Rough idle and sputtering exhaust noise
#1
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Just completed my engine rebuild for my early NA. Things went pretty smoothly, except for a few of my own screw ups. Trying to finish it out and am having trouble with a rough idle. It almost seems like it is running on 3 cylinders. I checked all the injectors and the spark plugs and everything looks fine. Compression looks consistent across all 4 cylinders. I have replaced the vacuum lines with no change.
The engine actually sounds really good from the front. The exhaust is what sputters. The car shakes a bit at idle. I was also thinking the balance belt might not be on properly after I removed the pullies. I might try to remove the balance belt for a trial.
The catalytic converter appears to be clogged. There is air be pushed out of a hole on the side of the cat. You can see the hole at the end of the second video.
Check out the two videos. Any suggestions would be appreciated.
http://www.youtube.com/watch?v=PhaSP9XMlws
http://www.youtube.com/watch?v=EPQ6goJO0aQ
Thanks
The engine actually sounds really good from the front. The exhaust is what sputters. The car shakes a bit at idle. I was also thinking the balance belt might not be on properly after I removed the pullies. I might try to remove the balance belt for a trial.
The catalytic converter appears to be clogged. There is air be pushed out of a hole on the side of the cat. You can see the hole at the end of the second video.
Check out the two videos. Any suggestions would be appreciated.
http://www.youtube.com/watch?v=PhaSP9XMlws
http://www.youtube.com/watch?v=EPQ6goJO0aQ
Thanks
#2
Rennlist Member
Thread Starter
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Wow! The idle stabilizer does a whole bunch of work. That was the problem. I cleaned it out with PB Blaster and it was working great. Back to a good idle.
Now for a few suspension upgrades.
Now for a few suspension upgrades.
#4
1st Gear
Join Date: Jan 2018
Location: Brookings, Oregon
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![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Just completed my engine rebuild for my early NA. Things went pretty smoothly, except for a few of my own screw ups. Trying to finish it out and am having trouble with a rough idle. It almost seems like it is running on 3 cylinders. I checked all the injectors and the spark plugs and everything looks fine. Compression looks consistent across all 4 cylinders. I have replaced the vacuum lines with no change.
The engine actually sounds really good from the front. The exhaust is what sputters. The car shakes a bit at idle. I was also thinking the balance belt might not be on properly after I removed the pullies. I might try to remove the balance belt for a trial.
The catalytic converter appears to be clogged. There is air be pushed out of a hole on the side of the cat. You can see the hole at the end of the second video.
Check out the two videos. Any suggestions would be appreciated.
http://www.youtube.com/watch?v=PhaSP9XMlws
http://www.youtube.com/watch?v=EPQ6goJO0aQ
Thanks
The engine actually sounds really good from the front. The exhaust is what sputters. The car shakes a bit at idle. I was also thinking the balance belt might not be on properly after I removed the pullies. I might try to remove the balance belt for a trial.
The catalytic converter appears to be clogged. There is air be pushed out of a hole on the side of the cat. You can see the hole at the end of the second video.
Check out the two videos. Any suggestions would be appreciated.
http://www.youtube.com/watch?v=PhaSP9XMlws
http://www.youtube.com/watch?v=EPQ6goJO0aQ
Thanks