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Weird vibration issue in 30c+ heat


Rochefort

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  • Member For: 11y 15d

Hi All,

 

Hoping one of you guys have come across this issue :D

 

My BF2 XR6T Auto Ute seems to have developed an issue that only seems to manifest in 30c+ heat.

 

It started Monday. Drove from home to Star Track in Dandenong, about 20min.. All fine... Temperature went up a little bit, hopped in the car after it was parked in the sun.. Starts no worries, idles fine. Out of nowhere it starts vibrating through the chassis, could feel it through the steering wheel. Cant remember if the thermo fan kicked in straight away... Once I got moving it pretty much stopped vibrating unless I stopped at lights for a bit.

 

Totally forgot about it Tuesday, but the weather way much cooler, might have been 26ish when I drove home.. No dramas, no issues.

 

This morning nice and cool, no issues. Drove to the station sweet as.

 

Get off the train just before 4pm.. Its stinking hot, round 35... Car starts up fine, drive it out of the car park then the thermo fan kicks in. and the vibrations start again. NFI why the thermo is kickiing in when the temp guage isnt even past the first 1/4 from cold... Usually it doesnt kick in till half way. Really odd. Same sorta thing as Monday. When stopped or idle, a process kicks in.. not sure what it is starts to vibrate.. if the thermo fans kick in, it vibrates harder. Only seems to do it when stopped at the lights/idling.

 

So end up going to the pub, after the pub was driving a mate home and paying more attention since we were discussing the issue.. the car was still warmish, below 1/4 mark.. Paying more attention as I was talking to him about it... It was like the autochoke or something kicks in before the vibrations start.. The revs went up slightly. The car isnt cold... and if the thermos kicks boom vibrations get worse.. when moving it seems fine... Temp droped to under 30 when we were standing out the front yacking... Had it idling... no dramas... no thermos kicking in. Drove home and it was fine, was around 26/27c.

 

I tried turning the aircon off, made no difference to the vibrations when it happened. I thought maybe it was power related because of the thermos.. but headlights didnt set it off. Seems its getting confused about the hot air coming in maybe and messing with the idle/fuel mixture or something? It does it in Park/neutral, or in drive and reverse. Moving or stationary. I got no idea. Acceleration seems fine, no loss of power that I noticed.

 

Will be interesting to see if it does it again on the drive to work tomorrow or not. 37c forecast tomorrow so I'm expecting it to play up on the drive home :S

 

Anyone had something similar? Hoping its something easy and cheap to fix.. Hasn't been a cheap few months :S

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  • Member For: 11y 9m 29d
  • Gender: Male
  • Location: Frankston, 3199

Was no rhyme nor reason when it was happening and was too intermittent to be an easy diagnosis.

 

Was at Ford under warranty a few times and nothing found.

 

Eventually happened while the tuner was in the car and he was able to work it out.

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Its def the thermo's.... Was carrying on when  I got home, turned car off.. Unplugged em... Vibration gone... Plug back in, fans fire up... vibration city.

 

Now to pull em out and see if its a mount or if a fans knackered.. Testing that could be interesting.

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  • Moderating Team
  • Member For: 11y 9m 29d
  • Gender: Male
  • Location: Frankston, 3199

Awesome - lucky it's a hot day :)

 

Was a good couple of months of me trying to figure out what the issue was before striking it lucky.

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