1999 Auto V70 Engine Runs Like a Pile of Rocks

[Pozzouk]

Originally Posted by TXC

If you're sure you've read and and interpreted it right, then those sensors are mis-plugged.

Definitely No.1 runs around .500V and No.2 fluctuates up and down it's range .065 to .800ish

Only No.1 ever threw a code - i think it was P0135.

As for mis-plugging up to this time and I've had it four years and never touched the back sensor and motor was running fine for three years - what would happen if i swapped them over i believe the connectors are identical and both of the four wire Denso variety.

[Chris_Rogers]

You may find this useful:

http://www.volvoforums.org.uk/showth...t=input+sensor

[Pozzouk]

Originally Posted by mikealder

That isn't right, after 30 minutes the cooling fan should have kicked in - did the rad fan kick in at all when you had it at idle? - Mike

No Fan!

If i get a chance today i'll go get a couple of resistors from Maplins and wire them in to give those fans a push. Not forgetting a pan of boiling oil

PS. Here are a couple of takes with the TSU connected before she got up to 100C unfortunately at this point the Autel ran out of memory.

OBDSUP OBD&OBDII

　

[ EOBD ]

Record13 -> Module $7A -> Live Data -> Complete Data Set

------------1------------

DTC_CNT 0

FUELSYS1 CL

FUELSYS2 --

LOAD_PCT(%) 22.7

ECT(°C) 76

SHRTFT1(%) -9.4

LONGFT1(%) 0.0

MAP(kPa) 30

RPM(rpm) 836

VSS(km/h) 0

SPARKADV(°) 12.0

IAT(°C) 33

MAF(g/s) 3.95

TP(%) 0.8

O2SLOC B1S12--B2S----

O2B1S1(V) 0.510

SHRTFTB1S1(%) -9.4

O2B1S2(V) 0.060

SHRTFTB1S2(%) 0.8

OBDSUP OBD&OBDII

------------2------------

DTC_CNT 0

FUELSYS1 CL

FUELSYS2 --

LOAD_PCT(%) 22.7

ECT(°C) 76

SHRTFT1(%) -9.4

LONGFT1(%) 0.0

MAP(kPa) 30

RPM(rpm) 847

VSS(km/h) 0

SPARKADV(°) 12.0

IAT(°C) 33

MAF(g/s) 3.92

TP(%) 0.8

O2SLOC B1S12--B2S----

O2B1S1(V) 0.505

SHRTFTB1S1(%) -8.6

O2B1S2(V) 0.065

SHRTFTB1S2(%) 0.8

OBDSUP OBD&OBDII

[Pozzouk]

Originally Posted by Chris_Rogers

You may find this useful:

http://www.volvoforums.org.uk/showth...t=input+sensor

Thanks Chris,

I noted that one as the codes were the same - In fact i delved down to the input sensor in mine last night - Eventually got it out and gave it a clean........no filings just a silvery smear but generally looked good plus it got all the connectors a good tugging and replugging!

Got it all back together and suspected engine running right (with this baby i have everything crossed - so never counting any chickens)

So, round the corner i went - two corner stops and as she came out of neutral at corner two we were back in safe mode and limp back around the block home - only to be met with the dead Autel - hence at this moment car limp and can't read the damned codes.

That's handy - an unanswered "mobile phone" at Discount Diagnostics.

[Chris_Rogers]

I wouldn't use oil, 'fire risk' the flash point of oil is usually below 100°C, water will be fine.

Your live readings look OK assuming the MAP pressure is absolute pressure.
What is the MAP pressure with the engine stopped?

The STFT is saying the ECU is leaning out the mixture nearly 10% at idle, but if you just reset the codes then it maybe the ECU is still adapting.

Have you checked the fuel pressure? a failing fuel preesure regulator will make the mixture rich at idle and lean under load.

Don't know which Autel reader you have but this may help if it needs reflashing.

http://www.talktomycar.co.uk/product...ware/mj208.htm

[Pozzouk]

Originally Posted by Chris_Rogers

I wouldn't use oil, 'fire risk' the flash point of oil is usually below 100°C, water will be fine.

