No or low spark #4 and #7 plugs

[ZR1Vette]

Your doin good.... Jeff and Tom have covered things in comments...removing fuel rail/injectors... key is you want to remove the fuel rail with the injectors attached thus what you will be doing is removing the injectors from the injector housing seats. Again, using a simple tool such as shown here>>>


just work front to rear and rear to front gently and slowing prying up a little at each pry spot and injectors will slowing unseat. Do NOT just pry up at one spot until injectors pull out because you take a chance to pulling an injector from the fuel rail which means you could damage the injector seat clip holding the injector to the rail...in this pic the clips can be seen where the injectors seat into the fuel rail.



You will need (as in a strong suggestion) to replace the O rings for the primary injectors ONLY (secondaries come with O rings as part of the injectors themselves)... I use a tool (Sears) as shown to carefully pull out the O ring...then clean seat with cloth soaked in parts cleaner...then install new O rings.


Found a little trick (for me anyway) to re-install the back two ignition module plugs... after you lay down the plenum and install the two front ignition module plugs and prior to reconnecting the front (under the plenum) vacuum line simply push forward the plenum slightly (as shown here)>>


and install the plugs (that little 1" movement forward makes getting to the plugs etc sooooo much easier)...once plugs are installed then slide plenum back into position and slightly lift front of plenum to install the vacuum line.

Hope this helps a bit

[DTZ ZR1]

Just finished up with putting everything back together. Changed plug wires, coil packs, injectors and cleaned up the valley. Thanks for all the info, you all made this job very easy for me.
The car runs great, I did not have time to take it out. I will tomorrow if the weather is good. Again, thank you all.

DT

[flyin ryan]

Originally Posted by DTZ ZR1

Just finished up with putting everything back together. Changed plug wires, coil packs, injectors and cleaned up the valley. Thanks for all the info, you all made this job very easy for me.
The car runs great, I did not have time to take it out. I will tomorrow if the weather is good. Again, thank you all.

DT

Awesome, that's great so far .

[tomtom72]

Schweeeet Deal!

[Kb7tif]

Originally Posted by ZR1Vette

Your doin good.... Jeff and Tom have covered things in comments...removing fuel rail/injectors... key is you want to remove the fuel rail with the injectors attached thus what you will be doing is removing the injectors from the injector housing seats. Again, using a simple tool such as shown here>>>


just work front to rear and rear to front gently and slowing prying up a little at each pry spot and injectors will slowing unseat. Do NOT just pry up at one spot until injectors pull out because you take a chance to pulling an injector from the fuel rail which means you could damage the injector seat clip holding the injector to the rail...in this pic the clips can be seen where the injectors seat into the fuel rail.



You will need (as in a strong suggestion) to replace the O rings for the primary injectors ONLY (secondaries come with O rings as part of the injectors themselves)... I use a tool (Sears) as shown to carefully pull out the O ring...then clean seat with cloth soaked in parts cleaner...then install new O rings.


Found a little trick (for me anyway) to re-install the back two ignition module plugs... after you lay down the plenum and install the two front ignition module plugs and prior to reconnecting the front (under the plenum) vacuum line simply push forward the plenum slightly (as shown here)>>


and install the plugs (that little 1" movement forward makes getting to the plugs etc sooooo much easier)...once plugs are installed then slide plenum back into position and slightly lift front of plenum to install the vacuum line.

Hope this helps a bit

Hello can you yell me about how far down in the housing are the seals for the primary's?

[tomtom72]

I'm guessing you're referring to the early style 90-92(?) primary injector O-rings like the one in the picture by Mike?

If so, then if you look at your I/H primary holes, the O-ring is just below that polished area. Maybe 3/16" below the top surface.


Any Help?

[ZR1Vette]

For a picture... primary injector site on left still has O ring in it and the one on the right is removed and you can see the O ring seat area>>

[secondchance]

Originally Posted by DTZ ZR1

Just finished up with putting everything back together. Changed plug wires, coil packs, injectors and cleaned up the valley. Thanks for all the info, you all made this job very easy for me.
The car runs great, I did not have time to take it out. I will tomorrow if the weather is good. Again, thank you all.

DT

Terrific!