Are Delco Injectors Available?

[jcruz]

Hi all,

I've got my 92 in for service and finally getting the fuel injectors replaced. The shop I'm working with naturally wants to use OE Delco injectors.

Are they available? Have a source?

I see Jerry's sells FIC injectors seem popular and other brands are available too.

Thanks,

John

[JG95ZR1]

Rockauto sells acdelco but not cheap compared to accell and FIC


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[jcruz]

Looks like they do! Thank you so much...

[tccrab]

The original AC Delco Multec fuel injectors were NEVER upgraded to be compatible with today's blended fuel.
They WILL fail.
Not IF or MAYBE, just WHEN.

Unless NCRS is more important than reliability PLEASE RETHINK YOUR PLAN.

'Crabs

[secondchance]

The original AC Delco Multec fuel injectors were NEVER upgraded to be compatible with today's blended fuel.
They WILL fail.
Not IF or MAYBE, just WHEN.

Unless NCRS is more important than reliability PLEASE RETHINK YOUR PLAN.

'Crabs

X 2.

[ram_g]

The original AC Delco Multec fuel injectors were NEVER upgraded to be compatible with today's blended fuel.
They WILL fail.
Not IF or MAYBE, just WHEN.

Unless NCRS is more important than reliability PLEASE RETHINK YOUR PLAN.

'Crabs

x3. The whole point of replacing the injectors is the original early ones weren't sufficiently capable today (i.e. ethanol tolerant). Why replace them if you're going with the same ones???

[jcruz]

Good advice, all.

While it's nice to see a path to getting the car running correctly again using a local shop, NCRS isn't a priority for me. I'd rather get new injectors that solve the problem long-term.

I haven't found another local shop that can handle the injector work. I was originally considering shipping the car to Haibeck and taking advantage of his expertise and services to get the most out of the car. I'll definitely rethink that option -- his engine refinishing service looks incredible.

http://zr1specialist.com/HAT%20Web/products/Engine%20Refinishing.htm

Thanks again for the feedback!

John

[ram_g]

Have you tried explaining the dilemma to the shop? Would be curious if they don't see the logic of going with aftermarket injectors, especially from a reputable source like Jerry's.

[dredgeguy]

Met an guy who had his car serviced at the local Chevy dealer and spent $7000 for service on a 90 with 20,000 miles including replacing injectors. 2 years later and not many miles more, he was back for new injectors....cost him $4000! I had my Tahoe serviced by the same Chevy dealer and went to speak to the service manager. Told him how can you sleep at night knowing your putting the screws to this unknowing ZR-1 owner. His answer was, "we are GM, we only use GM parts. Not my problem if they work long term or not". Just poor customer service.

[TX '90 ZR1]

Just the thought of my car getting close to a GM dealership makes me nervous!
:cheers:

[jcruz]

Have you tried explaining the dilemma to the shop? Would be curious if they don't see the logic of going with aftermarket injectors, especially from a reputable source like Jerry's.

I think they see the logic, but most local repair shops, even this one I used, really only want to work on OE equipment. They just don't have the expertise, software, tools, and knowledge to use after-market products.

Thanks for the feedback all! I'm so anxious to get my 92 running well again...

John

[jcruz]

Just the thought of my car getting close to a GM dealership makes me nervous!
:cheers:

Ditto

[Z51JEFF]

I am so very greatful I can work on my own cars.

[Matt B]

I think they see the logic, but most local repair shops, even this one I used, really only want to work on OE equipment. They just don't have the expertise, software, tools, and knowledge to use after-market products.

Thanks for the feedback all! I'm so anxious to get my 92 running well again...

John

Frankly, when they are in the position to pull the plenum properly and also reinstall it without damage to material or performance - they should also be able to plug in an aftermarket piece, no?
I know over here in Germany shops don't necessarily LIKE it when you bring your own parts because they make good money with selling ridiculously overpriced OE stuff. But in the end if the part has OE fit then it's the same plug'n'play process as it is for OE parts.
Or, to say it the other way around: if they feel uncomfortable to install aftermarket parts I'd have serious doubts if they are the right guys to work on my ZR (or any other car) AT ALL.

BUT (disclaimer) my thoughts are based on my local experience. Everything may be totally different in the US market. So it's just my 2 cents ;)

[Paul Workman]

Your 1st PLENUM PULL is a rite of passage!

My NOS (GM) injectors, installed by GM dealer, lasted about 2 years before the alcohol got um. Accel injectors from Summit Racing (part #150821) have been in the car for 11 years now with NO issues, what so ever!

And, the FIC injectors from Jerrys Gaskets come in a kit including gaskets and the injectors don't require you to grind off the little plastic indexing nub on the injectors inserted in the secondary ports.

This FORUM is you source for everything ZR-1 related. And, combined with a Factory Service Manual (aka "FSM") and a multi-meter (aka VOM) and a set of metric sockets and basic tools, you can tackle all but major engine or transmission work!

It's part of the fun of owning a historically significant piece of automotive history!

[DRM500RUBYZR-1]

An interesting tidbit of information.
Now this pertains to injectors for a C-4 LT-1.

Customer INSISTS on AC Delco replacement injectors.

We default normally to FIC, or Standard Motor Products.

As requested, we order the Delcos.
We happened to be doing another LT-1 and had Standards.

Opened each.

They were IDENTICAL, 100% identical except that the Delco ones were $20.00 more each, and the box had a differing part number.

On LT-5's, while Accell and others seem fine, I will only install new FIC's.
I NEVER install anything else and NO "rebuilds".

NO FIC. No injectors installed here.

