Open loop runs good, closed loop runs bad?

[bojaz01]

check plugs? mine was missfiring like crazy, when i replaced plugs and wires, the plugs were all gapped btwn .65 and .75......way off what they are supposed to be.....runs like a ***** ape now

 

[Exia]

check plugs? mine was missfiring like crazy, when i replaced plugs and wires, the plugs were all gapped btwn .65 and .75......way off what they are supposed to be.....runs like a ***** ape now

He has plugs and cops..
please try and read the full thread.

Now for the issue, if you can find a use ECU I would try that should beable to pick one up @ a junk yard switch them out see what happens, if the same, than just return. There is no harm in trying

 

[tsgrpr97]

Toms89


Lemme throw this out there...What do you think about too much egr flow? The line going to the sensor with the fixed orifice that measures backpressure/flow (sorry I don't know offhand what its called). If that line is blocked, the pcm will be recieving erroneous data, and the actual egr flow could be much higher than its reporting. The extra egr will be real hard to ignite, but might not necessarily set any codes for mixture.

 

[Exia]

Toms89


Lemme throw this out there...What do you think about too much egr flow? The line going to the sensor with the fixed orifice that measures backpressure/flow (sorry I don't know offhand what its called). If that line is blocked, the pcm will be recieving erroneous data, and the actual egr flow could be much higher than its reporting. The extra egr will be real hard to ignite, but might not necessarily set any codes for mixture.

DPFE Sensor ( Differential Pressure Feedback )

 

[JUST4FUN]

i do know that a temp sensor thinks its over heating it will go into limp in mode cuting fuel by the pcm . you say rust by the pcm i would check the grounds

 

[Expy_97]

Found it...

Looks like one of the new injectors I just installed had a malformed O-ring. I replaced it last night and it seemed to fix the power problem. I can't really explain why it would work for a few minutes, but that seems to have resolved it so far. I reset the PCM after fixing the O-ring, so there is a possibility that it could still relearn to run bad again. I'll give it a week or so and then let you guys know.

Thanks for all the help!

 

[Expy_97]

Continues to run bad

So it took longer this time for the reset to wear off. It is again missing, and running with little power. It seems like the o-rings provided with the injectors were incorrect as they all installed with very little effort. I ordered a full set of o-rings and plan to replace them tonight. We will see what happens after that.