Hi everyone. The time has come for me to start my engine swap.
Saturday I will be off to pick up my 3.4 TDC engine, ECM, and
wiring harness. Before I begin I want to make sure I have everything
covered. I am installing on a 1984 2.5 cradle.
1. 3.4 TDC Engine
2. V6 Fuel Pump
3. V6 Air Cleaner Assembly
4. Motor Mounts? - Will it bolt up to cradle or will I need to fab something?
5. ECM
6. Wiring Harness

These are all I have. I think I have everything I need to get this thing
going, besides some misc. hoses and other stuff like that. If anyone
can think of something that I have possibly missed could you please
let me know. I am trying to get this project done in less than a month. Thanks.

I think you need the V6 engine mount bracket. That's the U shaped one that bolts around the pulley end of things. Cannot recall if you need the 88 one or not since I made a custom one. so far as I know you can use the stock mounts. bolts right up to the tranny.

You'll probably need to do something with the throttle cable. Again I made a custom one but you can modify others to work.

Exhaust system is usually the biggest headache. Everyone does it differently. You also need o work out a dog bone mount. some people have used the stock fiero location and connected it to the PS bracket. I made a custom mount that fits to the tranny end of things.

Have fun and keep us posted and don't forget the pics !!.

You can read about my swap (getting on two years now !!) on my web site.

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Dave E

www.ltlfrari.com
Visit the NC Fieros website at TarheelFieros.org

Thanks for replying. I thought I read somewhere it had to be the
V6 mount but I wasnt sure. Dont worry about the pics, Im gonna
take plenty. Looking at your site now. Thanks again for the advice.
+ for you!

Definately keep us posted of your progress as I'm sure I'm not the only one who can't wait to go from a 2.5L to a 3.4L.

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cant wait to see pics

OK, went to the junkyard today and pulled this 3.4 DOHC. It took
us about 3 hours. Not to bad with the minimal amount of tools we
had. It is from a 1995 Lumina. Now, what do people do with the
power steering pump and AC compressor? Theyre just taking up
power that I could be using!

There's a wiring diagram for mine on my web site (page 5 of the swap topic I think). Fiero is 85 and I custom built the harness but it may help you figure out what on the fiero connects to what on the 3.4.

PS. Is your 84 and auto or a manual tranny? If it's a manual that 95 ECM will not work for you. You'll need the 16149396 ECM and a suitably programmed prom chip (Darth Fiero, amongst others can do one).

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Dave E

www.ltlfrari.com
Visit the NC Fieros website at TarheelFieros.org

[This message has been edited by ltlfrari (edited 12-04-2004).]

Hello again everyone. Sorry it has been a while since my last update, however,
I havent had much time to work on the car. So let me give you an update on
what I have accomplished in the past few days.

1. Got the flywheel and clutch bolted to engine.
2. Got the engine bolted to transmission (4 spd).
3. Right now I am holding the engine level with a jack, but the machine
shop said my engine mount should be ready by Tuesday. (I hope!)
4. Dropped the gas tank and waiting for AC DELCO fuel pump to arrive.
Hopefully by tomorrow.

I think thats about it so far. And now, the moment you have all been waiting
for...........................Pictures!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Fuel lines to engine.

quote Originally posted by joshuaz99:

Looks like someone finally DID build a better mouse trap... Something big enough to kill 1,000 at once!

Please chock the front wheels... that would make me feel at least a little better...

Maybe stick a 2x4 in a couple strategic locations...

This guy has the right idea:

[This message has been edited by ryan.hess (edited 01-02-2005).]

That would be for the PCV valve. Other end of valve attaches to a pipe that goes to a fitting up near the throttle body.

Connector is for coolant sensor. There are two, one goes to ECM, one goes to temp gauge. Cannot recall which this one is.
Pipe goes undr plenum and connects to vacuum connector up by the other end of plenum (neear where fiero dogbone would go). This end goes to the tranny. It's called the 'transmission modulator' in the books. I think it stops the tranny shiffting so soon under hard accel (hi vacuum).

If you use the stock 95 ECM you will be able to use the MAF I think although the 95 engines expect an electronic tranny since the ECM (actauly a PCM) also controls the tranny). I have no idea how things work out mating it to a Fiero tranny though.

Second the comment about the way it is jacked up. At least put the wheels under there so that if it does go it won't turn you to mush (keeps the wheels oout of the way too. Don't envy you working in the yard like that though. Best of luck withthe swap.

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Dave E

www.ltlfrari.com
Visit the NC Fieros website at TarheelFieros.org

[This message has been edited by ltlfrari (edited 01-02-2005).]

If it will make you sleep a little easier I did have tires in the background under
the body by the jacks/stands. I had to move them out of the way to get to the
fuel tank straps. Thank you for the concern though. I do not like to work in the
yard but the garage is to small to fit a car into at the moment. Thanks for the
responses LTLFRARI on the parts. I am sure I am going to need some more help
in the near future. My wifes Aunt and Uncle live in Raleigh that we were supposed
to go see on New Years before my wife broke her leg. Hopefully, when Im done
I can come down and we can cruise or something. LOL Thanks again all for the
responses.

If you have questions or need info that ltlfrari doesn't have up on his site you can check out my build thread here on PFF:

https://www.fiero.nl/forum/Forum2/HTML/047231.html

Fieromadman is using the MAF 95 TDC with a Getrag.

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Activities Director N.I.F.E.

www.fierofocus.com