1990 S4 Surging - Barely Running
05-14-2019, 12:47 AM
#46
Rennlist Member
Thread Starter
I'm a believer in using an extended-shaft nutdriver or a socket on extension for the MAF clamps. Once engaged, the nutdriver or socket takes a lot less effort to keep indexed on the clamp as you adjust the clamp You don't have to push as you do with a screwdriver, so the clamp has less tendency to walk away around the boot..
05-14-2019, 12:50 AM
#47
Rennlist Member
Thread Starter
Update...MAF was the answer. Idle good and steady now. Car takes fuel and revs as it should. Button up and shake down tomorrow.
Thanks to all for the advice and assistance.
Dave C. I'll continue with the diagnostics to see what else might be out of whack, but at least things are back where they were and I'm on the road!
Thanks to all for the advice and assistance.
Dave C. I'll continue with the diagnostics to see what else might be out of whack, but at least things are back where they were and I'm on the road!
05-14-2019, 02:17 PM
#48
Addict
Rennlist Member
Rennlist Member
Join Date: Oct 2003
Location: Gone. On the Open Road
Posts: 16,328
Received 1,543 Likes
on
1,007 Posts
That’s good news.
There is a Mass-Air Sensor failure mode that can cause this super-undriveable behavior, but I’m lead to believe that it’s only possible for a version of the sensor that was pre-‘87.5. Thus, your sensor may have already been swapped-out?
If you are pretty sure it was the original sensor, then you may have something else that needs attention.
Dave C. I'll continue with the diagnostics to see what else might be out of whack, but at least things are back where they were and I'm on the road!
05-14-2019, 03:01 PM
#49
Rennlist Member
Thread Starter
That’s good news.
There is a Mass-Air Sensor failure mode that can cause this super-undriveable behavior, but I’m lead to believe that it’s only possible for a version of the sensor that was pre-‘87.5. Thus, your sensor may have already been swapped-out?
If you are pretty sure it was the original sensor, then you may have something else that needs attention.
[color=#333333]
My doc has alotta stuff you can check...
There is a Mass-Air Sensor failure mode that can cause this super-undriveable behavior, but I’m lead to believe that it’s only possible for a version of the sensor that was pre-‘87.5. Thus, your sensor may have already been swapped-out?
If you are pretty sure it was the original sensor, then you may have something else that needs attention.
[color=#333333]
My doc has alotta stuff you can check...
Thanks again!