I have a 1992 4x4 Truck Just replaced the engine.

[Antairus]

I have a 1992 4x4 Truck Just replaced the engine.
All new Vaccume lines.
It starts up fine but has a serious surge and high idle.
I thought the Pros would know exactly what the issue is.
Please see Video
http://s974.photobucket.com/albums/a...t=IMG_0379.mp4

 

[snobdds]

The link does not work

Also need to know what type of engine you have - 22RE, 3.0 3VZE etc...

 

[Combat Chuck]

Welcome to 'Mud!
<- (Official Ih8mud Salute)

Surging and high idle sounds like a loose vacuum line somewhere, but like the previous poster said, we'll need to know more about what motor you're running.

Good luck!

 

[Antairus]

Sorry 22re.

The engine Jumps to 2k rpm then down to like 1.3k rpm
continuously

 

[Antairus]

IMG_0379.mp4 video by Mike_King_72 - Photobucket

 

[Antairus]

Bump

 

[Combat Chuck]

Sorry. Saturdays are slow here.

Looks like your vacuum is covered.
I would check your injectors, and fuel relay.
Also, Spark plugs could cause rough idle, but I suspect you may have a tired MAF sensor.

 

[snobdds]

I bet your idle is set too high. Turn down your adjusting screw until you get to about 800 RPM's on a fully warm engine.