, 2.0L and 2.3L engines Firing Order: 1–3–4–2 Distributor Rotation: Counterclockwise
Fig. 2: 2.6L and 2.8L engines Firing Order: 1–3–4–2 Distributor Rotation: Clockwise
Fig. 3: 3.1L engine Firing Order: 1–2–3–4–5–6 Distributor Rotation: Counterclockwise
Fig. 4: 3.2L engine Firing Order: 1–2–3–4–5–6 Distributorless Ignition System
To avoid confusion, ALWAYS replace spark plug wires one at a time.
The most important thing to remember about the removal and
installation of a distributor, cap or spark plug cable is that all
wires MUST be labelled before they are disconnected. Keep in mind that
these figures depict a firing order where the distributor cap terminals
are relative to EACH OTHER only and they do not necessarily depict the
tower positions in relation to the rest of the engine. This is true
because any distributor which has been removed and reinstalled may have
been installed with the No. 1 spark plug tower at any position (360
degrees) in relation to the rest of the motor, as long as the rotor
aligned to the No. 1 tower when the No. 1 cylinder was at TDC of the
compression stroke (valves closed, ready for the plug to fire). As long
as the remaining wires were connected in the correct firing order
sequence (depending on direction of distributor rotation) the engine
will run. DO NOT EVER remove more than one wire from the distributor
cap at a time unless you tag ALL wires and towers to assure proper
Procedure as follows: in either case remove # 1 cyl spark plug and rotate engine until # 1 piston is at top dead center , with a suitable marking pen make a reference mark on crankshaft harmonic balancer and timing mark indicator on engine timing cover. Make a notation on the distributor cap of the number one spark plug wire and also note the remaining wires firing order sequence on cap in order of rotation. Remove cap and note and mark rotor location , make a reference point on distributor body as well as engine block . Remove cap and wires , loosen distributor lock down bolt , disconnect distributor wire harness and label harness for reference to reconnect upon re-installation. Twist as you pull up on distributor , distributor should come out freely with minimal effort but occasionally they can be a little tough and need to be helped out with minimal extra persuasion...
If you find that upon re-install you get a trouble code P1345 don't threat just start over the process of placing # 1 cyl at TDC and then reference the marks you made during dismantle, There is a + - 3 degrees tolerance that the computer can adapt... But you will have to erase any trouble codes... You should not have to remove the hood, maybe just the air box and or filter housing for easier access.... Unless you are removing entire engine then yes remove hood by all means, mark hood hinges and mounting holes before removing for easier alignment during install of hood... Hope this helps...
This could be a problem with the spark plug wires. If resistance is high or the boots have carbon tracks, they could be causing spark to go places it shouldn't. Distributor cap? Make sure places like that are clean and dry. Check for grease or dirt inside spark plug boots. If all else fails, open the hood in the dark and look for sparks jumping around the engine when you rev it up. If so, replace the plug wires.
In the center of each valvecover is a well with a wire in it each wire has a seal cap attached pull up and youll find a stem which goes down a tube this is part of the spark plug wire the plugs are at the bottom of this tube youll need a long adapter on your wrench and socket for this job and you can extract the plug using the wires stem
Isuzu seem to have complicated things by changing engines, firing orders and even direction of rotation! As you can see, they've numbered the cylinders the other way than the 3.2L.
The Firing sequence for the 3.1 (traditional distributor) 6 cylinder is as follows -
If you take the distributor cap off, there should be a "No.1" formed on the inside. Stick a lead on this before you put the cap back on and go from there.
As leads are different lengths, you may have to swap a few to find the best fit.
I think 2 of them will look out of place - but that's the way it's designed. Just make use of clips for holding them neatly.