V40 2001 1.8 auto sluggish

portal · Jan 9th, 2019, 21:53

Hi
My 2001 v40 1.8 auto is a sluggish performer. It's not the GDI. Engine cover stamped Volvo not GDI.

It's driveable and usable. There are no OBD codes and no engine management warnings.
No smoke, starts on the button. Sits at 80mph fine. Auto box changes fine.
Service history shows VVT pulley recently replaced. Oil and coolant looks fine.

It's just a slow old hector pulling away, slightly worse when cold. Pulls better after 2500rpm.

Temperature gauge sits a bit low, and heater output is low. Not checked resistor jobby yet, as thinking I've got a slightly open rad stat. Hose to rad gets warm after a minute or two even when engine remains stone cold. So think stat is always part open.

Any thoughts on my sluggish performance?

V40T4R · Jan 9th, 2019, 23:11

Maybe too rich because engine not reaching correct temperature...

emtor · Jan 10th, 2019, 06:32

Quote:

Originally Posted by V40T4R

Maybe too rich because engine not reaching correct temperature...

If too rich the sparkplugs will show it. Pull them and look at them.
Also, if you have a scanner the fuel trim will be higher than normal.

portal · Jan 10th, 2019, 13:03

Thermostats have arrived - will fit when I get the chance and go from there.

I've actually got 2 parts to choose from.

Circoli 209440040, which opens at 90-92 degrees
or
Circoli 209660140, which opens at 87-90 degrees

Any thoughts on which to opt for? They were so cheap I bought both to avoid bother.

portal · Jan 14th, 2019, 12:42

New thermostat fitted today. Car now comes nicely up to temperature. Heater blowing nice and hot. Opted for the 90-92 stat.

Temperature gauge showing rock-steady whether sat idling, driving slow, fast or being hammered.

When pushing it hard, Auto box held onto a couple of gears until 6,000rpm. Not seen that before, it's normally changed earlier.

Will give it a few Italian tune ups, followed by a can of BG44K. Then I'll report back.

portal · Jan 19th, 2019, 20:03

Hi, car runs much better now when warm.

However, still feels a bit flat to me. So one suggested I might need to change the fuel filter. Is that likely?

Not used the fuel treatment yet.
Thx

Jan 9th, 2019, 21:53	#1
portal Junior Member Last Online: Jul 30th, 2019 21:35 Join Date: Jan 2015 Location: Ipswich	V40 2001 1.8 auto sluggish Hi My 2001 v40 1.8 auto is a sluggish performer. It's not the GDI. Engine cover stamped Volvo not GDI. It's driveable and usable. There are no OBD codes and no engine management warnings. No smoke, starts on the button. Sits at 80mph fine. Auto box changes fine. Service history shows VVT pulley recently replaced. Oil and coolant looks fine. It's just a slow old hector pulling away, slightly worse when cold. Pulls better after 2500rpm. Temperature gauge sits a bit low, and heater output is low. Not checked resistor jobby yet, as thinking I've got a slightly open rad stat. Hose to rad gets warm after a minute or two even when engine remains stone cold. So think stat is always part open. Any thoughts on my sluggish performance?

Jan 9th, 2019, 23:11	#2
V40T4R Senior Member Last Online: Apr 21st, 2024 15:34 Join Date: Nov 2015 Location: Porto	Maybe too rich because engine not reaching correct temperature... __________________ Phase 1 MY99 Manual V40 T4

Jan 10th, 2019, 13:03	#4
portal Junior Member Last Online: Jul 30th, 2019 21:35 Join Date: Jan 2015 Location: Ipswich	Thermostats have arrived - will fit when I get the chance and go from there. I've actually got 2 parts to choose from. Circoli 209440040, which opens at 90-92 degrees or Circoli 209660140, which opens at 87-90 degrees Any thoughts on which to opt for? They were so cheap I bought both to avoid bother.

Jan 14th, 2019, 12:42	#5
portal Junior Member Last Online: Jul 30th, 2019 21:35 Join Date: Jan 2015 Location: Ipswich	New thermostat fitted today. Car now comes nicely up to temperature. Heater blowing nice and hot. Opted for the 90-92 stat. Temperature gauge showing rock-steady whether sat idling, driving slow, fast or being hammered. When pushing it hard, Auto box held onto a couple of gears until 6,000rpm. Not seen that before, it's normally changed earlier. Will give it a few Italian tune ups, followed by a can of BG44K. Then I'll report back.

Jan 19th, 2019, 20:03	#6
portal Junior Member Last Online: Jul 30th, 2019 21:35 Join Date: Jan 2015 Location: Ipswich	Hi, car runs much better now when warm. However, still feels a bit flat to me. So one suggested I might need to change the fuel filter. Is that likely? Not used the fuel treatment yet. Thx

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