Hello all! After sitting for a few days, my car refused to start. Cranks, seems like it wants to start but then dies almost immediately. I checked all the sensor signals right to the ecu connector, I have spark, I have fuel pressure, but the motronic 4.3 is not activating the injectors.
My suspicion was the immo 2 box being unhappy, because if I load an older '94 2.0T program into the motronic eprom, the injectors are firing and the car starts up. However I have also replaced the immo box now and the chip in the key, but the car still won't start up (at least with the original firmware).
What am I missing, what could I try next? Please help, I'm about to set this beautiful white brick on fire..
1996 850 2.0 GLT won't start, please help
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danielb314
- Posts: 4
- Joined: 29 August 2023
- Year and Model: 1996
- Location: Budapest
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5rivers
- Posts: 531
- Joined: 27 February 2009
- Year and Model: V70 1998 T5
- Location: The North Country, NYS
- Been thanked: 14 times
Hey there!
In this forum there are lots of similar posts, many of which say start checking your relays and sensors. I would recommend reading the posts. And check out the repair database as well, there is a "no-start" page that might help. In your case, the fuel relay, cam sensor, rotor, and fuses would be top of my list.
I am not familiar with anything ECU related, sorry!
Keep posting your progress and those with much more experience than I will chime in!
In this forum there are lots of similar posts, many of which say start checking your relays and sensors. I would recommend reading the posts. And check out the repair database as well, there is a "no-start" page that might help. In your case, the fuel relay, cam sensor, rotor, and fuses would be top of my list.
I am not familiar with anything ECU related, sorry!
Keep posting your progress and those with much more experience than I will chime in!
5rivers
1998 V70 M56, silver/grey, has tranny issues, #?# owner, 330,xxx miles, a handy parts car
1998 V70 AT, nautical blue, 2nd owner, 260,000 miles, Sold
1998 V70 AT, T5, forest green, 3rd owner, 172,300 miles, Mimas 16" rims
1998 V70 M56, silver/grey, has tranny issues, #?# owner, 330,xxx miles, a handy parts car
1998 V70 AT, nautical blue, 2nd owner, 260,000 miles, Sold
1998 V70 AT, T5, forest green, 3rd owner, 172,300 miles, Mimas 16" rims
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danielb314
- Posts: 4
- Joined: 29 August 2023
- Year and Model: 1996
- Location: Budapest
Hey 5rivers, thanks for the reply! I have read a lot of no-start posts, and checked and ruled out the relays and sensors by now.
At the moment I am able to start the car with a different ECU program that does not have immo check, the biggest issue is that it seems to be a manual ecu program my automatic transmission shifts are very rough..
If anyone happens to have a US or pre-immo ('95?) 2.0 GLT 132KW .bin file, that would be super helpful!
At the moment I am able to start the car with a different ECU program that does not have immo check, the biggest issue is that it seems to be a manual ecu program my automatic transmission shifts are very rough..
If anyone happens to have a US or pre-immo ('95?) 2.0 GLT 132KW .bin file, that would be super helpful!
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danielb314
- Posts: 4
- Joined: 29 August 2023
- Year and Model: 1996
- Location: Budapest
Ok I managed to solve it! Seems like the automatic transmission is handled inside the ECU but not within the eeprom program, so I uploaded the older (non-immo) program to my own ECU (I've been using a spare one previously, from a manual car), and lo and behold the car starts up and shifts perfectly. This issue was the biggest headache my 850 caused so far.. 
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jmartin919
- Posts: 298
- Joined: 12 July 2013
- Year and Model: S70 GLT SE 2000
- Location: Durham, NC
- Has thanked: 94 times
- Been thanked: 39 times
Why not replace the immobilizer, or am I missing something?
'00 S70 GLT SE
'82 MB 380SL
'11 MB E350 Sport
'84 Chevy C10
'93 850 GLT NA SOLD
'82 MB 380SL
'11 MB E350 Sport
'84 Chevy C10
'93 850 GLT NA SOLD
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misha
- Posts: 5379
- Joined: 7 December 2008
- Year and Model: '97 850 2.5 20v
- Location: Serbia
- Has thanked: 152 times
- Been thanked: 402 times
Because EU market '96 have chipped keys.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
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5rivers
- Posts: 531
- Joined: 27 February 2009
- Year and Model: V70 1998 T5
- Location: The North Country, NYS
- Been thanked: 14 times
I'm glad you figured out a solution to your problem!!! I still have lots to learn about ECU's...
5rivers
1998 V70 M56, silver/grey, has tranny issues, #?# owner, 330,xxx miles, a handy parts car
1998 V70 AT, nautical blue, 2nd owner, 260,000 miles, Sold
1998 V70 AT, T5, forest green, 3rd owner, 172,300 miles, Mimas 16" rims
1998 V70 M56, silver/grey, has tranny issues, #?# owner, 330,xxx miles, a handy parts car
1998 V70 AT, nautical blue, 2nd owner, 260,000 miles, Sold
1998 V70 AT, T5, forest green, 3rd owner, 172,300 miles, Mimas 16" rims
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misha
- Posts: 5379
- Joined: 7 December 2008
- Year and Model: '97 850 2.5 20v
- Location: Serbia
- Has thanked: 152 times
- Been thanked: 402 times
In '96?
...and '94 2.0 T?
Those engines didn't existed for 850.
Engine is swapped from s,v70(B5204T2).
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
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