3400 swap question

[jking18]

OK so ive decided to get rid of my 2.8 and swap in a 3400. What should I grab when I go to the junkyard?

[scd88ga]

Engine, trans, wiring, ecm, mounts, cables, hoses, etc.....

[woody90gtz]

Engine, trans, wiring, ecm, mounts, cables, hoses, etc.....

Orrrrrr just the engine. The rest is not needed from the 3400 donor car. However you will need the coolant lines, ps line and throttle cables from a 3100 Beretta/Corsica...and a custom engine mount and custom computer chip made for a 88-91 Beretta 3400.

[scd88ga]

I'm a tard, lol! I didn't mean for him to get all those things from a 3400 vehicle... I apologize for my extremely generic reply, my bad!

I myself have never done a 3400 swap, but have done countless other swaps. I have 2 local friends, both with 3400 swapped 95's, and I have been all over both of them looking at what's what and why!

Isn't there a website/forum with a breakdown of everything needed to do the 3x00 swap for every year/model?

jking18, when you have a parts list compiled of what you need for the swap, let me know asap! I may be able locate and sell you used parts and some I may already have!

[3X00-Modified]

wiring, ecm

Um yeah not necessary... That involves MUCH more of a headache than you need. But can be done... Take Roberts 89 for example, its running off of a Grand Am OBDII setup.

Custom front mount is the one needed, Not sure if the Z24 guy is still making them or not. I can take a picture of the one that Robert has on his 89 if you want it.

[scd88ga]

I suppose we're going to need to know if he wants to go with OBD1, OBD2, or the blah in between for the electronic engine control.....

And also what trans he wants to use, I no idea if he has a auto or manual currently...

Jon, wouldn't at least cutting all the wiring pigtails to go along with the 3400 be beneficial?

I guess the OP needs to be more specific of his intentions and wants/needs for starters.

[3X00-Modified]

No not really, all of the plugs are the same, the only real thing he would need is an injector harness from the donor injectors he using so he has the plugs to splice into his harness... he should be able to get away with a set of 99 3400 injectors which are 19lbs/hr and the same plug as the 2.8's. Other than that the rest matches up fine. He wouldn't be using the Cam sensor so that's not necessary and he wouldn't be using the crank pulley sensor so that's another thing he can unplug and remove/cover and when it comes down to it, whats left...

IAC
TPC
EGR
O2
Temp
Oil Pressure
Crank position
MAP
IAT
ICM

and that's about it... All of which didn't change throughout the years. The locations might have, but you can mess with that.

He may want to extend his harness to re-locate his ICM and coils to the back of the engine like it is on the 3400 instead of under the manifold like on the 2.8.

And yes there is a general website for this, but its for a 3100 equipped car... and its apparently down... lol http://www.3400swap.com

this better suites him since J-bodies came with the MPFI motors.

http://www.v6z24.com/howto/3400/

This guide isn't complete, but it gets you the info needed about wiring changes and parts needed.

[scd88ga]

the only real thing he would need is an injector harness from the donor injectors he using so he has the plugs to splice into his harness... he should be able to get away with a set of 99 3400 injectors which are 19lbs/hr and the same plug as the 2.8's

^^^I have one of these on my shelf from a good running, low mile good running 99 GA with the harness, fuel rail, and injectors in one piece ready to go! Actually it's the only 60 degree V6 parts I have at all right now I think, (wait, I have a 3500 top end somewhere too!) lol

Jon, thanks for the info and links! I'm going to read up a bunch of the 3X00 swaps so I know what's what for what year, and can better assist people with questions and finding parts for swaps!

The only 60 degree V6 I've owned was my 88 Corsica years ago, I'll have to dig out a pic and post it up sometime and write a little story about it! I look forward to cramming my brain with as much new info as possible about the 60 v6's though! Sorry for my slightly off-topic rambling, I'm just in a really good mood!

[ronaconda]

He will need a fabricated front mount as woody said. And if it is an auto a modified trans dipstick tube.

[ErichZ26]

I did one of these years ago.

Not to overlook...
Fuel line parts....i used older 94 Grand Prix pieces.
Throttle body linkage including kick down if automatic.
coolant lines that fit in engine bay...like 94-98 L/N body
EGR valve differences.

MPFI swaps are a bit different than 3100 to 3400.

Take your time when you do it. The first one i did took me 2 weeks and tracking down parts. I can do these swaps in a work day now.

scd88ga....i would recommend experience...do a swap. I have seen a lot of rigged cars out there. Not to mention doing things i would have done different later.

[jking18]

wiring, ecm

Um yeah not necessary... That involves MUCH more of a headache than you need. But can be done... Take Roberts 89 for example, its running off of a Grand Am OBDII setup.

Custom front mount is the one needed, Not sure if the Z24 guy is still making them or not. I can take a picture of the one that Robert has on his 89 if you want it.

A picture would be great. I have a diagram for a manual transmission but I wanted to use the 4t60. What is the difference between a manual mount and an automatic mount?
edit: The mount is for a J body. Should it work on a beretta without modification or will I have to modify?

[jking18]

I suppose we're going to need to know if he wants to go with OBD1, OBD2, or the blah in between for the electronic engine control.....

And also what trans he wants to use, I no idea if he has a auto or manual currently...

Jon, wouldn't at least cutting all the wiring pigtails to go along with the 3400 be beneficial?

I guess the OP needs to be more specific of his intentions and wants/needs for starters.

I am going to stick with OBDI and I want to go through WOT-Tech.com for the chip.

[3X00-Modified]

Remember you need to find a 4t60 and NOT get a 4t60e, the E version wont run on OBDI. Also the later 3t40 mounts may work with a 4t60 but I'm not positive on that one... I know the early versions were the same as the 5-speeds with the big top mount that was right on the frame rail. Later years put the mount down below the rail and bolted to the side case of the trans.

[woody90gtz]

Isaac found a way to run a 4T60E on OBD1, but I have no idea where he has been to explain it.

[3X00-Modified]

Its the same Idea I had... It's using an A-body ECU... I gave up on the idea when I had so many problems with ground circuits... it was easier for me to do the engine bay harness and swap to OBDII...

So for him to use that setup he would have to completely re-wire the car to function as an A-body, It will not run on his current OBDI setup.

I also do not think his car ever actually "ran" like that other than maybe a few test starts.