hello, i recently purchased a 2005 volvo s40 t5R it has the 2.5L turbo motor with a 6 speed manual and is fwd. i bought the vehicle broken, and after putting a new battery and charging the car it turned over but really slow and it wouldnt fire! im new to volvos and need some help here? i scanned the car and a cam shaft knock sensor come up... please let me know if u guys have any clue what it could be so i can get my baby up and running!

 

start by checking your cables from the battery to the ground and to the starter motor. Its possible the starter is weak but I'd start with the connections. Any sense of what happened when the vehicle "broke"? ie shut down when running, wouldn't start one day etc. Next I'd try starting with jumpers - is your battery new new or just another battery from a different car? once you get it cranking at a normal speed, then you can start working the spark/fuel triage. You may even want to do a compression test to see if "broke" is really broke...

 

There is broken and then there is really broken. Does it have an intact timing belt?

 

Yes the timing belt was switched by Volvo less then 30,000 km ago so I know it's all lined up, kinda why I'm scared to start taking the head off!! But I've decided to start a rebuild on my motor I have a month to get it running!! I'll post pictures soon and please help if u know anything about my issue by the way I took my camshaft knock code and deleted it and all the other codes on the car then I turned off the immobilizer but as soon as I throw the key on its immobilized again!!! ****ing car must be throwing a code the second I try to start it

 

Thank you, and it's a brand brand new battery that was fully charged and then we also tried with booster cables after, but it's struggling to turn over is the problem!! And I'm running a compression test today on it so I'll let u know the results of that! Thanks again

 

when you do the compression test, just remember to remove all the plugs (so only the cylinder with the gauge is holding compression) - also do a dry then wet (dropping a tbs or so of oil to coat the rings in the wet test should also help if the walls are dry as can happen when the fuel washes the oil off)