I did the 3.4 swap about a year ago and have never got the engine running just right.1995 camaro 57,000 miles on the engine.Was wondering If anyone has had the same symptoms as I have.The car runs rich and loses power at about 3500 rpms.I really need some advice am about to set It on fire.You cam e-mail me
urgester@aol.com or just Pm me.
Thnx

1986 se 3.4 not running right
1986 gt stock second owner

how about a bit more information on your motor:

1) what kind of injectors are you using and what is their flow rate?
2) what fuel pressure?
3) have you modified the chip any?

any other info could be helpful
Dave

I am running 42 psi fuel pressure,2.8 injectors and no mods on the chip.But have another question Is there a difference between the 2.8 timing gears set and the 3.4?

quote Originally posted by urge: Is there a difference between the 2.8 timing gears set and the 3.4?

nope

now, when you do the swap, you know that you have to make a new 0° timing mark on the harmonic balancer since it will be different with the 3.4

If your car is running rich and conking out at about 3500rpm, it sounds like a timing issue

[This message has been edited by ditch (edited 01-06-2005).]

quote Originally posted by urge: I am running 42 psi fuel pressure,2.8 injectors and no mods on the chip.But have another question Is there a difference between the 2.8 timing gears set and the 3.4?

Use the 3.4 injectors.

The timing is the same for the 3.4L as it is for the 2.8L. (10* BTDC)
You should be using the 3.4L injectors.
It is beneficial to have the prom reprogrammed for the engine.
You could also have a fault in the system like a bad catalytic converter, bad O2 sensor, dirty injectors, weak spark/ignition, Vacuum leak, etc.
When you did the swap, Did you replace any sensors? How did the 2.8L run before you swapped in teh 3.4L?

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Happiness isn't around the corner...
Happiness IS the corner.
ZZ4 Powered !!

you have to use the 3.4 injectors or raise the fuel pressure. Also try the ignition module, in the distributor, Autozone will test it for free. Leaking spark plug wires can cause problems like that. Look at them at night while the car is running, look for sparks. I have had wires that only leak under load. Your problem sounds like the injectors though.

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'84 Fiero Sport Quad 4 coming soon
'87Blue GT 3.4L Swap Completed!!!!!!!!
http://www.lasvegasfieroclub.com/

Hey guys, he says he's running rich so I don't think the stock 2.8 injectors are the problem. I do agree though, he should be running the 17# injectors.

Urge, Oreif hit it right on the head with the 3.4 swap. If you do it you should consider replacing all of the old sensors. They're probably about 20 years old by now. Also, like he said, you should have the EPROM reprogrammed for your new engine. That could be your problem.

One thing, how do you know it's running rich?

Dave

Ditto on the injectors. Unless you turn your fuel pressure way, way up the 2.8 injectors just won't flow enough, and I'm not even sure the regulator will work properly with the pressure up that high anyway.

JazzMan

When I did my 3.4 pushrod swap in Oct. '03 I had problems with it. It wouldn't rev very good, would cut out and surge. The problem was the MAP sensor, I had a bad electrical connection at the MAP. Fixed the connection and it worked perfect. May not be what is wrong with your car, but worth a look.

Thnx for the info I will replace sensors again as I have done this already but about a year ago.Did not know about reprogramming the eprom If orief could tell me where to get It done It would be greatly appreciated.

Also Ditch I am getting black sooty smoke coming from the exhaust and a very very strong smell of raw gas also .

also thnx eatonside I have not checked the connection at the map

[This message has been edited by urge (edited 01-07-2005).]

quote Originally posted by urge: If orief could tell me where to get It done It would be greatly appreciated.

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