2000 Chevy Impala My Impala starts then stall right away.

Tiny
HUGOX25
  • MEMBER
  • 2000 CHEVROLET IMPALA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 128,600 MILES
I think I have a big problem with my car, my car ran fine smooth and then the AC went out, so I refilled with the r-134a since I needed to take the car to the emissions test, I also filled the gas tank and added a fuel injector cleaner. For some reason the computer at the emissions test facility could not read my car computer, and I was told to go back in a week. The next day I turned my car and on my way to the store it just died, I then would turn it back on and with in 2-3 seconds it would just died. I managed to get my car to my uncles (old school mechanic) by turning the car on and putting pressure on the gas pedal if the RPM was below 800 the car would just shut off. The codes are P1122, P0122, P0140 & P0141. We changed the crank relay sensor, the TP sensor the gas pressure it's in between 40-50. At this time I have no idea on what's wrong with it. Any help would be greatly appreciated.
If I get a possible solution I'll post once it's solved and will make a donation to this site.

Thanks.
Do you
have the same problem?
Yes
No
Wednesday, August 20th, 2008 AT 9:19 AM

8 Replies

Tiny
RASMATAZ
  • MEMBER
Lets try the idle air control valve

Disconnect the air intake ductwork from the throttle body.

Start the engine, then increase and hold the idle speed to 1,000 to 1,500 rpm.

Spray the throttle cleaner or engine cleaner into the throat of the throttle body, aiming for the idle air bypass port (usually located on the side or top of the throttle body opening). Give this area a good dose of cleaner (about 10 second's worth).

Turn the engine off to allow the cleaner to soak into the IAC passageway.

Wait about three minutes.

Restart the engine, rev and hold at 1,000 to 1,500 rpm, and repeat the cleaning process again.

Turn the engine off again, and reattach the air intake ductwork to the throttle body.

Start the engine and rev and hold to 1,500 to 2,000 rpm until no white smoke is coming out of the exhaust pipe.

If this fails to make any difference, you can remove the IAC valve from the throttle body and spray cleaner directly on the tip of the valve and/or into the ports in the throttle body. Let the cleaner soak awhile, repeat as needed, then reinstall the IAC valve, start the engine and run it at 1,500 to 2,000 rpm as before until no white smoke is seen in the exahust.

If the idle speed still surges after this, the IAC valve is defective and needs to be replaced.
Was this
answer
helpful?
Yes
No
Wednesday, August 20th, 2008 AT 10:49 AM
Tiny
HUGOX25
  • MEMBER
Thank you very much for the feedback, in the en it ended being the mass air flow sensor that needed to be replaced. The car now starts fine and rides smooth, but after clearing the codes and 1-2 days after the check engine light come on, and the code P0141 comes out on the scanner, I had a new 02 sensor on hand (brand new) and replaced thinking this would solve the problem but it didn't. The check engine comes on and the same code P0141, what's next or what other sign I should look for?

Thanks!
Was this
answer
helpful?
Yes
No
Tuesday, August 26th, 2008 AT 9:05 AM
Tiny
RASMATAZ
  • MEMBER
A code P0141 may mean that one or more of the following has happened:

open or short to ground in the wiring harness
O2 heater circuit wiring high resistance
O2 heater element resistance is high
Internal short or open in the heater element

Possible Solutions Replace oxygen sensor (cannot repair open or short that occurs internally to sensor)
Repair short or open or high resistance in wiring harness or harness connectors
Was this
answer
helpful?
Yes
No
Tuesday, August 26th, 2008 AT 9:55 AM
Tiny
HUGOX25
  • MEMBER
Since I replaced the O2 sensor with a new one on sunday, Should I just check the wires to make sure they are ok? The O2 that I put in was a OEM right out of the box, how about the fuse/relay?

Thanks for the quick reply.
Was this
answer
helpful?
Yes
No
Tuesday, August 26th, 2008 AT 11:30 AM
Tiny
RASMATAZ
  • MEMBER
Check and test the wires and connection
Was this
answer
helpful?
Yes
No
Tuesday, August 26th, 2008 AT 12:05 PM
Tiny
HUGOX25
  • MEMBER
Yesterday we replaced the O2 Sensor again and cleared the codes, check the wires and there is voltage, I ran the car for about 30 min on the highway with the scan tool attached to it, it ran fine the only thing I noticed was that the O2 heater check (I think), and the EGR thing were incomplete, my guess was to run it more so that the computer would reset completely. This morning I decided to ride to work with the scan tool attached everything seems fine except for the O2 heater thing and the EGR, once parked I decided to scan the vehicle once more and it gave me these two codes P0140 and P0141. P0140 I noticed it said intermittent and the P0141 was pending. I'm really going WTF? I know it's hard to detect the problem directly, but what should I do next? Is the O2 sensor atfer the cat bad or can the cat be bad?
Was this
answer
helpful?
Yes
No
Wednesday, August 27th, 2008 AT 11:20 AM
Tiny
RENAUDTN
  • MEMBER
You may have a bad catalytic converter, especially if you never replaced it.
Check for backpressure.
You can also check the difference in temperature between the converter inlet and outlet.
Was this
answer
helpful?
Yes
No
Wednesday, August 27th, 2008 AT 2:13 PM
Tiny
RHALL77
  • MEMBER
"P0140 I noticed it said intermittent and the P0141 was pending. I'm really going WTF? I know it's hard to detect the problem directly, but what should I do next? Is the O2 sensor atfer the cat bad or can the cat be bad?"

What o2 sensor are you replacing. Both these codes are related to the rear o2 sensor "post cat converter".

Replace the o2 sensor after the cat converter
Was this
answer
helpful?
Yes
No
Wednesday, August 27th, 2008 AT 7:00 PM

Please login or register to post a reply.

Recommended Guides