3.4 swap runs but sputters smooths out then dies smells very rich

[Sandman87]

Just took her for a drive! it is shifting good and staying running for sure doesn't feel like it's got the amount of power it should it's running a bit rough. seems like one of the cylinders might not be firing right hopefully this isn't that compression issues that I mentioned before. Just seems to be a little rough.

[Sandman87]

So I just took it out for another spin it is sthrowing trouble codes 32 and 34.this relates to the EGR and map sensor if I am correct what should I check into. EGR valve is a brand new map sensor is also brand new.

[GTRS Fiero]

It still seems to me that the suspension shouldn't drop enough to allow this.

Glad things are finally getting sorted.

[Fierofool]

Sandman, I just had a trouble code 33 and 34.  Replaced the O-2 and the MAP.  Then I got a rich burn code.  I don't remember what part that indicated, but the only thing I could think of that would cause a rich burn was the Coolant Temperature Sensor.  Replaced it and the new code went away.  Mileage has jumped from 18 to 22. 

The left half-shaft is so short that when the suspension is fully unloaded, there is a sharp angle at the tri-pot end at the transmission.  The tri-pot can bind and suffer damage.  The right side isn't so prone because the longer length creates less angle. 

[GTRS Fiero]

I was just thinking that this is a design flaw.

[Sandman87]

im going to warranty replace the m.a.p tomorrow and ill grab a new o2 sensor .the coolant temp sensor is new so idk haha. i have not replaced the o2 sensor so i guess i will .after i get the new parts on ill report back..

the axel looks fine visually hope i didn't fatigue it !

right now it drives but i wouldn't take it far with how little power and rough its running .

after i read the codes and restarted it to put in the garage the codes were cleared. so idk

[Sandman87]

p.s im going to try and get a driving video tomorrow and post it to youtube so yall can hear it .

[GTRS Fiero]

As fas as the CTS, new does not mean good.

[Fierofool]

Correct.  Especially if it's a BWD brand.  Others should be suspect, too if made outside the northern hemisphere but still be wary of those.  I bought an AC Delco oil pressure sensor that was in a BWD box inside an AC Delco box.

[Sandman87]

Just dropped the car off its getting an alignment done. Put a new map sensor in it still runs the same put new plug wires on it still runs the same retested my compression hot they are all within 119 and 125

[GTRS Fiero]

Is there vacuum at the FPR?

[Fierofool]

There would have to be a vacuum at the pressure regulator.  If the MAP sensor goes bad, the ECM can't accurately calculate engine load, which means the air-fuel ratio will become either too rich (more fuel) or too lean (less fuel). ... This leads to excessive fuel consumption, poor fuel economy, and possibly detonation.

If the sensor is disconnected, the fuel load will be excessive.  Makes me wonder what was going on when the engine just quit when you unplugged the harness.  I could see it choking down from flooding, but not just stopping as if the ignition was turned off. 

[GTRS Fiero]

The fuel pressure is too high while running, which makes me suspect that's why the engine is running rich.  Usually, high fuel pressure is caused by fuel pump or FPR issues.  The most likely issue with the fuel pump is vacuum.

No idea why the engine wouldn't run with the MAP sensor unplugged.

[GTRS Fiero]

It almost makes me question the ECU.  Sortof like Donsterxs up/down idle issue, although that was on an L4.

[Fierofool]

A bad MAP sensor will cause an erratic idle.  Do a google search for map sensor purpose.  That's where I found the information above.  Lots of other good information comes up, too.  What happens when it's bad, what happens if it's unplugged, etc.