Hi. I recently made a post about this issue but im creating another as the issue has changed. Anyways, heres exactly whats happened. (If you can, PLEASE help. We've been pulling hair out for months over this).
So when we bought the car, the check engine light was on, but we didn't have any issues. Drove just fine. Then we started notcing the throttle response was slightly delayed. Give it gas? It'd take about a second to take it. The code it through was for the MAF sensor (P0101). We changed the MAF sensor and still had the same issue. Just kinda forgot about it and the CEL was still on.
Then the car started stalling whenever coming to a stop. WE cleaned the throttle body, changed all spark plugs, changed the Fuel Rail Pressure (FPS) sensor, changed the gaskets around the cylinders, changed the PCV vacuum line, and even replaced the MAP sensor in the manifold. The issue persisted, and we couldn't find any vacuum leaks ourselves. Then we started notcing another code, along with the P0101. The code was P0172 (System too rich).
Then we bought a brand new, genuine volvo MAF sensor (keep in mind EVERY part we've put into the car has been a genuine volvo). The issue persisted.
We took it in last week to an independent Volvo repair shop (http://www.nordicmotorsrepair.com). They found a vacuum leak, sealed it, but it didn't fix the issue. Now the P0172 code is gone, but we still have P0101. This didnt fix it, so then we tried ourselves resetting the computer (ECU). The issue got better- it stopped stalling. The throttle response is still delayed, but the idle is much better. Now when coming to a stop, it comes close to stalling, but the engine revs itself back up and recovers. Now, when driving on the highway, letting off the accelerator causes the car to coast, and the RPMs stay up at a high level, wherever they were when letting off the pedla. (like its supposed to). Before, the RPMs would drop to idle, and even almost stall on the highway.
They called us back after doing research and told us to bring it in today (which we did). They connected our car with another S40 to the VIDA system and compared ALL the data. They still couldn't find any issue. They said they could start throwing parts in but itd be between 1000-2000$!!
Any ideas? This is the non-turbo. If anyone can help at all or has any ideas please let us know! Any help would be much appreciated!!!
So when we bought the car, the check engine light was on, but we didn't have any issues. Drove just fine. Then we started notcing the throttle response was slightly delayed. Give it gas? It'd take about a second to take it. The code it through was for the MAF sensor (P0101). We changed the MAF sensor and still had the same issue. Just kinda forgot about it and the CEL was still on.
Then the car started stalling whenever coming to a stop. WE cleaned the throttle body, changed all spark plugs, changed the Fuel Rail Pressure (FPS) sensor, changed the gaskets around the cylinders, changed the PCV vacuum line, and even replaced the MAP sensor in the manifold. The issue persisted, and we couldn't find any vacuum leaks ourselves. Then we started notcing another code, along with the P0101. The code was P0172 (System too rich).
Then we bought a brand new, genuine volvo MAF sensor (keep in mind EVERY part we've put into the car has been a genuine volvo). The issue persisted.
We took it in last week to an independent Volvo repair shop (http://www.nordicmotorsrepair.com). They found a vacuum leak, sealed it, but it didn't fix the issue. Now the P0172 code is gone, but we still have P0101. This didnt fix it, so then we tried ourselves resetting the computer (ECU). The issue got better- it stopped stalling. The throttle response is still delayed, but the idle is much better. Now when coming to a stop, it comes close to stalling, but the engine revs itself back up and recovers. Now, when driving on the highway, letting off the accelerator causes the car to coast, and the RPMs stay up at a high level, wherever they were when letting off the pedla. (like its supposed to). Before, the RPMs would drop to idle, and even almost stall on the highway.
They called us back after doing research and told us to bring it in today (which we did). They connected our car with another S40 to the VIDA system and compared ALL the data. They still couldn't find any issue. They said they could start throwing parts in but itd be between 1000-2000$!!
Any ideas? This is the non-turbo. If anyone can help at all or has any ideas please let us know! Any help would be much appreciated!!!
