1993 nh pajero 3LTR is running on 5 cylinders, i have changed the plugs,leads,dizzy cap,rotor button,lifters. you can pull number 1 lead off the plug and there is no change in the running of engine you pull any of the others off and it runs worse,which means number 1 is not firing. i have compresion number 1 plug sparks from lead, so i dont know what else to look at to fix the problem i also checked to make sure i had power to the injector. CAN YOU PLEASE HELP ME WITH THIS PROBLEM ANYTHING COULD BE A BIG HELP THANKYOU
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Re: 1993 nh pajero 3 LTR running on 5 CYL
Hi Roy, You say you have compression? is it well within the range of the other cylinders? if it is i.e. around 100 psi then possible bent or sticking valve? although you have a spark when plug earthed out of head is there possibly some foreign matter isolating the plug or is it the plug itself breaking/tracking down when in situe? Failing all these, try a small amount of fuel direct into the cylinder to see if it fires briefly (Not too much just a couple of mls) Maybe possible Head gasket failure? (I doubt it as all other cyls fine) Can't think of anything else I would try, Hope this helps! Paul 'W' Onyer~EDson(:0)~[><U.K.
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If dizzy is still in place and leads are connected.
Remove dizzy cap and get someone to give starter short kick with ig key making sure hands are clear of moving partsand not touching leads. if rotor button goes clockwise then set to top dead centre with timing mark on pulley rotor button should point to no. 1 so by following plugs you can work out firing order. heads usually have cylinders numbered .
pull no 1 plug and turn the crank until you feel compression under your thumb over the plug hole.. Keep going until the timing mark lines up with the pointer ( about 10 degrees advanced) check and ensure that the point gap are set correctly Place the rotor button facing no 1 plug lead or a mark in the body of the distributor. (hacksaw cut across the lip) place the distributor in the hole allowing for the rotor button to turn because of the cut of the gears . Turn the ignition on and turn the body of the distributor until you see/hear a spark across the points. lock the distributor at this point (This should be just as the points open in the direction of rotation) fit the cap and fit the leads in the firing order.This will get the engine started and by the use of a timing light on no 1 cylinder lead you can set the timing exactly.
Find the end of the plug wire for cylinder 1. Place the plug wire into the distributor cap. Rotate the Crankshaft until Cylinder #1 is TDC. align the rotor in the distributor cap with plug wire number 1.
There are 2 3.0L engines used in 1989. One has a flat distributor cap with the plug towers coming out sideways and the other has a conventional cap with the plug towers protruding vertically. Both have a firing order of 1-2-3-4-5-6 (Gee, that's hard one to remember!... LOL ;) ) The ditributor cap should have the cylinder numbers cast into it at each plug tower - most Mitsubishi caps do. The cylinders are numbered 1-3-5 on the right bank and 2-4-6 on the left bank.
find your firing order, it may be something like 153624
take the dizzy cap off and rotate the motor to see what direction the rotor turns(it should be clockwise)
now remove the number 1 spark plug and bring the piston up to top dead centre on the compression stroke, to do this put your thumb or finger over the plug hole and rotate the motor by hand, when you feel pressure on your finger the motor is pushing the piston up in that cylinder, if you poke a screwdriver down in the hole you will feel the piston coming up. when it reaches the top and the screwdriver is not coming up any more the piston should be on top dead centre.
have a look at the rotor to see where the brass pointer is poing to on the distributor body, mark the side of the distributor housing and sit the cap on to see which plug lead lines up with that point, that will be number one piston firing position.
if the rotor was turning clock wise the number 5 plug lead would go to that terminal, if the firing order is the same as the one that I have told you then continue on until you have the 6 leads in the right order.
usually the pistons run from front to back like 123456
for an inline 6 cylinder
hope this has helped
no your problem is definately the dizzie cap, as i found out to my cost on a lansia beta. any kind of crack in ur dizzie will cause probs. best way to find out is park your car in the dark open bonnet with engine running then get a mist spray with water in it spray at dizzie and you will see a slight yellow arc around the crack! any crack in bakelite distributors leads to loss of one or more banks
The firing order is 1, 3, 4, 2. If all the leads have been pulled off the dizzy cap, you'll have to remove No 1 spark plug (leave it threaded into the plug hole by 1 turn) and the dizzy cap. Turn the motor over by hand in the clockwise direction and listen for air being forced out of the No 1 plug hole. When you start to hear that, it means you are approaching TDC on No 1 cylinder. Now look at the front crankshaft pulley and stop turning the engine when the mark on the pulley is close to the marks on the timing belt cover. It doesn't have to be exact (unless you've removed the dizzy). Now where the dizzy rotor is pointing is where No 1 lead has to be fitted. Observe the direction of rotation of the rotor and the next point it comes to will be where you fit No 3 lead; No 4 lead next; and finally No 2 lead.
remove the dizzy cap, crank motor over to find out the rotation of the rotor. Remove the no.1 spark plug and bring no.1 piston up to top dead centre on compression stroke, mark side of dizzy body where the end of the rotor points to, replace dizzy cap and see which lead it lines up with.
that will be your no.1 lead, find the firing order and put the leads back on the dizzy cap in the direction of the rotors rotation, run those leads to the corresponding plugs and it should start.