P38 I want to run on 7 cylinders

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awhitwell

New Member
Posts
12
Location
North Yorkshire
I want to run on 7 cylinders with one cylinder with the spark plug out.
My 200k mile 4.0l P38 has a block crack on a rear pot that blows the water out when warmed up. Had a new head as the old one showed up a crack on test but I still get too much coolant pressure. I don't want to spend £2,500 on a new block for a car worth £1500.
The idea is to put a modified spark plug in with a silencer (bit of pipe, tin, wire wool) and to pinch the lpg feed. It runs fine but noisily with no spark plug. There is now no pressure to blow water out or suck it in- the K-Seal might even have a chance to work.
The questions are - has anyone run like this for any time? What might go wrong - perhaps anti knock sensor alarm, Lambda sensor problems, crank imbalance, explosive gases into the engine bay?
 
I want to run on 7 cylinders with one cylinder with the spark plug out.
My 200k mile 4.0l P38 has a block crack on a rear pot that blows the water out when warmed up. Had a new head as the old one showed up a crack on test but I still get too much coolant pressure. I don't want to spend £2,500 on a new block for a car worth £1500.
The idea is to put a modified spark plug in with a silencer (bit of pipe, tin, wire wool) and to pinch the lpg feed. It runs fine but noisily with no spark plug. There is now no pressure to blow water out or suck it in- the K-Seal might even have a chance to work.
The questions are - has anyone run like this for any time? What might go wrong - perhaps anti knock sensor alarm, Lambda sensor problems, crank imbalance, explosive gases into the engine bay?

Scrap the heap of ****
 
Please forgive me for being so polite. But that is the worst idea i have heard in many many years. You want to run on 7 cylinders and put a silencer in the redundant plug hole. Oh deary, deary me. :doh::doh::doh:
 
Seriously I needed a giggle 200k admit defeat and feel lucky to have got so far in a p38
 
why not route the gas(not lpg, but from compression) from the cylinder to the air tank, that way it will help your eas compressor and prolong its life, you will get codes for misfire on cyl '8' tho, try stcking a bulb on the wires to that injector and it will think its firing, obviously then it wont be injecting fuel either!!

incidently mine only runs on one cylinder at any one time!!!

good luck and dont forget to change the lpg settings or it will run a bit rich!! there should be a setting in the software to drop a cylinder/injector!!

regards

gav
science co-ordinator at looney tunes lpg conversions, V7 specialists!!
 
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