Stage 0 and So Much More… Fix List for a V70

MVS Contributor Sledddriver goes on an multi-month blistering repair & fix odyssey, taking his 1998 V70 T5 from the edge of roadworthiness to 100% functional and reliable… all for not even $1000.  This is Stage 0 and way, way more. Following up on Tryingbe’s theme [of restoring to 100% a P80 Volvo], here’s a list of sled-work […]

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).

2000 V40 Temp Gauge Erratic and Engine Surging

The new temp. sensor (ECT) did the trick – cured all of the temp. gauge problems. My only current problem is a P0128 OBD check engine code. My research suggests that the problem is probably an aging thermostat. I’ll ignore it for awhile and see what happens. 2000 V40 Temp Gauge Erratic and Engine Surging