Vehicle make/model = Olds Aurora
Year = 2001
Mileage = 131000
Engine size = 3.5 V6
dash lights = Check engine
codes = p0410 (air pump)
work done to repair = Had 2 new ones put in and the 3rd went again and
so I'm not replacing.
tip/donation yes
tech = JK, MW, KK, SF
question = I'll be driving 40-70 MPH's and my car will hesitate (like
it slides out of gear for a half a second) and then about half the time
when that happens the tachometer will fly up to over 8000 but the
engine will run fine...thoughts?
JK and SF:
Thank you for your tip/donation.
The A.I.R. code you are getting may not be another pump failure, but the other concern seems
more important-and not related.
When you say it slips out of gear, and the tach goes way up, does the engine actually sound like
it goes that high, or is the tach just showing that?
I will wait for your response and have some help in the morning.
VISITOR:
No, the engine does not go that high, the tach just shows that...infact sometimes the tach will just
fly up over 8000 without that slight hesitation in the engine.
JK and SF:
OK. I spoke with SF our trans. tech. He says there are several internal components in the trans.
that can cause it to slip out of gear for a second, but this does not seem to be the case. This
sounds as if the engine just sort of "burps" for s split second. any number of things can cause
this. A loose wiring harness or connector, a module going out, loose/corroded battery cables.
The re-ocurring AIR code and replacement of the pump is interesting. There are a few important
ground wires on the lower trans. bell housing in the area of the pump. It is possible that there is a
poor connection at one of them. One of them is a ground for the ignition control module. This
could possibly explain the jump in the tach. Have those grounds inspected very carefully, as well
as all grounds. Pulling on them slightly may show broken wire inside the insulation by the
insulation stretching. Or, wire may pull out of the eyelit.
As engine is running, pulling and moving harnesses may show the location of a poor connection
by causing the engine to stumble. That would give a good idea to the general area of a
harness/connector problem. I will send a diagram of the grounds on the trans. bell housing in
another e-mail.
The AIR code returnig could be the ground or connector for that pump is burned, or one of the
air diverter valves on the exhaust is bad. There is a good pic of those in one of our webpages, in
the "how-to, tips, pics..." section.
Back
Year = 2001
Mileage = 131000
Engine size = 3.5 V6
dash lights = Check engine
codes = p0410 (air pump)
work done to repair = Had 2 new ones put in and the 3rd went again and
so I'm not replacing.
tip/donation yes
tech = JK, MW, KK, SF
question = I'll be driving 40-70 MPH's and my car will hesitate (like
it slides out of gear for a half a second) and then about half the time
when that happens the tachometer will fly up to over 8000 but the
engine will run fine...thoughts?
JK and SF:
Thank you for your tip/donation.
The A.I.R. code you are getting may not be another pump failure, but the other concern seems
more important-and not related.
When you say it slips out of gear, and the tach goes way up, does the engine actually sound like
it goes that high, or is the tach just showing that?
I will wait for your response and have some help in the morning.
VISITOR:
No, the engine does not go that high, the tach just shows that...infact sometimes the tach will just
fly up over 8000 without that slight hesitation in the engine.
JK and SF:
OK. I spoke with SF our trans. tech. He says there are several internal components in the trans.
that can cause it to slip out of gear for a second, but this does not seem to be the case. This
sounds as if the engine just sort of "burps" for s split second. any number of things can cause
this. A loose wiring harness or connector, a module going out, loose/corroded battery cables.
The re-ocurring AIR code and replacement of the pump is interesting. There are a few important
ground wires on the lower trans. bell housing in the area of the pump. It is possible that there is a
poor connection at one of them. One of them is a ground for the ignition control module. This
could possibly explain the jump in the tach. Have those grounds inspected very carefully, as well
as all grounds. Pulling on them slightly may show broken wire inside the insulation by the
insulation stretching. Or, wire may pull out of the eyelit.
As engine is running, pulling and moving harnesses may show the location of a poor connection
by causing the engine to stumble. That would give a good idea to the general area of a
harness/connector problem. I will send a diagram of the grounds on the trans. bell housing in
another e-mail.
The AIR code returnig could be the ground or connector for that pump is burned, or one of the
air diverter valves on the exhaust is bad. There is a good pic of those in one of our webpages, in
the "how-to, tips, pics..." section.
Back
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