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Topic: Varying idle speed, load value over 90% (OBD) (Read 1138 times) |
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runsun
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I love YaBB 1G - SP1!
 
Posts: 26
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Varying idle speed, load value over 90% (OBD)
« on: Jul 16th, 2011, 6:32pm » |
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Hi !
-96 DOCH 2.0-16V Aut.
Suddenly starting the engine to varying at idle speed between 1000-2000rpm, it only happen when I start engine and the car are not moving.
After a while are the engine running normally.
I have checked with my OBD tools and no Fault Codes are detected, however the calculated load value increase from normally 20% at idle to over 90% when this error occur (large amount of black smoke coming out of the exhaust) 
Any tip - where to start !
Reg. Rune, Norway 
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PJDavis
Senior Member
2 x 1995 Jag X300 3.2 / 4.0 (Henley) 1957 XK140
Posts: 1474
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Re: Varying idle speed, load value over 90% (OBD)
« Reply #1 on: Jul 16th, 2011, 9:26pm » |
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Clean the MAF Sensor.
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I love 'Movvy'
1995 Jaguar XJ6 X300 3.2 (Henley)
1995 Jaguar XJ6 X330 4.0 (Dopey)
1957 Jaguar XK140 USA (converted to RHD, and to have fitted Mk10 420G Engine with BW 65 Auto Trans)
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Mike H
Senior Member
Renault Clio
Posts: 2594
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Re: Varying idle speed, load value over 90% (OBD)
« Reply #2 on: Jul 17th, 2011, 12:38pm » |
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Simple test, unplug the MAF then see if it behaves more normally.
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Mike H
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runsun
Newbie
I love YaBB 1G - SP1!
Posts: 26
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Re: Varying idle speed, load value over 90% (OBD)
« Reply #3 on: Sep 22nd, 2011, 1:42pm » |
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Yes, finally I have found the fault after hours with annoyingness......  ;D
Faulty wiring from the TPS (throttle position sensor) was the problem, but the defect wiring only happen occasional, mostly when starting the car......
New wiring from TPS to port 89 and 90 at the PCM and the problem was solved.
This is the second time with faulty wiring, first time it was the VSS (speed sensor) who troubled.
I had't found the fault without the OBD tools that I bought from China for below $25 incl. shipping. 
http://www.dealextreme.com/p/elm327-usb-vehicle-obd-2-scanner-tool-28528
reg. Rune S. - Norway
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Mike H
Senior Member
Renault Clio
Posts: 2594
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Re: Varying idle speed, load value over 90% (OBD)
« Reply #4 on: Sep 22nd, 2011, 4:37pm » |
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Super! 
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Mike H
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