I have 12/ 97' model 318 i. It has no spark in 2&3 cyl....
My car wont start, it appears to have no power reaching the leads for cyl number 2 & 3. !! 1 & 4 are ok, and have good spark.
I have only recently bought the car, and dont know its service history. But my friend who is very mechanically minded, has carefully checked, and found that there's no power reaching the coil - despencer and onto 2 and 3 cyl leads !!
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Hi, Sound like you have the firing order wrong try changing the plug wires around or look on side of engine it normally is marked just below the spark plugs the numbers give you the firing orders IE: 1 2 3 4. Hope this helps give me feedback please. Thanks, Malcolm Campbell.
You could have 3 different engines in that rig. The firing order is 1-8-4-3-6-5-7-2 for most Dodge 8 cyl engines. And the odd cylinders are on the driver side. The small block engines ( 318 ) have the distributor in the back, and the big block engines ( 360 440 ) are in the front. The rotor on the big blocks turn counterclockwise. The dist cap is usaully stamped with cyl 1 as a starting point.
Your crankshaft turns 2x times the camshaft. Put it this way as # 1 cylinder reaches TDC (top dead center) of the firing/compression stroke, and this will be after a (8 degs BTDC) spark to ignite the air/fuel mix, the # 3 cyl. will be at BDC of the intake stroke and as #1 begins its power down stroke, (during explosion of air/fuel mix), #3 begins its compression up stroke, the #4 cyl. will be coming down with #1 cyl. but #4 will be in the beginning of its intake down stroke, and #2 cyl. will be coming up with #3 but #2will be in its BDC of the exhaust stroke. Which has just fired previously to #1. 1342134213421342 etc.
Now the cam turns to open / close the valves;
In the outline above, #1 cyl. valves will both be closed. #3 cyl. will have the intake starting to close at this point. #4 cyl. will just be starting to open its intake valve, and #2 will be starting to open its exhaust valve. Is all this clear as mud? So as the crank makes one full rotation (in a 4cyl. engine) only the firing of one cylinder has happened.and at every rotation one cyl. will fire. So #1 at TDC then one full rotation, #1 back at TDC, but this TDC is half of its 4 cycles, (1)Intake, (2)compression, (3)power, (4)exhaust. this 1234 refers to the 4 cycles of the rotation not firing order.
if your car was starting up before you replaced the spark plug leads, my suggestion (as long as you put simlar plugs back in) is that the leads are around the wrong way........with the engine, if you have a 4 cyl, it does not fire 1-2-3-4, there is a particular firing order, eg 1-3-4-2, for a 4 cyl.
you did not state what vehicle you had, so i cannot tell you what the firing order is, and hence the correct position for the leads
if your engine run before you changed anything,and you are talking about a 3.0 engine, you have to be careful changing wires on this engine, you need toonly change one wire at a time,the distributor cap on this engine is just stupid. if you look under the cap you'll see that a wire on the one side of the cap actually has a contact that leads to the other side of the cap. cly 5 cyl 6 cyl 3 cyl 4 cyl 1 cyl 2 front of engine
if your looking at distributor cap from front of engine, two screws hold down cap. look at the screw closest to the front,from that screw second hole to the left is #1. firing order is 123456 #2 wire will be at that front screw on cap,keep installing wires counter clockwise.
I would replace Distributor Cap & Rotor; and especially all Ignition Wires (aka: spark plug wires) When it is damp outside, old and possibly cracked wires is the leading cause of engines not starting due to wires arcing (throwing sparks to other parts of the engine) and causes no spark where it is really needed and that is at your spark plugs so the engine will start.
Yes,an ohmeter across the two power leads(pimary) should yeild a fairly low resistance I'm not sure on the specs but it is just a winding so maybe 10 ohms,then test the secodary winding with one lead to either power lead and one lead to the high voltage post(the coil wire connection),should read about 10k ohms,you can go to autozone.com and register and they have a repair guide that should have the test specs.
the missfire can be caused faulty leads and spark plugs replace spark plugs and leads reset codes by removing engine fuse for 10 sec road test and check codes if the lean on bank 2 comes back you may have a faulty injector or intake manifold leak try some injector cleaner in the fuel overdose it it wont hurt