Fire brigade on their way!!!

Your live readings look OK assuming the MAP pressure is absolute pressure.
What is the MAP pressure with the engine stopped?

Set
------------1------------
DTC_CNT 1
FUELSYS1 OL
FUELSYS2 --
LOAD_PCT(%) 89.0
ECT(°C) 15
SHRTFT1(%) 0.0
LONGFT1(%) -4.7
MAP(kPa) 100
RPM(rpm) 0
VSS(km/h) 0
SPARKADV(°) 11.5
IAT(°C) 15
MAF(g/s) 0.00
TP(%) 23.5
O2SLOC B1S12--B2S----
O2B1S1(V) 0.500
SHRTFTB1S1(%) 0.0
O2B1S2(V) 0.000
SHRTFTB1S2(%) 0.0
OBDSUP OBD&OBDII

Have you checked the fuel pressure? a failing fuel pressure regulator will make the mixture rich at idle and lean under load..

No not sure how i would go about that or find it?

Don't know which Autel reader you have but this may help if it needs reflashing.

You are the MAN - i really thought she'd killed it.

Below is the freeze frame as the box hit Safe Mode last night:

[ EOBD ]
Record1 -> Module $7A -> I/M Readiness
MIL Status ON
Misfire Monitor OK
Fuel System Mon OK
Comp. Component INC
Catalyst Mon INC
Htd Catalyst N/A
EVAP System Mon N/A
Sec Air System N/A
A/C Refrig Mon N/A
Oxygen Sens Mon INC
Oxygen Sens Htr OK
EGR System Mon N/A


[ EOBD ]
Record1 -> Module $7A -> Freeze Frame
DTCFRZF P1618
FUELSYS1 OL
FUELSYS2 --
LOAD_PCT(%) 66.7
ECT(°C) 95
SHRTFT1(%) -5.5
SHRTFT3(%) -100.0
LONGFT1(%) 0.0
LONGFT3(%) -100.0
MAP(kPa) 78
RPM(rpm) 1852
VSS(km/h) 18

Apologies to those who are getting tired of this saga - perhaps i should of stuck to the Triumph Herald or the CF Bedford.

[mikealder]

The simple reason I use oil (as in cooking oil) to test a temp sensor is the need to go past 100 deg C without getting scalded by water boiling all over the place.
Cooking oil will quite happily go to 190 Deg C with no issue or risk of fire although at 190 it will be at the point of starting to smoke so taking it only to 120 Deg C lets you map the resistance on the terminals of the CTS across it's full operating range.
To use water requires presure to prevent the water boiling, the fan will only switch on at 105 Deg C so to check the resistance at this temp needs cooking oil and a thermometer - Mike

[Chris_Rogers]

MAP 100 kPa (atmospheric pressure at engine stopped) is spot on.

30 kPA absolute at idle is about 20" Hg vacuum and is a good figure even for a new engine.

The freeze frame is giving values when the auto gearbox DTC P1618 is set I can't see much info of value here.

I still think you should concentrate on the gearbox fault.

If you get the Autel software and load the Volvo app, you should be able to read the Volvo fault codes which are much more useful then generic OBDII.

The live data I've seen so far shows the car going into Closed Loop control with reasonable fuel trims, it would not do this if there was a problem with Lambda sensor(s).

[kevvydude]

pozzouk, if you need any bits i have a complete v70 98 im breaking, im only 30 miles from you, so please ask, if i can help i will, regards kev

[Pozzouk]

Originally Posted by mikealder

Cooking oil will quite happily go to 190 Deg C with no issue or risk of fire although at 190 it will be at the point of starting to smoke - Mike

I thought that too and will be testing this afternoon - I did notice this morning when Chris suggested the Map Pressure that the TSU was reading the ambient air temperature bang on 15C as it was, i presume this is the ECT that shows in the diag list??? If so seemed to be working fine at the lower end of the spectrum.

Cheers Mike.