T4 power loss

mat_g · Oct 26th, 2005, 15:04

I have a problem with my 99 V40 T4 losing power. On a recent journey after I'd driven about 20-30 miles the engine went lumpy and kept losing power until it stopped, and wouldn't restart.

The breakdown arrived and after several checks sprayed WD40 into the large pipe attached to the air cleaner. The car started, but the lamba warning light came on. The breakdown guy reckoned it could be the cat breaking-up and blocking the exhaust. So he recovered the car home, where it sat on the drive all day Sunday.

On Monday i take the car to my independent Volvo garage. The warning light is now off and the car is fine. So i drive around for 15 miles, but it's still fine. I leave it with the garage. They run some tests and reckon it might be the air flow meter, and reckon the cat should be fine, but they cannot replicate the problem.

Has anyone else had a similar experience with their V40? Any cat or air flow problems? Incidently my car has done 118k miles.

Any help would be greatly appreciated.

cheers,
Mat.

Oct 26th, 2005, 15:25

Why would spraying wd40 into the air intake , unblock the cat?

but sorry no usefull info from me.

pyaap · Oct 26th, 2005, 15:31

Have the fuel rail pressure checked. If its a little on the low side, your fuel pump may be on its way out. I doubt its the MAF sensor because even if that was faulty, you should be able to disconnect it and still start the car.

If it turns out that the fuel pump has indeed failed, it is possible to get direct replacement high-flow pumps which are substantially cheaper than the Volvo supplied one (mainly because it comes as a complete assembly from Volvo).

CJL · Oct 26th, 2005, 15:32

Yes, I've had exactly the same on my '99 V40 T4. Like yours it was fine the next day, but after reading similar problems on this forum, I decided the fuel pump was the probable cause and changed it rather than risk a repeat breakdown.

That was about 2 years / 30,000 miles ago and the problem hasn't come back.

Do a search for "fuel pump" on here...plenty more info I'm sure.

Colin.

mat_g · Oct 26th, 2005, 19:51

cheers for the responses. I'll ask the garage about the fuel pump.

My original message was a bit brief about the breakdown guy's diagnosis. He actually offered several suggestions including, fuel starvation and cat breaking-up.

I've had the car run rough before, but that was towards the end of a run so it had time to cool down before being driven again. That time, and this recent breakdown the car has been a little low on fuel (just above red). Not sure if that's related?

rgds,
Mat.

Oct 26th, 2005, 15:04	#1
mat_g Junior Member Last Online: Nov 1st, 2019 12:34 Join Date: Oct 2004 Location: Southampton View Photos By: mat_g	T4 power loss I have a problem with my 99 V40 T4 losing power. On a recent journey after I'd driven about 20-30 miles the engine went lumpy and kept losing power until it stopped, and wouldn't restart. The breakdown arrived and after several checks sprayed WD40 into the large pipe attached to the air cleaner. The car started, but the lamba warning light came on. The breakdown guy reckoned it could be the cat breaking-up and blocking the exhaust. So he recovered the car home, where it sat on the drive all day Sunday. On Monday i take the car to my independent Volvo garage. The warning light is now off and the car is fine. So i drive around for 15 miles, but it's still fine. I leave it with the garage. They run some tests and reckon it might be the air flow meter, and reckon the cat should be fine, but they cannot replicate the problem. Has anyone else had a similar experience with their V40? Any cat or air flow problems? Incidently my car has done 118k miles. Any help would be greatly appreciated. cheers, Mat.

Oct 26th, 2005, 15:25	#2
alfonzobonzo Guest Location:	RE: T4 power loss Why would spraying wd40 into the air intake , unblock the cat? but sorry no usefull info from me.

Oct 26th, 2005, 15:31	#3
pyaap Non-T4 T4s RULE!!!! Last Online: Mar 29th, 2017 11:24 Join Date: Nov 2002 Location: Bristol / Bath	RE: T4 power loss Have the fuel rail pressure checked. If its a little on the low side, your fuel pump may be on its way out. I doubt its the MAF sensor because even if that was faulty, you should be able to disconnect it and still start the car. If it turns out that the fuel pump has indeed failed, it is possible to get direct replacement high-flow pumps which are substantially cheaper than the Volvo supplied one (mainly because it comes as a complete assembly from Volvo).

Oct 26th, 2005, 15:32	#4
CJL Master Member Last Online: Mar 28th, 2022 18:46 Join Date: Dec 2003 Location: London	RE: T4 power loss Yes, I've had exactly the same on my '99 V40 T4. Like yours it was fine the next day, but after reading similar problems on this forum, I decided the fuel pump was the probable cause and changed it rather than risk a repeat breakdown. That was about 2 years / 30,000 miles ago and the problem hasn't come back. Do a search for "fuel pump" on here...plenty more info I'm sure. Colin.

Oct 26th, 2005, 19:51	#5
mat_g Junior Member Last Online: Nov 1st, 2019 12:34 Join Date: Oct 2004 Location: Southampton View Photos By: mat_g	RE: T4 power loss cheers for the responses. I'll ask the garage about the fuel pump. My original message was a bit brief about the breakdown guy's diagnosis. He actually offered several suggestions including, fuel starvation and cat breaking-up. I've had the car run rough before, but that was towards the end of a run so it had time to cool down before being driven again. That time, and this recent breakdown the car has been a little low on fuel (just above red). Not sure if that's related? rgds, Mat.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)