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New spark plugs do not always come pre-gapped. It is always wise to check the gap before installing. The routing of the leads have to be in the same order as they were removed, otherwise cross-firing can occur. Ensure the leads are installed at the distributor in the correct firing order.
Make sure the firing order is correct that you didn't mix up the leads when changing plugs.
it sounds like you need a new coil pack Or you could have two of the plug leads reversed. I'd check and make sure I have voltage at all 4 plugs before I bought a coil pack.
In a V6 Commodore VT, the spark plug leads connect to the ignition coils, which are located on top of the engine. Each lead corresponds to a specific cylinder, with the firing order typically being 1-6-5-4-3-2. The leads run from the ignition coils to each spark plug, ensuring proper ignition of the air-fuel mixture in the cylinders. It's important to connect the leads correctly to maintain engine performance.
mg zr firing order
Many V6 engines have been based on V8 designs. One characteristic of these engines is a notorious odd-firing behavior. Purpose-built V6 engines use one crankpin per cylinder for a smooth ignition 120 degree ignition pattern. Most V8 engines share a common crankpin between opposite cylinders in each bank. That is, the crankshaft has just four pins for eight cylinders, and a cylinder fires every 90 degree for smooth operation. When two cylinders are "removed" for a V6 variant, the firing order becomes uneven. One 90 degree ignition is removed, so the engine fires at 90 degree, 90 degree, 90 degree, and skips one 90 degree. This leads to a rough idle and increased stress on the engine mounts and chassis.
what is the firing order & leads for a landrover discovery 1991 3.5 v8i duel fuel
When you track leads you can focus your marketing in the area where most of your leads come from. If you are focusing in your correct area, your returns will be better.
If its a CA20 engine (which it probably is if it has 8 leads) the order is 1 3 4 2
May have failed coil pack, there are 3 coil packs and 3 leads, 1 coil pack fire 2 cylinders in wasted spark. Isolate the failing cylinder and test the input voltage and signal to coil using a led test light or noid light. If signal is present- replace the coil pack If no signal possible crank/cam sensor issue or ecu
1 3 4 2 is firing order
Firing order is 1-3-4-2.