I don't know what I did the first time I had one out of TBI unit on my test bench but when I turned system on... or jumped A and B on ALDL it came flying out! There was no tiny movement! :yikes:

Weird how the GM test procedure warns not to use 12 volt?

I need to build another test bench to have one running all the time, becuase this one is down half the time while building systems...

Directly off ECM system voltage?

I don't think that is your issue. If it were you would be over 11-13 PSI. Read other thread.

Yes when it's buzzing it is completly closed and ready to pull the connector.

Any pressure on return line directly increases pressure on feed line. Remember when you pinched your return line?

You sure it's 12 volt? I wasn't... then read the IAC procedure .pdf and it says do not apply 12 volt... ?

My test bench is not running, I'm in the middle of building a harness or I would check for you. Pretty sure 12 volts will burn it up. It's a 5 volt signal... IIRC

I've done that on my test bench, the plunger extends all the way and pops out! :laugh:

I must have lost my post? I was going to check this when the kids IH TBI 16197427 Conversion is done.

When doing it this way you may have to turn engine off, wait a minute and restart to see...

Initial EFI Conversion System Setup for TBI systems, works with TPI/MPFI as well.

I know the first thing guys want to do when hooking up their fuel injection set up is to start it up and hear it...