2.0 V6 Lack of power

LelleH · 23rd August 2021, 13:40

Hello. I have an 75 2.0 V6 and it has no power after a few minutes. Full throttle goes not.And will not gear up (automatic gearbox). But put in the wintermode helps. Error code P0172+P0175. Been told to change sparkplugs.Has not been done in 16000km. Or can it be something worse?

xsport · 23rd August 2021, 13:52

by all means check the plugs over but mine have been in 40000 miles and still ok. check the mil codes out on here and go from there.

stevestrat · 23rd August 2021, 14:05

Quote:

Originally Posted by xsport

check the mil codes out on here and go from there.

Fault codes refer to the same problem on both banks:

P0172 System Too Rich (Bank 1)
P0175 System Too Rich (Bank 2)

roverbarmy · 23rd August 2021, 14:25

Blocked air filter or collapsed Shannon tube under wheel arch? Try removing air filter and disconnect the tube supplying the air filter to check.

itcaptainslow · 23rd August 2021, 15:32

With those fault codes and characteristics my first call would be a pre cat O2 sensor-get whoever has read the codes to check the live data. Once warmed up the O2 sensor should be switching from 0.1v to 0.9v approx quickly and with big jumps at least once a second at a fast idle.

trikey · 23rd August 2021, 19:04

Quote:

Originally Posted by itcaptainslow

With those fault codes and characteristics my first call would be a pre cat O2 sensor-get whoever has read the codes to check the live data. Once warmed up the O2 sensor should be switching from 0.1v to 0.9v approx quickly and with big jumps at least once a second at a fast idle.

I agree, check the lambda sensors, once they are ok make sure your vis motors are working (Stocktake on here can supply refurbished ones if you need some)

kaiser · 24th August 2021, 14:05

check for plugs not plugged into the sensors. Could be missing info for the computer box.

LelleH · 26th August 2021, 16:52

Hello again. Now my sparkplugs are replaced. They were awful. The center of the plugs were like a pyramid. And we found that a t-connection between the cylinderbanks vaccum was broken. Now the car behaves allright again. Thanks for all tips. Sorry for my English.I am from Sweden. And my mechanic do not want to change them again :P

vitesse · 26th August 2021, 17:42

Pleased you're sorted and it was a nice, easy fix although probably quite expensive. Lots of garages cheat on the spark plugs and just replace the easier front ones - best maintenance is usually that done by the owner. Hint, hint

Regards

ps. Swedish 75 group: https://www.facebook.com/groups/1800705170206717

xsport · 26th August 2021, 19:57

sounds good up to now and i hope its sorted. the breather pipes will make a big difference . however with the plugs being so bad would it all be down to the breather pipes ? sounds well rich to me. indeed if it cures everything all well and good. if it does come back then look again at the pre cat o2 sensor as suggested by trikey and while there check out the others. you should know soon enough as the M.I.L light will come on again with P.O errors. ....

23rd August 2021, 13:40	#1
LelleH Newbie Rover 75 Saloon Join Date: Sep 2014 Location: Hällekis Sweden Posts: 5 Thanks: 0 Thanked 1 Time in 1 Post	2.0 V6 Lack of power Hello. I have an 75 2.0 V6 and it has no power after a few minutes. Full throttle goes not.And will not gear up (automatic gearbox). But put in the wintermode helps. Error code P0172+P0175. Been told to change sparkplugs.Has not been done in 16000km. Or can it be something worse?

23rd August 2021, 14:25	#4
roverbarmy This is my second home Roverless + 1.7D Sportage Join Date: Aug 2014 Location: East Norfolk Posts: 7,050 Thanks: 729 Thanked 2,021 Times in 1,449 Posts	Blocked air filter or collapsed Shannon tube under wheel arch? Try removing air filter and disconnect the tube supplying the air filter to check. __________________ Oil in my veins!

24th August 2021, 14:05	#7
kaiser This is my second home 75 Tourer 2.5 Auto, 1.8T, 75V8ZT Join Date: Jun 2007 Location: Johannesburg ZA Posts: 6,200 Thanks: 1 Thanked 859 Times in 613 Posts	check for plugs not plugged into the sensors. Could be missing info for the computer box. __________________ Worth his V8 in gold

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23rd August 2021, 13:52	#2
xsport Posted a thing or two rover 75 club se Join Date: Apr 2011 Location: Leicester Posts: 1,637 Thanks: 358 Thanked 419 Times in 310 Posts	by all means check the plugs over but mine have been in 40000 miles and still ok. check the mil codes out on here and go from there.

23rd August 2021, 15:32	#5
itcaptainslow Avid contributor 200Vi & 214 SEi Join Date: Jul 2015 Location: Letchworth Posts: 196 Thanks: 36 Thanked 63 Times in 40 Posts	With those fault codes and characteristics my first call would be a pre cat O2 sensor-get whoever has read the codes to check the live data. Once warmed up the O2 sensor should be switching from 0.1v to 0.9v approx quickly and with big jumps at least once a second at a fast idle.

26th August 2021, 16:52	#8
LelleH Newbie Rover 75 Saloon Join Date: Sep 2014 Location: Hällekis Sweden Posts: 5 Thanks: 0 Thanked 1 Time in 1 Post	Hello again. Now my sparkplugs are replaced. They were awful. The center of the plugs were like a pyramid. And we found that a t-connection between the cylinderbanks vaccum was broken. Now the car behaves allright again. Thanks for all tips. Sorry for my English.I am from Sweden. And my mechanic do not want to change them again :P

26th August 2021, 17:42	#9
vitesse I really should get out more....... Rover 75 Saloon Join Date: Jul 2011 Location: Gävle Posts: 2,528 Thanks: 395 Thanked 823 Times in 652 Posts	Pleased you're sorted and it was a nice, easy fix although probably quite expensive. Lots of garages cheat on the spark plugs and just replace the easier front ones - best maintenance is usually that done by the owner. Hint, hint Regards ps. Swedish 75 group: https://www.facebook.com/groups/1800705170206717

26th August 2021, 19:57	#10
xsport Posted a thing or two rover 75 club se Join Date: Apr 2011 Location: Leicester Posts: 1,637 Thanks: 358 Thanked 419 Times in 310 Posts	sounds good up to now and i hope its sorted. the breather pipes will make a big difference . however with the plugs being so bad would it all be down to the breather pipes ? sounds well rich to me. indeed if it cures everything all well and good. if it does come back then look again at the pre cat o2 sensor as suggested by trikey and while there check out the others. you should know soon enough as the M.I.L light will come on again with P.O errors. ....