Jump to content

3.4 Fuel Injector Differences


fleetwoodguy79

Recommended Posts

You can use ANY year DOHC 3.4 injectors in any year DOHC, they are all compatible.

 

The 1991-93 came from the factory bad. They were loud(clicking), and they made the car stall out after a few thousand miles(More-so on the 5-speeds, but I have heard of an auto stalling as well). GM made a recall for them, and my guess is about 60% got the recall. And I'd say of the 40% remaining, 20% have had their injectors changed due to normal maintenance. For the last 20, life sucks. The ones you buy from an auto store for a 91-93 won't make the car stall, but they will still be loud(I don't notice mine unless my hood is up).

 

The 94-95 were the same as the earlier years, but they fixed the stalling. IIRC they are also loud.

 

The 96-97 were rated 1# smaller(no big deal on a stock or slightly modded motor), and they fixed the stalling and run near silent. I have a srt of 6 of these, but I haven't had time to put them in. I would like to however, considering mine are loud and the car stalls out.

Link to comment
Share on other sites

This should help, it an orginal service bulletin

 

 

File In Section: 6E - Engine Fuel & Emission

Service Bulletin

I I I Oldsmobile PONTIAC

Bulletin No.: 67-63-03

Date: June, 1996

Condition

Some owners may experience a phantom stall when the engine throttle is closed and high load demands are placed on the engine. Typically this is encountered when the owner is maneuvering in a parking lot at an idle speed with a closed throttle and placing a high load demand on the engine such as power steering. The engine could stall but would restart immediately. This type of stall is very difficult

to duplicate.

Correction

A new fuel injector, part number 25170699, has been released for service to correct this condition. The new fuel injector is designed to flow richer at a low pulse width. Before replacing the injectors, remember to check the following:

1. Minimum air rate setting.

2. Vehicles equipped with manual transmissions:

check crankshaft end play, refer to

bulletin 236007.

X - RPO LQ1)

3. Power steering pressure switch.

4. Make sure the latest calibration is installed in the vehicle, refer to bulletin 336506.

Parts Information

Parts are currently available from GMSPO.

r Part Number

Name I

jector Asm - M/Port fue!]

[ 6 25170699 In

Warranty Information

For vehicles repaired under

warranty, use:

Labor Operation

Labor Time

J5650 Injector, fuel - replace

Use published labor

operation time.

Subject: Phantom Stalls at Closed Throttle and High Engine Loads (Replace Fuel Injectors)

Models: 1991-93 Chevrolet Lumina

1991-93 Oldsmobile Cutlass Supreme

1991-93 Pontiac Grand Prix

with 3.4L Twin DOHC V6 Engine (yIN

Link to comment
Share on other sites

Hey Aaron, I've kinda got the same question, except what I would like to know is can you use the injectors from a 96 3100 in a 3.4? It is extremely hard to find a 95+ 3.4 engine around here (none) of the yards have them. I experience the same stalling issue.

Link to comment
Share on other sites

  • 9 years later...
  • 9 years later...

Wow, this thread is a blast from the past.

Just for reference making a new thread would probably be better. This thread is... nearly 20 years old :Yikes_anim:

Short answer, probably not. Long answer, I don't know, but.

I'd wager the rate is different between the 3.4 and 4.3, and I think most 4.3s had spider injecton or something weird. don't listen to me though 4.3s aren't my cup of tea.

A quick poke around on the internet seems to indicate that most FWD 94-96 3100s are a direct replacement, though double check me on that one.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...