[steve]

Hi!
Got a weird problem. Just changed the fuel pump assembly and fuel filter in my 99 Astro, 1 day later I've got a P1404 code (EGR not closing). Could I have done something when I changed the fuel pump? or is something totally unrelated and just a freak coincidence? I see alot of posts about carbon in the EGR valves, does this apply to the 99's as well?
Thanks in advance
steve

 

[astro355]

What was the reason for changing the pump? Was the pump dead or was fuel pressure not right or something else?

 

[steve]

The pump was dead..

 

[astro355]

I would clean the EGR valve out. Assuming that the fuel pump was faulty and your fuel pressure wasn't what it should have been, now the change in the air/fuel ratio could change the readings.

 

[steve]

Hi all

Still having problems with this one... Cleaned the valve, didn't seem to help, replaced the valve, still have the problem.

Scanner gives me the following information:

P1404GM
EGR Valve stuck open or circuit performance.

Fuel sys 1 = CL
fuel sys 2 = CL
Calc load % = 3.14
ECT(*C) = 89
STFT B1% = 0.78
LTFT B1% = 1.56
STFT B2% = 2.34
LTFT B2% = 1.56
MAP(kPa) = 40.00
ENG RPM = 845
Veh speed (km/h) = 44
MAF(g/s) = 5.00
TPS(%) = 0

someone gave me the scantool but he didn't have the software or book so I have no idea what some of the above means, if anything.