Thanks. I just ordered new O2 sensors and exhaust manifold gaskets.

After inspecting all the intake pipes and vacuum lines, I could not find any that were loose or not fully seated. So since it was running great prior to throwing the Misfire Cylinder #3 code I took a flyer and replaced the #3 coil this morning before work. Fingers crossed, but it ran normally this m...

Drove it home after work. Stumbled a bit right after it started....a gave it a little throttle and it smoothed out and drove normally on the way home. It's a 7 minute commute. Upon pulling into my carport the idle was smooth but just a little off of how smooth it was before the ETM acted up last wee...

Thanks for the response. Yes, the replacement XeMODeX ETM came with a new OEM Volvo gasket, which I used. When I initially fired it up it idled awful and I discovered I didn't get the intake tube seated on the ETM. I loosened the clamp and believe I got it seated. That might be something to re-check...

The car was running great until last week I drove home about 5 miles for lunch and when I started it up to come back to work it would barely idle and went into limp mode. No check engine light but I pulled codes after work and showed ECM-91F0 ETM internal fault. After a quick email to XeMODeX I had ...

abscate wrote: ↑30 Nov 2017, 19:28 Did you end up with about 225k miles on your original ETM? Well done!

Yes, I changed it in June at just over 230k and it was the original unit.

***RESOLVED***

I just wanted to update this post that I replaced the ETM with a XemodeX and it has great throttle response and all the issues hunting idle after driving on the freeway and surging idle are gone.

***RESOLVED***

I just wanted to update this post that I replaced the ETM with a XemodeX and it has great throttle response and all the issues hunting idle after running on the freeway are gone.

If the timing belt was changed at 160K, that wouldn't be my first thought.

Does it have its original ETM?

What does your local indie miracle worker think?

Quick update.... The problem is getting worse. It now does it at times other than after driving on the freeway. I notice most of the time when it drops to idle, it hunts up and down twice before settling back to idle. And when the car is warm, is does the same thing very lightly...very light stumble...