Pinknoise
Veteran Member
Hi,
I've posted many times for help with slow down shudder. (Thanks to eveyone who has helped soo far). So far I have not been able to fix my shudder by adjusting the IQ, even a setting of 9 didn't fix it. I did however notice that the engine would shudder when at idle RPM and the wheels were turning, in gear or out. As a test I jacked the front of the car up, started it in neutral and spun the front wheels by hand. Sure enough the engine started to judder, with the bonet up it was actually quite a violent shake like a misfire. I also discovered the problem also occured in gear as long as the revs were about idle. Obviously with the wheels off the ground the car was happy to sit in first or second at idle. I tried disconnecting the drive shafts and abs sensors to no avail. When I finally found the road speed sensor and disconnected it, the shudder went away. As a test I reconnected it with the engine running and in first gear (still jacked up) and within a second of plugging it in the shudder came back. I tried much newer road speed sensor from a scrappy but this didn't solve it. I've ordered a second hand ecu from ebay but it hasn't arrived yet.
Has anyone seen this problem before, or even guess at what might be wrong?
Thanks
Sam
I've posted many times for help with slow down shudder. (Thanks to eveyone who has helped soo far). So far I have not been able to fix my shudder by adjusting the IQ, even a setting of 9 didn't fix it. I did however notice that the engine would shudder when at idle RPM and the wheels were turning, in gear or out. As a test I jacked the front of the car up, started it in neutral and spun the front wheels by hand. Sure enough the engine started to judder, with the bonet up it was actually quite a violent shake like a misfire. I also discovered the problem also occured in gear as long as the revs were about idle. Obviously with the wheels off the ground the car was happy to sit in first or second at idle. I tried disconnecting the drive shafts and abs sensors to no avail. When I finally found the road speed sensor and disconnected it, the shudder went away. As a test I reconnected it with the engine running and in first gear (still jacked up) and within a second of plugging it in the shudder came back. I tried much newer road speed sensor from a scrappy but this didn't solve it. I've ordered a second hand ecu from ebay but it hasn't arrived yet.
Has anyone seen this problem before, or even guess at what might be wrong?
Thanks
Sam