Re: Poping 258 engine Any suggestions

["Jim Blair" <carnuck@xxxxxxxxxxx>]

A: Another quick thought is something may have fallen into the intake and is 
jamming the intake valve open. I had that happen on a Datsun B210 and dopey 
me, thinking it was just a bit of carbon, I tried to rev it through. Turned 
out to be the "missing" wingnut from the carb! DOH! (it had a nut holding 
the air cleaner on when I got it) Ended up swapping heads and a piston to 
make it go again, but compression was uneven after that due to the cylinder 
wall score.


From: Teamamc <teamamc@xxxxxxxxxxx>
Subject: Poping 258 engine Any suggestions
To: mail@xxxxxxxxxxxx
Message-id: <007601c58b5c$0fa94210$6500a8c0@quicker>

I have an 81 Concord. 258 auto air.
At Idle the car gives off a poping sound through the carb.
If I pull number 6 wire the poping goes stops.
If I put the wire back on and rev the engine the pop turns into a violent
bang through the carb.

I have changed plugs wire cap and rotor.
Adjusted timing. Compression is 145-150 across all cylinders.

It appears to be timing but I can't figure out whats left.
no matter where I put the distributor the pop is present.
With all 6 wires on the engine will idle.
As soon as you pop it in to gear the engine bangs and stalls.
If I remove #6 wire  I can put the car in gear and drive it.

Any Idea's.
I am stripping the car but want to make sure the engine runs well before

pulling.