Also, check the driver side plenum for leaves and flow obstruction.
This can lead to "CEM" (mounted near the steering wheel area) failure.
2006 XC90 Occasional Hesitation on Hard Acceration
-
batman00024
- Posts: 7
- Joined: 30 September 2015
- Year and Model: 2006 XC90
- Location: USA
My PEM was inside the car, under the seats and carpeting.
Fuel filter was replaced. No change.
Also replaced the turbo control solenoid. No change.
Fuel filter was replaced. No change.
Also replaced the turbo control solenoid. No change.
Last edited by batman00024 on 25 Oct 2015, 21:23, edited 2 times in total.
-
batman00024
- Posts: 7
- Joined: 30 September 2015
- Year and Model: 2006 XC90
- Location: USA
Final Entry
The car continued to have hesitation on hard acceleration. Progressively got worse and more frequent, to the point of the car was stalling constantly and having no acceleration. I tested the fuel pressure for an extended period of time, and fuel pressure was around 44psi. When the hesitation occurred, fuel pressure would drop to 9psi.
After spending many hours troubleshooting and changing parts, the problem continued. I finally broke down and took car to a Volvo dealership for a diagnostic. After waiting for over an hour, and speaking with the tech, he determined that it's probably the fuel pump. This even after I just replaced the fuel pump less than a month before (with new OEM Volvo fuel pump)
I sent back the fuel pump and got a new one as a replacement. Prior to putting the new fuel pump in, I emptied all the fuel and wiped out the bottom of the tank as much as I could. This after reading some people had sediment in their tank. I let the tank air out for a few days while I waited for the new one to arrive.
I installed the new fuel pump and it's been working great.
Final resolution: fuel pump
The car continued to have hesitation on hard acceleration. Progressively got worse and more frequent, to the point of the car was stalling constantly and having no acceleration. I tested the fuel pressure for an extended period of time, and fuel pressure was around 44psi. When the hesitation occurred, fuel pressure would drop to 9psi.
After spending many hours troubleshooting and changing parts, the problem continued. I finally broke down and took car to a Volvo dealership for a diagnostic. After waiting for over an hour, and speaking with the tech, he determined that it's probably the fuel pump. This even after I just replaced the fuel pump less than a month before (with new OEM Volvo fuel pump)
I sent back the fuel pump and got a new one as a replacement. Prior to putting the new fuel pump in, I emptied all the fuel and wiped out the bottom of the tank as much as I could. This after reading some people had sediment in their tank. I let the tank air out for a few days while I waited for the new one to arrive.
I installed the new fuel pump and it's been working great.
Final resolution: fuel pump
My XC90 is doing the exact same thing as described here, and I too changed everything related to fuel pressure, second fuel pumps as well, so I kind of doubt it can be this again. I get drop in fuel pressure to 8 to 11 PSI only while under full accelerations, s but 44 PSI under idle and normal driving. This issue has been a nightmare for months and dread the thought of having to change fuel pumps again.
UPDATE:
As crazy as it sounds, must of been dirty fuel again as filter was clogged again. I get gas at same place almost all the time, so I thought these gas stations had filters on pumps? A trick I learned long ago with regards to rust particulars getting into tank from some gas stations, and not wanting to pull out tank or replace, even when it is plastic, rust still can get into tank as I found, so I put super strong magnet on tank strap and no more issues in past three months. So the rust particulars are now staying out of filter, worth a try, sure was easier than dropping tank to clean out.
As crazy as it sounds, must of been dirty fuel again as filter was clogged again. I get gas at same place almost all the time, so I thought these gas stations had filters on pumps? A trick I learned long ago with regards to rust particulars getting into tank from some gas stations, and not wanting to pull out tank or replace, even when it is plastic, rust still can get into tank as I found, so I put super strong magnet on tank strap and no more issues in past three months. So the rust particulars are now staying out of filter, worth a try, sure was easier than dropping tank to clean out.
-
- Similar Topics
- Replies
- Views
- Last post