MASSIVE Engine Vibration When Idling.
Posted: Sat Jul 23, 2016 4:43 pm
Hi guys,
Anyone ever come across an engine that vibrates violently when idling and then worse again when just a little throttle is engaged (Anything past around 1100 Revs seems fine). I have a 2001 2.0 Hdi 90. 143,000 miles.
My knowledge of cars is incredibly limited but been trying to rule out any obvious causes. I'd read that some injectors may not be firing properly at low revs, but I wacked a screwdriver on each injector base and put my ear to it... All seem to be firing consistently, and checked the impedance across the contacts which are all holding steady at 1 Ohm. (I'm assuming that's the correct impedance, they're all the same!)
I've also had a look at the stay bar which seems to fine.
My next, and seemingly most obvious thought is worn engine mounts. I can see the bushing on the passenger side, above the gearbox, moving like jelly and a little of the same on the lower-rear engine "dog bone" mount. I wasn't sure whether this was happening because the bushings are compensating for a deeper problem, or if they are the problem. I've felt them and visual inspected them but I don't know exactly how solid one of these bushings is supposed to feel. From what I've been reading, engines with dead mounts tend to shudder and clunk specifically on starts, stops and gear changes? Mine isn't doing any of this, even going from "full wobble" to higher revs the engine just seems to settle with a gentle transition rather than wrenching itself around the engine bay.
Is there anything else it could be? I just need to track down the problem for definite, made so many misdiagnosed repairs to my previous car which cost a fortune and it still died of "unknown causes"... Rather avoid that again.
Seen a lot of forum posts (everywhere) where barely any details are posted so I've tried to be as thorough as possible. Any help would be greatly appreciated.
Cheersen!
Anyone ever come across an engine that vibrates violently when idling and then worse again when just a little throttle is engaged (Anything past around 1100 Revs seems fine). I have a 2001 2.0 Hdi 90. 143,000 miles.
My knowledge of cars is incredibly limited but been trying to rule out any obvious causes. I'd read that some injectors may not be firing properly at low revs, but I wacked a screwdriver on each injector base and put my ear to it... All seem to be firing consistently, and checked the impedance across the contacts which are all holding steady at 1 Ohm. (I'm assuming that's the correct impedance, they're all the same!)
I've also had a look at the stay bar which seems to fine.
My next, and seemingly most obvious thought is worn engine mounts. I can see the bushing on the passenger side, above the gearbox, moving like jelly and a little of the same on the lower-rear engine "dog bone" mount. I wasn't sure whether this was happening because the bushings are compensating for a deeper problem, or if they are the problem. I've felt them and visual inspected them but I don't know exactly how solid one of these bushings is supposed to feel. From what I've been reading, engines with dead mounts tend to shudder and clunk specifically on starts, stops and gear changes? Mine isn't doing any of this, even going from "full wobble" to higher revs the engine just seems to settle with a gentle transition rather than wrenching itself around the engine bay.
Is there anything else it could be? I just need to track down the problem for definite, made so many misdiagnosed repairs to my previous car which cost a fortune and it still died of "unknown causes"... Rather avoid that again.
Seen a lot of forum posts (everywhere) where barely any details are posted so I've tried to be as thorough as possible. Any help would be greatly appreciated.
Cheersen!