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Derek Werner
Derek Werner, Volvo Master Technician
Category: Volvo
Satisfied Customers: 135
Experience:  ASE Master Technician, L1 Advanced Level Specialist, Volvo Master Technician
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2001 s80 t6 surges on acceleration than stalls, no check

Customer Question

2001 s80 t6 surges on acceleration than stalls
JA: Is the check engine light on? Does the car stall at idle or when driving?
Customer: no check engine, does not stall at idle
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: turbo control valves, all turbo tubes sealed .
JA: Anything else you think the mechanic should know?
Customer: car has 151 k run good when cold
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Volvo Mechanic about your situation and then connect you two.
Submitted: 3 months ago.
Category: Volvo
Expert:  Derek Werner replied 3 months ago.

Hello and thanks for using JustAnswer!

I am Derek, a master Volvo technician and i will be happy to help with your S80.

The most common cause for the problem you are describing is a failing fuel pump. When cold the pump will work normally and as it heats up it can cause the problem exactly as you described.

To test the fuel pump is very easy, there is a fuel pressure test port located on the fuel rail. You will need to rent or buy a fuel pressure gauge from a auto parts store.

I would recommend testing or replacing the fuel pump first.

If you have any other questions please let me know.