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Tsb info for a 1998 motronic 4.4 elevation flash

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

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paul c
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Tsb info for a 1998 motronic 4.4 elevation flash

Post by paul c » Tue Jan 30, 2018 7:45 pm

I've done a few searches and have come up empty. I'm looking for info on that tsb for the 1998 turbo cars on reflashing the ECM. A local dealer still has a functioning compaq laptop to do that flash. I just want to see if anyone has a copy or link to that tsb so I can check if my car falls with in the VIN range. Thanks

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Re: Tsb info for a 1998 motronic 4.4 elevation flash

Post by erikv11 » Tue Jan 30, 2018 10:21 pm

Flashing the ECU is very easy these days, you can do it yourself with investment of a little time and common, cheap hardware. However I've never heard of an "elevation flash." Curious to see if anyone else has.
'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 286k
'06 S60 R, 167k
'99 Camry V6 :shock: 125k
gone: '96 NA 850 210k, '98 NA V70 182k

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Re: Tsb info for a 1998 motronic 4.4 elevation flash

Post by abscate » Wed Jan 31, 2018 6:49 am

Flash for altitude? Don’t most every Systems monitor mass flow and pressure directly?
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Re: Tsb info for a 1998 motronic 4.4 elevation flash

Post by RickHaleParker » Wed Jan 31, 2018 8:16 am

Flash for altitude? Don’t most every Systems monitor mass flow and pressure directly?

There is a altitude sensor, the ECM uses it to adjust boost and fuel mixture for air density.
On your '99 V70 it is located on the same mounding bracket as the outside temperature sensor.

The altitude sensor on my '98 C70 get wanky ~ 0°F makes it hard to start the engine.
Last edited by RickHaleParker on Wed Jan 31, 2018 8:27 am, edited 2 times in total.
--------
Platform: P80 1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
Platform: X40 (Nedcar) 2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
Platform P2 2004 S60R, B2524T4, AW50/51 AWD, B8444S TF80 AWD, Bosch Motronic 7.0, BorgWarner K24 turbocharger. V8 conversion in progress.

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Re: Tsb info for a 1998 motronic 4.4 elevation flash

Post by erikv11 » Wed Jan 31, 2018 8:17 am

Yes, Motronic 4.4 monitors both.
'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 286k
'06 S60 R, 167k
'99 Camry V6 :shock: 125k
gone: '96 NA 850 210k, '98 NA V70 182k

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abscate
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Re: Tsb info for a 1998 motronic 4.4 elevation flash

Post by abscate » Wed Jan 31, 2018 10:24 am

Im noddling on this a bit. If the MAF really measures mass of air then the pressure should not really matter. Of course, it doesn't actually weigh the air, I believe ours are hotwire type sensors that measure cooling or heat transfer . That property would be a function of the density of the air flow, but it might intrinsically correct for pressure change..

Hmmm
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Re: Tsb info for a 1998 motronic 4.4 elevation flash

Post by RickHaleParker » Wed Jan 31, 2018 11:23 am

If the MAF really measures mass of air then the pressure should not really matter.

Try solving this problem then maybe your get it.

The MAF is 12.5 grams per second. How much oxygen is there in one liter of air?
--------
Platform: P80 1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
Platform: X40 (Nedcar) 2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
Platform P2 2004 S60R, B2524T4, AW50/51 AWD, B8444S TF80 AWD, Bosch Motronic 7.0, BorgWarner K24 turbocharger. V8 conversion in progress.

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Re: Tsb info for a 1998 motronic 4.4 elevation flash

Post by misha » Wed Jan 31, 2018 11:34 am

Air or oxygen is not measuring in liters....it measures in grams or kilograms.
Am i missing something here?
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Re: Tsb info for a 1998 motronic 4.4 elevation flash

Post by RickHaleParker » Wed Jan 31, 2018 11:41 am

Am i missing something here?

Air and Oxygen can be measured by Weight, Volume, Mass or Moles. Engine displacement is measured by volume.
--------
Platform: P80 1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
Platform: X40 (Nedcar) 2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
Platform P2 2004 S60R, B2524T4, AW50/51 AWD, B8444S TF80 AWD, Bosch Motronic 7.0, BorgWarner K24 turbocharger. V8 conversion in progress.

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