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Shayzer LifeTime Member
Age: 53 Zodiac: Joined: 20 Oct 2013 Posts: 3 Location: Tullamore
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Posted: Tue Jul 29, 2014 8:59 Post subject: Strange revs |
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Morning all ! Need a little help !
I got a 94 2.8 auto diesel . Starts first turn of the key every time . Little or no smoke and purrs like a kitten. Problem starts when traveling a a steady speed . Traveling at say km100 , she will go fine and then the revs jump by 200 rpm . Does this on and off for most of the journey and then will drive fine ????? Anybody got some ideas ? Is it a gearbox or fuel problem ? |
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Posted: Tue Jul 29, 2014 8:59 Post subject: Google Ads keep the POCUK free to join! |
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jimmybond *******
Age: 43 Zodiac: Joined: 05 May 2009 Posts: 4170 Location: bury st edmunds
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Posted: Tue Jul 29, 2014 9:08 Post subject: |
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Sounds like over drive turning on and off.
theres a temp sensor on head that causes this.
if not od then check your atf level, ie whilst its running. |
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Shayzer LifeTime Member
Age: 53 Zodiac: Joined: 20 Oct 2013 Posts: 3 Location: Tullamore
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Posted: Tue Jul 29, 2014 10:39 Post subject: |
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I'll have a look ! Eh ! What's the temp sensor look like |
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kenthepipe LifeTime Member
Joined: 11 Mar 2005 Posts: 4366 Location: North-East
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Mark3 LifeTime Member
Age: 61 Zodiac: Joined: 13 Feb 2009 Posts: 4016 Location: Rainham Village, Essex.
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Posted: Tue Jul 29, 2014 15:14 Post subject: |
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Over drive turning off will most prolly raise the RPM by a whole lot more than 200, first place to start is to check fuel lines at rear of vehicle see if they corroded and letting in air. |
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v8 rick LifeTime Member
Age: 68 Zodiac: Joined: 15 Apr 2009 Posts: 5707 Location: bolton lancs
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Posted: Tue Jul 29, 2014 15:20 Post subject: |
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Mark3 wrote: |
Over drive turning off will most prolly raise the RPM by a whole lot more than 200, first place to start is to check fuel lines at rear of vehicle see if they corroded and letting in air. |
your right mark it`ll only change by 200 rpm if it drops out of lockup if , it drops out of overdrive it`ll increase by 1000 rpm approx .
rick. |
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Shayzer LifeTime Member
Age: 53 Zodiac: Joined: 20 Oct 2013 Posts: 3 Location: Tullamore
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Posted: Tue Jul 29, 2014 16:30 Post subject: |
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Thanks lads . I'll get it checked out |
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jimmybond *******
Age: 43 Zodiac: Joined: 05 May 2009 Posts: 4170 Location: bury st edmunds
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Posted: Thu Jul 31, 2014 8:55 Post subject: |
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That is intresting what you 2 say about overdrive.
I didnt think mine was that much rpm lost with od off.
to be honest I never touch it.
I know when I get to 65mph my revs drop a tad and I get a large surge of power that you dont need.
not often I drive much past 70.
I thought that was my over drive.
When towing I try to sit at 65 depending on size c of trailer.
I dont go no more than that as I know whats coming next.
I know normal 2.8 (non edc) seems alot lower ratios and over drive seems alot lower speed. |
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