rebuilt engine dead #3 cylinder

[86chevyk20]

hey guys,
so i rebuilt my 355 this past winter. it was my first complete rebuild but i did it the right way, total macheine work ffrom top to bottom, its a 355 with flat tops, 882 heads,comp cam max lift 444 and stock compression. The truck hasnt been drivin, i cant drive it in my area and have no where to take it to drive soo just idel time no miles.


It sounds like it has a slight miss in the drivers side, u can here it in the exuahst and when u pull wires when in runs they all change BUT #3. its getting spark.

I have to do a compression test, but its all 100% brand new!!!!! im scared ill have to rip it apart again.

What could this posslily be?
What should my compreesion be?
again its only #3 and its a slight miss, not like u gota broken plug or anything, when u rev it ,it chugs like a small miss.




help please?

 

[J Knight]

hey guys,
so i rebuilt my 355 this past winter. it was my first complete rebuild but i did it the right way, total macheine work ffrom top to bottom, its a 355 with flat tops, 882 heads,comp cam max lift 444 and stock compression. The truck hasnt been drivin, i cant drive it in my area and have no where to take it to drive soo just idel time no miles.


It sounds like it has a slight miss in the drivers side, u can here it in the exuahst and when u pull wires when in runs they all change BUT #3. its getting spark.

I have to do a compression test, but its all 100% brand new!!!!! im scared ill have to rip it apart again.

What could this posslily be?
What should my compreesion be?
again its only #3 and its a slight miss, not like u gota broken plug or anything, when u rev it ,it chugs like a small miss.




help please?

"Possible" misadjusted valve or valves. Is the dist new?

 

[86chevyk20]

and i did check the plugs i am getting spark at the plug, again its never been drivin just idel hours. the plugs were kinda sooty not bad. changed it with a plug from other cyld and it was thje same

 

[86chevyk20]

everything is new, yes dist is new. could it be a over ajusted?? or under?? i dont here any valve noise

 

[J Knight]

everything is new, yes dist is new. could it be a over ajusted?? or under?? i dont here any valve noise

If it was under adj it would "tick", might be over adj.

 

[86chevyk20]

ill check it

 

[Blackdog3]

I had an issues like that once, it was a bad cap.... for some reason 2 of them died in less then 200 miles. Got a different cap and the problem went away so far.

 

[J Knight]

I had an issues like that once, it was a bad cap.... for some reason 2 of them died in less then 200 miles. Got a different cap and the problem went away so far.

Agreed, new parts can easily be bad.

 

[86chevyk20]

i have 185 psi in all 8 cly. i replaced the plugs and got good axccell wires. runs likema bear now

 

[crazy4offroad]

 

[J Knight]

i have 185 psi in all 8 cly. i replaced the plugs and got good axccell wires. runs likema bear now

Good deal!! Glad it was a simple fix.

 

[Blackdog3]

Sweet!

 

[HotRodPC]

"Possible" misadjusted valve or valves. Is the dist new?

That is exactly what I was thinking. If the vavle is adjusted to tight, its letting a valve stay open and the cylinder is not building compression.

 

[HotRodPC]

DOH, I'm late to the party. After posting I realized I missed some posts. Glad you got it figured out.