01-05-2016, 01:45 PM
Its a 97, 4dr, auto.
So I may have misspoke when I said 400-1200rpms erratic idle. Looks like it's more around 400-900 as you can see in this video I took.
https://www.youtube.com/watch?v=Aim1VTu8...e=youtu.be
At about :33 I rev it up and then try and hold it about 1200rpm (with the pedal). You can see that even above idle, it randomly dips and stutters.
I've unplugged the ICV and it instantly stalls.
Unplugged the o2 sensor and it didn't make any difference.
I checked for air leaks on the intake tube, adjusted and re-tightened the hose clamps just to be sure. I used propane to see if I could get it to rev up with no change.
I inspected the vacuum lines and didn't see anything out of the ordinary. Wiggled them around to see if there were partial leaks. No change.
The engine does shake hard when it misfires.
Here is a video of the engine bay. It doesn't show up that bad in the video but the motor shudders even when it rev it up to about 2500.
https://www.youtube.com/watch?v=SgYgrPP6S0I
I haven't checked the Fuel Pressure. Is there a way to do that (shraeder valve somewhere?)
The 121 code showed up with it idling in my driveway. It returned a second time today while letting it idle.
My ScanXL program decided to quit working today. No idea why, but I'm looking at purcahsing some new software to diagnose/datalog. Any suggestions?
So I may have misspoke when I said 400-1200rpms erratic idle. Looks like it's more around 400-900 as you can see in this video I took.
https://www.youtube.com/watch?v=Aim1VTu8...e=youtu.be
At about :33 I rev it up and then try and hold it about 1200rpm (with the pedal). You can see that even above idle, it randomly dips and stutters.
I've unplugged the ICV and it instantly stalls.
Unplugged the o2 sensor and it didn't make any difference.
I checked for air leaks on the intake tube, adjusted and re-tightened the hose clamps just to be sure. I used propane to see if I could get it to rev up with no change.
I inspected the vacuum lines and didn't see anything out of the ordinary. Wiggled them around to see if there were partial leaks. No change.
The engine does shake hard when it misfires.
Here is a video of the engine bay. It doesn't show up that bad in the video but the motor shudders even when it rev it up to about 2500.
https://www.youtube.com/watch?v=SgYgrPP6S0I
I haven't checked the Fuel Pressure. Is there a way to do that (shraeder valve somewhere?)
The 121 code showed up with it idling in my driveway. It returned a second time today while letting it idle.
My ScanXL program decided to quit working today. No idea why, but I'm looking at purcahsing some new software to diagnose/datalog. Any suggestions?