Shuddering at idle

[beastpath]

I finally got my truck running yesterday from the ignition circuit problem that my MSD box was giving me.

It starts and runs, but shudders like crazy at idle and in low RPMS.

 

Yesterday I changed out the ignition coil, cap and rotor, and this morning I changed out the spark plugs(NGK) and spark plug wires.

 

Still shudders under 2000rpm and at idle, and there is less power when accelerating at lower rpms.

 

Does this sound like a timing issue?

[beastpath]

Ok - still can't figure this out.

 

Ran the codes and they say 55 - all systems are go. Timing is dead on 15 btdc.

 

Changed the fuel filter and air filter (has a full tune up now because of this, lol) - still shakes at idle. Motor mounts look fine.

 

When revving the engine the shake goes away.

 

Any ideas?

[pathfinderfisherman]

Ok - still can't figure this out.

 

Ran the codes and they say 55 - all systems are go. Timing is dead on 15 btdc.

 

Changed the fuel filter and air filter (has a full tune up now because of this, lol) - still shakes at idle. Motor mounts look fine.

 

When revving the engine the shake goes away.

 

Any ideas?

I member reading a post that helped me once.... might help if nothing is shorting under the cap since its new

http://www.nissanpathfinders.net/forum/index.php?showtopic=5194

 

.....oh make sure the connections are all clean to msd and out..... that way there is the proper signal going in to the box....

Edited May 31, 2010 by pathfinderfisherman

[beastpath]

Cap is new

 

I'll check the MAF tomorrow thanks!

 

and I disconnected the MSD for now.

Edited May 31, 2010 by beastpath