1986 NA Rough Running and VSV Connector Problem

[dlfred]

I recently got my 1st Supra, what a great car. It needs some work, I am following up a Mechanic that did a HG. I have several issues and already have learned allot through the use of the search tool.

The car will not pull hard and feels like it has a cylinder not participating throughout the rpm range. If you run along at 3000 rpm you can feel the cylinder jump in.

I have a VSV that has the electrical connector with a wire broken off flush so it is not connected. The vacuum lines are hooked to it. Do you think this is the problem?

I did check the plugs and they look new.

 

[dlfred]

Well the VSV wire is repaired, all switches and lines are plugged in.

It still will not pull hard and doesn't feel like it is running on all 6 unless you hold the throttle steady or roll out of it just a little. Any suggestions on where to start would be appreciated. I will double check plug condition and spark.

What would you check if I there is good spark?

 

[cuel]

Compression test. All injectors working? One either clogged or dead will give you the same symptoms. Engine ear will tell you if they're working or not. How's it idle?

 

[dlfred]

Thanks. What is the test for the Injectors? I am getting ready to pull the plugs. I appreciate your input.