Craigslist ad – C70 Convertible Manual Trans

I post CL ads I find quite regularly in the MVS Forums’ Classifieds. I don’t have any involvement with any of them — I’m not the seller and don’t know the seller or the car. I always put a disclaimer in my posts like: I don’t know the seller, don’t know the car, don’t know anything beyond what the ad says, and don’t have any interest in this sale. This post is intended to potentially provide a match between an MVS member and his future Volvo, or generate discussion because of the car’s rarity, beauty, or low price.

DIY: 1998 V70 ECT (Engine Coolant Temp) Sensor Replacement

So, when it is cold, the ECU injects extra fuel to start the engine. The problem is, when the ECT fails, it usually fails in “HOT” position (short-circuit inside the sensor), I have these 2 symptoms:

Aux fan runs on its own for about 6 minutes or so.
Hard start when COLD (ECU thinks it is hot and no need to inject extra fuel when it is COLD).

Diagnosing Bad Engine Mounts

The RPM are 840 on both “N” and “D”, however when I throw it on the “N”, the sound goes away.I tried, having it on “D” and holding the brakes, to raise RPM to about 1100, and that is when the noise is most evident.The best described it is a very low intensity roar and slight vibration.