NO POWER

Well once you get this problem fixed, your gonna have a good running vehicle. This sounds like the catalytic converter is plugged up. You can have it checked out at an exhaust shop, or make the vehicle have this problem and stop somewhere darker and look at the cat. It would be glowing orange if it is plugged up.

I have a 2005 Aztek and it had started this same issue. Did you figure out the fix?

no advance either in timing mine is doing same!!!

I got a 2001 and mine also just started doing this. Starts out fine. Get on the interstate get up to 70mph then the first hill it loses all power to the pedal and slows down to around 55-60mph and the check engine light starts flashing. It don't do it all the time though?

IF you have a Aztec or Rendevzous,might be montana and ventures may apply too. If you have a no accelleration issue ,wont rev past say 3500rpm then falls on its face,scanner shows all timing being pulled out.Mine had the ABS light on and AWD disable light on.Fixed it by repairing 2 broked wire at the ABS sensor 6" from the sensor in the harness.I posted my issue online paid the $20 mentioned all the issues ,no "super tech" could ever offer any help.Got my money back.

this seems to be a computer issue????

seriously no other explanations?

Seems like your Oxygen Sensor is performing poorly. Not always will this show a code. But I’ve had the same issue. Feels like it just goes limp. I know. O2 sensor problem. I see you’ve said you replaced it. I replaced mine as well. Recommend replacing them upgrading fuel. Don’t use standard gas try the 90’s and ease the sensor. Don’t go full on joy riding once complete. Drive lightly like a grandma for a few days and gradually get more into it.

I have a 04 Aztek awd it ran fine for a quick trip this morning then I lost my insterment panel then is stalls and won't restart. Wait an hr is will start up run for 2min then it does it all over again. I've checked fuses and relay's, ran the starter and alternator wires, cleaned up battery connections. Any ideas?

I have a 2003 pontiac astek its a automatic transmission and it was rebuilt like new a year ago.and one day it just wouldent shift into 3rd gear .i checked the fluid it was completley dry i put 2 quarts of fluid in it and it still wasent shifting It drives good just wont shift.and ive left it parked and im wondering if mabey i dident put enought fluid And o see no leak anywere.this just happen all at once when it was being drove down the road it did this not shifting into 3rd can u please tell me what can be wrong will it help if i put more fluid in it.

I have a 2003 pontiac astek its a automatic transmission and it was rebuilt like new a year ago.and one day it just wouldent shift into 3rd gear .i checked the fluid it was completley dry i put 2 quarts of fluid in it and it still wasent shifting It drives good just wont shift.and ive left it parked and im wondering if mabey i dident put enought fluid And o see no leak anywere.this just happen all at once when it was being drove down the road it did this not shifting into 3rd can u please tell me what can be wrong will it help if i put more fluid in it.

I have a 2001 Pontiac Aztec when I turn the key I have no Electric I opened the hood and shook the battery my power came back up what would be my problem

Ground wire to frame clean or replace it mine was No start I had all lights and power I'm check the EgR wires right now always check first before getting a new egr and my converter was stopped up

I have 2003 Aztek with same problems twice check starter wires make sure they are not corrouted check battery is charged and not corrouted but mostly it probably the alternator.

ABS issue with mine caused that.It’s designed to limit the throttle if the computer senses a brake or abs problem. Ended up I had run over a small branch and the abs sensor wires got ripped out of the wheel bearing.Replaced the bearing and sensor and power went back to normal.