Quote:
Originally Posted by zafarhayatkhan
Seems like these codes comes up often for this model. I ended up replacing the engine control module, the last step, after various other checks.
Pin 8 code will come back long before the check engine light illuminates. You can reset the adaptation by clearing pin 8 again after you have cleared all the codes and get 1 led flash.
|
Exactly.
Clearing codes and resetting memory mean with the code retrieve tool are two completely different procedures . I did not want to get back into this thread when it got hi-jacked , but , as Z states .. get the ECU back to Mean and then go back to pin 8 [ and 14 , as as CTP sw can be faulty]for code fault storage . The CE is simply getting the end accumulation of faults detected by the HFM/SFI and AE/CC modules because they have finally reached the point of affecting Emmisions Mandated Faults [ That is what the N/59 module does and that is why I had you go to pin 8 to see which engine management faults were finally causing the Emmissions Module [N59] to activate CE lamp. As you can see , the problem you have is directly picked up at pin 8 module and is a A/F mix that is out of ECU lambda limitations to correct.
Cutting and Pasting code charts to remedy your problem do nothing to help rectify or interpret your a/f problem. And simply clearing a CE lamp does Absolutely nothing to address the problem, except turn off a light..
There are several simple checks to be made from that modules info , which
are from a bad fuel pressure regulator and vac leak , all the way through the system to the the ECU [ as in Zaf's case .. I remember that one]
Get the memory reset on 8/14 and then check for vac leaks and fuel pressure diaphragm leak at intake line/fuel rail. Look for any eveidence of raw gas at the vac line port of regulator, as this is a common fault, as is the white plastic vac. line crossing the front of the engine going to the Switch-over-valves . They break from heat fatigue and crack on all 104s. The recommendation here is to eliminate the plastic and go with full length rubber hose to SOVs..
There are other simple checks , but these would be first possibilities on my list due to high frequency fail rates and checking simplicity..