I am so stumped, i have never had a challenge like thos

[Paiste402]

Ok, i found out that my motor has only been running on 5 pots instead of 8. Its pots 2,3 and 4. But heres the twist; the leads are sparking, a nice blue spark. Ive checked the dizzy cap and its all good. Ive checked the gap on the plugs which are fine. I even switched a firing plug with a non firing and there is no difference. DIJM8 thinks its the LPG system, which may be since its 2,3 and 4 in a row.

i have no idea how to solve this.

[Tom_1569]

Leads/Plugs can spark fine when removed, but wont fire under compression (installed), but if swapping plugs and leads and it still happens on those cylinders then you can eliminate that.
Dizzy and Coil is a possibility, it may not be strong enough on those cylinders to spark under compression, but unlikely.
Do a compression test to make sure theirs not something wrong with those cylinders, could be stuffed rings, unlikely... more likely to be a cracked head gakset between those cylinders if compression is low.
Other wise yes it could be LPG not getting down their for some reason.... Sorry dont no **** about LPG.

[Paiste402]

Ive got an oil pressure gauge and its getting great readings if that adds anything.

oh and also, when i was doing my exhaust manifold gasket, on the drivers side i undid a bolt to get the gasket out and all my coolant flowed out of it. It was only the one bolt that did it i believe but im sure its not normal...

[Tom_1569]

Originally Posted by Paiste402

Ive got an oil pressure gauge and its getting great readings if that adds anything.

Shouldn't really relate to your ignition problem, but good to double check you are getting oil pressure.
Have you got a compression tester?

[Paiste402]

no but my dad does, what about that coolant problem when changing my exhaust gasket. Could that be a head gasket problem?

[Tom_1569]

Originally Posted by Paiste402

Ive got an oil pressure gauge and its getting great readings if that adds anything.

oh and also, when i was doing my exhaust manifold gasket, on the drivers side i undid a bolt to get the gasket out and all my coolant flowed out of it. It was only the one bolt that did it i believe but im sure its not normal...

Im not familiar with these motors, but Im pretty sure thats not normal lol.

[Tom_1569]

Originally Posted by Paiste402

no but my dad does, what about that coolant problem when changing my exhaust gasket. Could that be a head gasket problem?

Grab the compression tester and do the test and post back.
Im not to sure on the coolant leaking out, ill leave it for someone else to answer.... But i dont think it should be happening, and it maybe a crack somewhere on the head, or could be the head gasket... A compression test would answer a bit, also you can get a mechanic to hook up a thing to the radiator and it will tell you if the head gasket is gone.

[burnz]

check your firing order
1-2-7-8-4-5-6-3

[Paiste402]

Originally Posted by burnz

check your firing order
1-2-7-8-4-5-6-3

did that, all in the right spots. I took the dizzy cap off as well and checked inside of that and all good.

[Classifi3d Calais]

Originally Posted by Paiste402

Ive got an oil pressure gauge and its getting great readings if that adds anything.

How high is the oil pressure?

iv got another car running on 3 cylinders of the 4 as it needs a new piston ring. Not only does it run ****, but iv got blow by (check for smoke coming from the oil. Its exhaust smoke) and the oil pressure went from 40psi to 60psi when the ring broke.... its a possibility i guess

[delcowizzid]

what do you mean by 2 3 and 4 do you mean all on one side of the engine cause 2and 4 are on the same side but 3 is on the other side

[ucwepn]

is the manifold bolt on the same side as the cylinders that are not firing? (could be a cracked head)