Volvo s80 '06 B5244S, start, runs 2 sec then dies

Tonnes1977 · Post by **Tonnes1977** » Thu Feb 17, 2022 7:13 pm

Hi Guys, there are no dtc's stored and the data like cooling temp, airtemp and press, fuel press(by measuring) is ok. I did use the pico and i see a strange behavior of the fuel injector. It seems that the crank and cam correlation is ok. I compared this with a file from Volrem in the file libary, althought this car is running. The ignition timing seems good too by comparison to a diff file in libary. I connected injector 1, coil 1, crank and cam to the scope. Who can help me and could tell me what i can do to fix this problem?

vasek · Post by **vasek** » Fri Feb 18, 2022 2:48 pm

Hello.
The duration of the injector pulse after entering the idle mode is clearly underestimated .
Possible cause - leaky intake.
Or - incorrect readings of the air flow meter.
That's about how it should be with a hot start :

Tonnes1977 · Post by **Tonnes1977** » Sat Feb 19, 2022 5:31 pm

Hi Vasek,

Your information

did solve the problem

I did some research before on an intake leak and couldnt find it.

But, the connection on the air flow meter was de problem, when i pull the wire down the car did start and dies but when i pull it up the car didnt stall after start!

Big thx!

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