Reason:
If they need to be replaced prematurely due to failure or performance I have to pay for that and that is not something that either I or the owner wants.
I have never had to replace an FIC new injector.
:cheers:
Marty

[Paul Workman]

An interesting tidbit of information.
Now this pertains to injectors for a C-4 LT-1.

Customer INSISTS on AC Delco replacement injectors.

We default normally to FIC, or Standard Motor Products.

As requested, we order the Delcos.
We happened to be doing another LT-1 and had Standards.

Opened each.

They were IDENTICAL, 100% identical except that the Delco ones were $20.00 more each, and the box had a differing part number.

On LT-5's, while Accell and others seem fine, I will only install new FIC's.
I NEVER install anything else and NO "rebuilds".

NO FIC. No injectors installed here.

Reason:
If they need to be replaced prematurely due to failure or performance I have to pay for that and that is not something that either I or the owner wants.
I have never had to replace an FIC new injector.
:cheers:
Marty

Sticking w/ what works - makes sense 2 me 2! However, if for any reason the FICs (stainless) are not available, my Accels (part # 150821 from Summit Racing) are running fine now after 10+ years and 40k miles. (The only thing is the little plastic indexing nub has to be ground off before the connector will fit on the injectors destined for the secondary ports. Nothing needed to be done on the injectors for the primary ports. But, from FIC or Jerrys Gasket, it's hard to beat getting the whole kit including gasket and O'rings, etc.!):cheers:

[XfireZ51]

I?ll be doing a writeup on my experience with FICs. I have used them to replace a set of Accels that were in my motor for 10 years. At that point, you may want to inspect the Accels. On my motor, the aerator in the nozzle had deteriorated to the point where the injector was just flowing a stream of fuel into the cylinder. Without the proper atomization, the cylinder ran lean leading to detonation and ultimately a cracked compression ring in #7 cylinder.
I had the complete set flow tested and 4 injectors had a poor flow pattern aside from the injector with failed aerator.
My advice would be to do an injector tip inspection on your next plenum pull. Even better, have them flow tested.

[wfot]

Marc is top tier, his work and knowledge of the LT5 is top 5% of everyone out there.

if distance is an issue there is Aaron Scott in GA...

John

[jcruz]

I'm "in the queue" to get my car to Haibeck...will finally get the car running properly.

In addition to the injectors and a few other problems, I'm still trying to track down the mystery clunks coming out of the rear: https://www.youtube.com/watch?v=fkpIYMVHd9Q

John

[Z51JEFF]

I?ll be doing a writeup on my experience with FICs. I have used them to replace a set of Accels that were in my motor for 10 years. At that point, you may want to inspect the Accels. On my motor, the aerator in the nozzle had deteriorated to the point where the injector was just flowing a stream of fuel into the cylinder. Without the proper atomization, the cylinder ran lean leading to detonation and ultimately a cracked compression ring in #7 cylinder.
I had the complete set flow tested and 4 injectors had a poor flow pattern aside from the injector with failed aerator.

Oh $hit,Ive had Accels in my car for the past 12 years.

[XfireZ51]

Oh $hit,Ive had Accels in my car for the past 12 years.


I'm just giving you a "heads up". Worth having a look when u have the opportunity and if you may be having an issue. Its going to be dependent on the miles you drive as well.

[Bob Eyres]

All of this begs the question, why is GM selling injectors that are incompatible with modern fuel?

You would think that there would be a parts update with Delco injectors changed to stainless.


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[tccrab]

I spoke at length with the tech support folks at AC Delco about 10 years ago when I was wondering the same thing having had to change my failing AC Delco Multec fuel injectors.
I was told that this particular series of fuel injectors were designed before ethanol was ever considered to be used as an additive to gasoline.
They never re-engineered these specific fuel injectors because they weren't used in enough cars to absorb the cost of the update. And they knew that there were ethanol compatible replacements in the aftermarket.

Why they continue to sell these is a mystery, especially if they *know* they aren't compatible with today's gasoline. Perhaps they made so many back then that they're still selling off new-old stock.
:dontknow:

'Crabs



All of this begs the question, why is GM selling injectors that are incompatible with modern fuel?

You would think that there would be a parts update with Delco injectors changed to stainless.


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[Erik]

I?ll be doing a writeup on my experience with FICs. I have used them to replace a set of Accels that were in my motor for 10 years. At that point, you may want to inspect the Accels. On my motor, the aerator in the nozzle had deteriorated to the point where the injector was just flowing a stream of fuel into the cylinder. Without the proper atomization, the cylinder ran lean leading to detonation and ultimately a cracked compression ring in #7 cylinder.
I had the complete set flow tested and 4 injectors had a poor flow pattern aside from the injector with failed aerator.
My advice would be to do an injector tip inspection on your next plenum pull. Even better, have them flow tested.

My Accels were ten years old and just got swapped out. Incredible improvement, going with FICs. Like a new car.

[Z51JEFF]

I think it's time to replace the Accels with some new FICs.

[Paul Workman]

x3. The whole point of replacing the injectors is the original early ones weren't sufficiently capable today (i.e. ethanol tolerant). Why replace them if you're going with the same ones???

X4! (ask me how I know!!)

Yep. FIC (Jerrys Gaskets has the whole "kit" including gaskets and O-rings, etc.)
OR Summit Racing for the Accel #150821 (but you have to remove the little plastic indexing nub on the 8 injectors headed for the secondary ports: takes maybe 5 minutes with a Dremel - bit longer w/ a file.)

[XfireZ51]

I think it's time to replace the Accels with some new FICs.

Whichever injectors u upgrade to, invest just a few extra $$ and have them flow tested b4 installing them. Then do your own matching of injector pairs. The difference in how the motor runs is night and day.