Ok, I thought it was a fuel pressure issue....
 

However i have checked the pressure as well as replacing the ECTS, the engine temp gauge is more active now, but it still popped the code, any suggestions from there...So far i have checked Fuel pressure and vac leaks and replaced MAP sensor, ECTS, and AIS.....

any suggestions are welcome, i am running out of ideas unless it is the ECM...and thats gonna be something i cant test, rather frustrating.

ummmm, is this a continuation of another thread? Cause I have no idea as to the background of the issue from what you just posted.....would like to help, but need the background info........

Found it Derf -- scan for "Low Fuel Pressure" ...

ah goose chase threads....

anyway,

1) what is the actual Pxxx Code for the lean fuel mix you're getting?

does anyone know if you need to flash the 97 PCM to think it's a 99 PCM since the top end of the 99 DOHC's were redesigned? I'm thinking maybe some fuel injector timing differences? Maybe? Anyone?

Also -- same question for the DIS module ( pretty sure the coils are the same)

P0171 is the code i am getting. and i went from a 97 DOHC to a 99 SOHC.

It tends to idle rough, but then once it comes up to speed the engine smooths out and runs very well, but i'm not sure what thats indicative of.

Was it a complete swap to a 99 (intake, TB, fuel rail and all)?

Asking because the 97 DOHC has a pressure regulator in the fuel rail, whereas I believe the 99 and up have it as part of the fuel filter.

If it is a full 99 setup, try an oem Saturn fuel filter.
Apparently aftermarket ones are known to cause issues.....

Also -- change your PCV valve lately?
While you're there, check the vac line going from the PCV to the throttle body for leaks...

I did have a bad vac line in the PCV - to the throttle body...

I can change the PCV while i'm waiting to hear back about the throttle body and fuel rail to find out if that was changed too. It would seem like a lack of a pressure reg would tend to cause it to run rich, but at this point, anything is worth a go.

I found out that all they did was an R&R on the motor, so I am using the original throttle body, and fuel rail.

use Saturn OEM PCV -- aftermarkets pass way too much oil
So...... They pulled the entire 97 and put in a complete 99? If so, I'd also go for an OEM saturn fuel filter for the 99 setup

Even with the 97 fuel rail and pressure reg already in the 97? Will do, and i'm gonna see if i can get my hands on a PCV valve from saturn, all i can find are after markets in the shops around here.

OK -- totally confused now - is the engine a rebuilt 97 or a rebuilt 99? This thread started with it being a 99 engine in a 97 -- are you now saying it's a simply a 97 rebuilt?

If it is a 97 rebuild, then no, scratch the 99 fuel filter -- I stated that was for the 99 setup if it was indeed a 99.....(Sigh)

pls confirm if this is a rebuilt 97 or a rebuilt 99 DOHC

its neither, its a 1997 chassis, fuel rail, air intake manifold and EGR, with a 1999 SOHC that was picked out of a car that was scrapped (not rebuilt).....

Long story short, my 97 sl2 engine blew, so we cherry picked a 99 sl1 with 10000 miles on it and installed it.

oiy geeeeeez.......you never mentioned the SOHC part in the original thread, so I assumed it was a 99 DOHC.....

You finally mentioned it (SOHC) only a few posts ago in THIS thread....I'll admit I missed it.....but c'mon.....you mentioned nothing when i mentioned fuel injectors (of which you have NONE?)

______

Did you swap the PCM or at a minimum flash it to become a 99 SOHC?
Cause if not, I have no idea how a PCM from a 2nd gen DOHC would know how to correctly control a 3rd gen SOHC....yes the sensor inputs are pretty much the same, but how is it calc'ing what to do with the air fuel mix for your TBI when it thinks there are 4 fuel injectors?

Hmmmmmm

That i'm not sure about, a family member did the work on the car and i'm trying to resolve this one last issue...I can get in touch with him as soon as he gets back from out west....

What is the procedure for flashing the PCM?

also the PCM's for the 1997 and 99 saturn are listed as the same part number, what would the differance be?

Flashing PCM = dealer visit

the difference would be in the programming -- SOHC vs DOHC I would THINK would be different....don't know but then again I don't claim to be a PCM specialist

Call a saturn dealer and ask the service guys

Will do, they closed the one near me, so i'll be curious what they say. The one that was near me insisted there was no way it could run, i hope these guys are a little more into tinkering.