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Discussion Starter #1
Read in other posts about swapping the FI connections and just want to be sure that its safe to do this.
Trying simple things I can do to eliminate possible reasons for weak/dead cylinder. Mechanic says I'm losing compression in #3 cylinder. To me, it revs and idles fine. Picks up speed okay, but seems a little short on power. Pulling plug wire on 3 makes very little difference in idle. Pulling 1, 2, & 4 makes a big difference. Will be trying to swap plug wires at distributor and plugs. I'm hoping its just a bad wire or injector.
 

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Are you referring to the fuel injectors themselves? They screw into the intake manifold. My answer is that as long as you know which is which and are careful with the tubing you should be fine. To do it correctly, you should loosen all the tube hold downs, and loosen the #3 and 4 tube at the pump first. Then loosen the tubing connector at the injector and carefully manouver it out of the way. Then get a dead socket and remove the injectors. They are pretty robust so you aren't likely to wreck anything.

You might want to soak them a few days in carb cleaner (or brake cleaner). Blow them out real well with clean air.

I would not recommend taking the injector apart. There a lot of little washers and shims that I suspect are there for a purpose and the potential to mess something up is greater than the potential to fix it...

Good luck!
 

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I assume you are asking about EFI - Bosch L-jet or Motronic. (It helps to specify which model car you are working on) Not a problem. The injectors all squirt at the same time - in other words they are not 'timed' to squirt at any specific point in the piston/valve movement.

The links in reply #3 in this thread has some info you might find useful.

SPICA (mechanical FI) I know nothing about.
 

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Discussion Starter #5 (Edited)
I assume you are asking about EFI - Bosch L-jet or Motronic. (It helps to specify which model car you are working on) Not a problem. The injectors all squirt at the same time - in other words they are not 'timed' to squirt at any specific point in the piston/valve movement.

SPICA (mechanical FI) I know nothing about.
Ooops! forgot to mention that. 87 Quad Bosch L-jet. Actually it was one of your posts about a bad fuel injector that gave me the idea to check this.
Forgive the ignorance, so since they are not timed, it is safe to swap them correct?.?
 
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