Tom R
Active Member
Just had my 2003 XLT with 160,000 miles serviced and now have some idle and noise issues.
First off, what was done...
Brand New Platinum Spark Plugs, - Brand New Motorcraft Spark Plug Wires, - Oil change with Semi-Synthetic Oil (First time using a different brand than the one I always use, can't remember the brand, Castrol I believe and I always used Kendell GT1 Semi-Synthetic blend) and New oil filter, - Replaced Transmission Filter and pan gasket, - Changed Transmission fluid but didn't do the flush, - Replaced Front shocks with the Rancho 9000S again, - Installed New front sway bar links and bushings, - Front wheel bearings lubed, inspected and adjusted, - Installed New Fuel Filter, - Fuel induction and throttle body cleaning, Alignment Check and Tire rotation.
1st issue is at idle the engine kinda burbles or stumbles, it gets worse when stopped in traffic or at a stoplight. The rpm's drop to around 5-600rpms, then fluctuate up and down between there and about 1,000rpms. The longer it is stopped, the more it stays down around the 500rpm mark. When letting off the brake to start to drive forward, it usually stumbles, sometimes enough where I think the engine is going to stall, then it drives and accelerates without any hesitation or stumbles. The idle issue isn't real apparent when the engine is cold, but as it comes up to operating temperature it gets worse.
2nd issue is something that has appeared since I picked my ST up and I never noticed before is that there is now a clickity-click rattle sound when accelerating, almost as if the engine sounds like it has bad gas and is detonating, but that is definitely not what it is doing. If driving as a normal person would without "getting on it", the sound diminishes after getting up to speed. Now if you drive it like you have a lead foot, the sound is noticeably there when you put the engine under a load.
We have rechecked all plugs and wire connections, all intake air path and electrical connectors. All is ok and doesn't change the issues.
Help! Thoughts, ideas?
Thanks!
First off, what was done...
Brand New Platinum Spark Plugs, - Brand New Motorcraft Spark Plug Wires, - Oil change with Semi-Synthetic Oil (First time using a different brand than the one I always use, can't remember the brand, Castrol I believe and I always used Kendell GT1 Semi-Synthetic blend) and New oil filter, - Replaced Transmission Filter and pan gasket, - Changed Transmission fluid but didn't do the flush, - Replaced Front shocks with the Rancho 9000S again, - Installed New front sway bar links and bushings, - Front wheel bearings lubed, inspected and adjusted, - Installed New Fuel Filter, - Fuel induction and throttle body cleaning, Alignment Check and Tire rotation.
1st issue is at idle the engine kinda burbles or stumbles, it gets worse when stopped in traffic or at a stoplight. The rpm's drop to around 5-600rpms, then fluctuate up and down between there and about 1,000rpms. The longer it is stopped, the more it stays down around the 500rpm mark. When letting off the brake to start to drive forward, it usually stumbles, sometimes enough where I think the engine is going to stall, then it drives and accelerates without any hesitation or stumbles. The idle issue isn't real apparent when the engine is cold, but as it comes up to operating temperature it gets worse.
2nd issue is something that has appeared since I picked my ST up and I never noticed before is that there is now a clickity-click rattle sound when accelerating, almost as if the engine sounds like it has bad gas and is detonating, but that is definitely not what it is doing. If driving as a normal person would without "getting on it", the sound diminishes after getting up to speed. Now if you drive it like you have a lead foot, the sound is noticeably there when you put the engine under a load.
We have rechecked all plugs and wire connections, all intake air path and electrical connectors. All is ok and doesn't change the issues.
Help! Thoughts, ideas?
Thanks!