Testing done here is the codes Help

[bubba]

I'm going to start there, I'm going to go back to the basics. I'm going to rerun the codes and see if something doesn't pop up and will report it back, and we can go from there!

 

[bubba]

KOEO

122
327
125
325
452
172

KOER

998
122
122



here's the codes, and how do you get the right voltage to the dpfe?

 

[hawkeye18]

122 TP sensor input is less than Self-Test minimum.
327 PFE sensor circuit voltage below Self-Test minimum.
125 TP sensor input voltage is less than expected.
325 ????? (but it's an EGR code of some sort)
452 Insufficient input from VSS.
172 HEGO sensor circuit indicates lean. (Rear Side).

998 Hard faults present.
122 TP sensor input is less than Self-Test minimum.


Sounds to me like either your EEC fried itself, or the +5v supply line is majorly broken. The 998 rarely shows up unless something inside the EEC is broken...

 

[bubba]

Where, would you start to fix the problems at? I'm no EE or EET!

122 TP sensor input is less than Self-Test minimum.
327 PFE sensor circuit voltage below Self-Test minimum.
125 TP sensor input voltage is less than expected.
325 ????? (but it's an EGR code of some sort)
452 Insufficient input from VSS.
172 HEGO sensor circuit indicates lean. (Rear Side).

998 Hard faults present.
122 TP sensor input is less than Self-Test minimum.


Sounds to me like either your EEC fried itself, or the +5v supply line is majorly broken. The 998 rarely shows up unless something inside the EEC is broken...

 

[hawkeye18]

Find another D4U1 and install.

 

[bubba]

It won't be hard to find them lol, and after I do all of this, I hope to have a strong sho

 

[Huntervf]

Swapping the throttle position sensor is a 30 second job; it's the black plastic box with a plug going into it mounted on the side of the throttle body; held in by two phillips head screws. And it can certainly cause problems similar to what you're describing.

The DPFE sensor (pressure sensor) is the gray rectangular thing mounted on the rear of the intake manifold on the driver side. Should be a wiring harness and a couple hoses attached to it. If that's bad, it can trigger an EGR code and cause operating problems.

There are "nostrils" in the intake manifold running parallel to the car that you can see if you remove the TB, and there is also a larger nostril behind the EGR valve in the intake. Both those areas can become clogged, causing an insufficient EGR flow. If you know the EGR valve is good, those are your two other candidates for continued EGR problems.

What kind of O2 sensors are you using? My ATX used to eat generic O2 sensors constantly until I finally got ****** and switched to Bosch. They're a bit more in the price department, but they seem to work better with the SHO... at least mine.

Of course, if the EEC is bad then all the other codes could be false. I'd track down another computer (even if it's from a 93 ATX), plug it in and see what you get.

 

[hawkeye18]

I've never seen sensor faults cause a 998; that's what makes me think it's a bad EEC.

 

[bubba]

Yeah I looking at all of it, I replaced egr, and dpfe, I was wondering if the senser for the egr could be bad, As that's a part of the egr. I have new Bosch 02's to put in and a fresh y-pipe to add to everything!

Does anybody know where to find a new DPFE on the sites.... I was looking on rockauto and didn't see anything listed. And for the computer where could I find a new or remaned one?

Swapping the throttle position sensor is a 30 second job; it's the black plastic box with a plug going into it mounted on the side of the throttle body; held in by two phillips head screws. And it can certainly cause problems similar to what you're describing.

The DPFE sensor (pressure sensor) is the gray rectangular thing mounted on the rear of the intake manifold on the driver side. Should be a wiring harness and a couple hoses attached to it. If that's bad, it can trigger an EGR code and cause operating problems.

There are "nostrils" in the intake manifold running parallel to the car that you can see if you remove the TB, and there is also a larger nostril behind the EGR valve in the intake. Both those areas can become clogged, causing an insufficient EGR flow. If you know the EGR valve is good, those are your two other candidates for continued EGR problems.

What kind of O2 sensors are you using? My ATX used to eat generic O2 sensors constantly until I finally got ****** and switched to Bosch. They're a bit more in the price department, but they seem to work better with the SHO... at least mine.

Of course, if the EEC is bad then all the other codes could be false. I'd track down another computer (even if it's from a 93 ATX), plug it in and see what you get.

 

[Huntervf]

The computer will likely have to come from a parts SHO, not sure I've ever seen a new D4U1 (and not sure I want to... would be major $$$). Not sure about the DPFE; seems like something that should be available at parts stores.

 

[hawkeye18]

I have a DPFE if you need one.

 

[bubba]

Yeah..... this has always stumped me, and everything I thought was in my head... Thanks for all of the post guys

 

[hawkeye18]

I can also acquire a D4U1 pretty quickly if you need one of those.