Sluggish Off The Line, No "oomph" Or Message; Assistance Req

mcaanda · Post by **mcaanda** » 24 Mar 2010, 16:13

STATS: 2006 S60R, 59K miles, auto trans

COMPLAINT / ISSUE: Wife said today that the car was very sluggish and was lacking the "oomph" that it usually has when driven.

BASICS: No leaks, good on oil, water, and no codes. No flashing SES, no misfires, nada, which really has me wondering. Checked the "messages" in the car and the same, states none. No obvious disconnected lines, hoses, ect. No smoke blue or black out the exhaust as well.

Confirmed the lack of power with a test drive after work, & there is a serious lack of "go fast" with the car.

I DID notice that when the car is turned on, ( engine started ) the fan immediately turns on and goes into high speed sounding like a jet about to take off. The oil recirculation sounds as if its working, as when the car is turned off the pump will continue for a bit and then turn off.

Main fan will continue for a bit post the turn off of the car, and then turn itself off after a short ( +/- 10 seconds? ) run off when the ignition is turned OFF.

I disconnected the fan and re-started the car to which is sounds pretty normal per say, I've been pretty lucky with the fact that I have not had to spend a bunch of time under the hood so that's subjective.

Thoughts / ideas welcome - Im pretty handy w/ this kinda stuff but really have limited knowledge with the Volvo line as its our first. I was thinking boost line, but the fan issue has me wondering...

Currently its sitting for an ECM reset & I will check here in about 1o...

Thanks in advance.

Post by **jblackburn** » 24 Mar 2010, 19:07

Good work on including the fan issue

I think your problem may well be the engine coolant temp. sensor. If it doesn't know the real temperature of the car, it may be adding tons of gas, as for a cold engine, and bogging down on that. Then the fan runs just as a precaution anyway to keep it from overheating. You'll probably get a message at some point.

You can order the sensor and change it yourself - we usually advise to do the thermostat at the same time as cheap insurance to keep yourself from having to get into the housing again. This is a very easy fix on the 5-cylinder Volvos, the thermostat housing sits right on top of the engine and is easy to get to.

mcaanda · Post by **mcaanda** » 24 Mar 2010, 19:44

jablackburn -

Good call on the sensor - come to find out there is a TSB that is out for the 06 S60's that have a ECM issue program update for just this specific issue. I will also be looking into a sensor as there are a couple people that I have spoken with that have had the update, and the issue returned. While I think that it could possibly be throwing good $$ at bad, like the T-Stat it may be cheap insurance.

The pic is great as well - I appreciate it.

Post by **JDS60R** » 24 Mar 2010, 19:59

Get the ECM flash and adda coolant sensor if the old one tests out wrong.
This could just be a TCV (Turbo Control Valve)