missing on couple cylinders

[federal39]

the 50 dodge pickup missing on the two front cylinders has 110 comp and good spark tried couple spark plugs and the two front cylinder don't hit could it be the intake leaking around buy the head I'm lost on it thanks 

[Plymouthy Adams]

check your firing order........

[federal39]

We did 153624 should be the one 

 

 

[Merle Coggins]

With 110 psi compression on the two suspect cylinders it’s unlikely that a head gasket is the culprit. You’re either not getting the spark properly or there’s a total blockage in the intake manifold feeding the front 2 cylinders. I’d first double check the plug wires to be sure they’re not crossed/reversed.

[federal39]

The spark plug are wet the firing order is right all the cylinder are 100 to 115 the truck sat for 30 years 

[bach4660]

pull the number one plug, connect the lead, clamp or secure the plug to the block and crank it over. If no spark you have a problem with the lead or the Distributor.

[federal39]

We have good spark 

[Don Coatney]

There are 3 things required for good combustion. Good compression, fuel, and spark delivered at the correct time. What are you missing?

[federal39]

We check the comp and we got only 75 pounds the valves must be sticking 

[federal39]

On the front two we had all the spark plugs out

[Don Coatney]

2 hours ago, federal39 said:

We check the comp and we got only 75 pounds the valves must be sticking 

 

I am a bit confused. In your first posting you said the compression was 110. If you have a valve sticking you would have zero compression in that cylinder.

 

[Plymouthy Adams]

If one compression reading is good and later the compression is lower, you need to investigate the case and repair said condition.  I figured something was amiss when you said you had spark, fuel and firing order is correct...we can only suggest based on facts presented.

[federal39]

Just looked a the plates they say 1968 so it sat for a few years I jess is to tear into most likely the valves or rings from sitting who know why it was parked

[Don Coatney]

Did you follow the instructions given on the compression how to sheet I posted? What is the difference of a wet and dry compression test? I wish you good luck on your project.

[federal39]

never did it wet 

he had hard any when he started with it he put oil down the cylinder to get it to run I'm just trying to help him out it smokes a lot when it is running the ring could be stuck some truck sat at a old junk yard from 1968 

[John Rogers]

I would check to see if the spark plug wires are arcing / shorting on something or even on eachother. Start it in the dark and take a peek, if they are arcing your see it plain as day.

                      John

Edited May 13, 2018 by John Rogers

[David A.]

I had a similar problem on a 1938 Buick. It turned out to be a bad intake manifold gasket. It was pulling plain air in rather than the fuel air mixture. When I would spray starter fluid near the leaking gasket it would pick those cylinders up. Just watch out for the fan and for safety’s sake, I did it when I first started the engine before the exhaust manifold got hot. Good luck! Some problems can be a real bear to figure out. 

[federal39]

we had good  spark at the plugs I crossed them with a screwdriver I'm thinking that the rings are stuck from sitting for so long the old guy is trying to get it running so he can sell it 

 

it is a 1950 1/2 short box with a fluid drive  he can not shift one of the linkage on the transmission 

[SCD]

How about a crack in the distributor cap or crack in rotor.

[federal39]

Cap is good rotor good I'm thinking it is low on compression after the oil got out the cylinders he put oil down the cylinders to get it to run