While I'm pulling the plenum....

[XfireZ51]

I'm in the process off doing a top end plenum/IH port job. I decided to ask the previous owner what he knew of the injectors and coil packs. At least since 2000, he believes the injectors and coil packs are original. I have no symptoms indicating there are any problems.
So the question for the ZR-1 gods is:

Do I replace either or both while I have the plenum off?

I plan on replacing stock plug wires with an MSD set.

[-=Jeff=-]

I'm in the process off doing a top end plenum/IH port job. I decided to ask the previous owner what he knew of the injectors and coil packs. At least since 2000, he believes the injectors and coil packs are original. I have no symptoms indicating there are any problems.
So the question for the ZR-1 gods is:

Do I replace either or both while I have the plenum off?

I plan on replacing stock plug wires with an MSD set.

Yes replace the Injectors and giev the old ones to me.. LOL this way I have some spares :thumbsup:

[Kevin]

coils are fine, if you really want you can put an ohm meeter on the injectors and test them. 13.5-15 is what you want

[XfireZ51]

Kevin,

"Fine" meaning leave coils alone? I had checked injectors last fall and they all ohm'd out at about 12.5 +/-.2

[bldavis11]

Leave the coils in if you aren't having problems.

[Kevin]

at 12.5 you're going to be needing injectors in the future. just catch them before they get to .2...It's NOT fun

[kenthompson]

Don't use the MSD wires unless you're going to custom make them. Mine are/were stupid long until I put other boots on them

[tomtom72]

I was new to this car and when my 90's injectors failed with the ethanol. If I had a garage that I could work in I would have left off a few items from the shopping list. If you own your garage then I would consider leaving the injectors & coils & wires as you say that they pass muster now. Besides now that you see that the plenum pull is really just a lot of detail work, the next time it will go so fast that you will be amazed.

Obviously the other side of that coin is when will the old stuff fail? In the middle of the summer when we are using our cars? That's when my stuff quit & it stunk as far as I was concerned; plus I had to wait for restocking on some stuff.

With the advent of Accel injectors & their price, I would consider doing the r&r now....they are sooo much less than the other alternatives....but that is a call decided by the budget at hand.

JMHO
:cheers:
Tom

[32valvZ]

I'm no one to give advice around here.....yet..:mrgreen: ....but I am doing my plenum pull now. I decided to just replace everything. ie: injectors, coils,actuators & all needed gaskets.... It just seems to me that while its off, do everything possible to make it run the best it can. I have 46k miles on mine........how many on yours?

I have around $760. invested so far w/o actuators.

[Pete]

Why replace anything if it don't need it.
If you do replace anything do wires and stick with the stock GM wires nothing will come close for $50.

Obvious someone has "lotso cash throw around syndrome":)

I have the cure.
Call me.

Here's what i would do under the plenum.
in this order

1: yank secondaries
2: yank SECONDARIES
3: YANK secondaries
4: YANK SECONDARIES
5: take out the secondaries
6: TAKE the freaking sacondaries out
7: change the rest of the stuff if it needs

Pete

[-=Jeff=-]

Why replace anything if it don't need it.
If you do replace anything do wires and stick with the stock GM wires nothing will come close for $50.

Obvious someone has "lotso cash throw around syndrome":)

I have the cure.
Call me.

Here's what i would do under the plenum.
in this order

1: yank secondaries
2: yank SECONDARIES
3: YANK secondaries
4: YANK SECONDARIES
5: take out the secondaries
6: TAKE the freaking sacondaries out
7: change the rest of the stuff if it needs

Pete

So are you sayign to take out the secondaries??
:sign10:

[Nick]

I'd leave the stock coils in there if everything is working as it should now. Once you get through your first (or second!) plenum pull, you'll see how really easy it is, and if you have a coil pack failure in the future, your plenum pull learning curve is not an issue.

As for the injectors...its only a matter of time...

[cuisinartvette]

I would do the injectors just to save yourself the headache of having to pull the plenum agian. THat day WILL come if you stil have the Multecs in there .

[Paul Workman]

Why replace anything if it don't need it.
If you do replace anything do wires and stick with the stock GM wires nothing will come close for $50.

Obvious someone has "lotso cash throw around syndrome":)

I have the cure.
Call me.

Here's what i would do under the plenum.
in this order

1: yank secondaries
2: yank SECONDARIES
3: YANK secondaries
4: YANK SECONDARIES
5: take out the secondaries
6: TAKE the freaking sacondaries out
7: change the rest of the stuff if it needs

Pete

Hello, Pete!

I gather you're referring to the secondary throttle plates?? That requires a chip change (to switch on the secondary injectors), no? I imagine the secondary injector relays can be "hard wired" too, in a pinch and willing to compromise, yes?

Lemmeno, cuz I'm one of about four newbies on the board about to go plenum diving and I don't want to have to do it again for a good while, if I can.:rolleyes: And, if you think pulling the secondary throttle plates is a good I-dear...I just might (to simplify things!)

P.

PS.
Got a chance to air out my Z this afternoon. Boy, what a nice cold aire day will do to the Z...What a BEAST!! :cheers:

P.