bad stutter at 2000 rpm, only power key on

[LGAFF]

Originally Posted by Spanky1965

I agree, but can you test the secondary actuators without removing the plenum?

You can peer in between the runners and watch them open.

[Spanky1965]

how without starting engine?

Originally Posted by Spanky1965

how without starting engine?

Jumper pin C17 on the ecm harness to a ground with the key on.

[Kb7tif]

Originally Posted by Jeffvette

Jumper pin C17 on the ecm harness to a ground with the key on.

Pink wire. Have you ever had the plenum off? On mine that was all working and the Secondary throttle linkages were broken off even though the actuators were working, the plates stayed closed-

[Dynomite]

Originally Posted by Kb7tif

Pink wire. Have you ever had the plenum off? On mine that was all working and the Secondary throttle linkages were broken off even though the actuators were working, the plates stayed closed-

OK...I corrected my previously assumed location of pin C17. My screw driver (I am assuming) is now pointing at the corrected location (that wire is pink with black strip on my 1991)

Thank you tccrab for the information

What are the pinouts for the ECM (which ECM is it?) for a 1991 ZR1

[tccrab]

How to check the secondary actuators without removing the plenum:

http://www.zr1specialist.com/HAT%20W...0Operation.pdf

Lots more interesting and useful reading at Marc Haibeck's website:
http://www.zr1specialist.com

TomC
"Crabs"

[Spanky1965]

thanks guys, lots to check out

[Spanky1965]

OK, by grounding the pink wire with the black stripe I popped the ecm fuse and car does not start...LOL

Originally Posted by Spanky1965

OK, by grounding the pink wire with the black stripe I popped the ecm fuse and car does not start...LOL

You hit the wrong wire then.

[Spanky1965]

duh...LOL (just kidding)