engine idles wierd

Reply Subscribe

Thread Tools

Search this Thread

Feb 21, 2014 | 02:24 AM

#16

marine09

Thread Starter

Freshman User

Joined: Feb 2014

Posts: 29

Likes: 0

Actually, the cylinder does not need to be at top dead center for the valves to be closed. Only the intake would be closed. If you take the rockers off, the springs will close the valves no matter where the piston is.

Feb 21, 2014 | 02:29 AM

#17

Brnfree

Laughing Gas

Joined: Apr 2013

Posts: 1,049

Likes: 65

True about removing the rockers, but wouldn't both valves be closed at the top of the compression stroke?.

Still, I wonder if TDC would provide any insurance?

Feb 21, 2014 | 02:54 AM

#18

marine09

Thread Starter

Freshman User

Joined: Feb 2014

Posts: 29

Likes: 0

It would be hard to get it right at tdc to have both valves closed. The rockers are more of an insurance

Feb 21, 2014 | 09:21 AM

#19

Filthy Beast

Postmaster

Joined: Mar 2011

Posts: 2,698

Likes: 7

From: Taxachusetts

You could: Take out the spark plug and feed some rope into the cylinder, then get that piston at TDC.......if you don't have the air accoutrements.

I know most parts stores sell an "on vehicle" valve spring compressor.

Good luck.

Mar 13, 2014 | 08:17 PM

#20

marine09

Thread Starter

Freshman User

Joined: Feb 2014

Posts: 29

Likes: 0

Ok. Valve spring replaced. I also pulled the distributo to make sure it wasnt messed up. It was fine but i firgot to mark it. So i redropped it with the #1 cylinder at 10° btdc. Lined the #1 spark plug wire with the rotor and the truck started right up. But now she back fires through the carb on occasion and has lost a lot of power.

Mar 14, 2014 | 12:08 PM

#21

Filthy Beast

Postmaster

Joined: Mar 2011

Posts: 2,698

Likes: 7

From: Taxachusetts

Have you checked the timing again to be sure?

Plug wires in correct firing order?

Might want to re-check your carb settings with a vacuum gauge too, but after the timing is set right.

Mar 15, 2014 | 02:19 AM

#22

marine09

Thread Starter

Freshman User

Joined: Feb 2014

Posts: 29

Likes: 0

Yea i figured it was the timing. My timing light broke during a house move. I went and got one today and it was firing right at the atc mark. So i put it at 12° btc. Runs like a champ now. Thx for all the help.