S1 V6 auto back on the road at last!! - Problem solved!!

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MTXM
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Re: S1 V6 auto back on the road at last!! - fourth time luck

Post by MTXM » Sun Feb 19, 2017 9:20 pm

Many thanks for that Mike and I will try disconnecting the throttle sensor on another car and report back. With regards, Matthew T.
1989 V6 Exclusive (Poland car) - Now living in a local Motor Museum!
1990 V6sei auto (grey auto)
1990 V6sei manual (gold car)
1990 V6.24 Pallas (Germany car)
1990 V6.24v (Scotland car)
Other previous XM sold and broken too many to mention!

xmexclusive
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Re: S1 V6 auto back on the road at last!! - fourth time luck

Post by xmexclusive » Sun Feb 19, 2017 9:50 pm

Hi Matthew

Have you checked the voltage output from the throttle position sensor.
The ECU only accepts the signal sent and sends the equivalent injected fuel.
No checks on the validity of the signal level and no EML because the ECU is happy.
So say that signal peaks at 2 volts instead of the 5 volts it should reach it will act like a limiter.
The V6 guide I posted leaves the TPS checks blank.
I only picked up on this by reading through the equivalent V6-24v document which list voltage tests.
Closed should read 0.1 to 0.5 volts, fully open 4.5 to 5.0 volts.
I think your idea of direct wiring the TPS signal has considerable merit.

John

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MTXM
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Re: S1 V6 auto back on the road at last!! - fourth time luck

Post by MTXM » Sun Feb 19, 2017 10:24 pm

Thanks for your comments John and I will check the throttle sensor output before I try the replacement wiring. I know that the sensor itself is good as it was taken from a working car, so if the problem is from this location then it has to be the wiring really. Although not mentioned before, I did replace some crimped connections in the throttle sensor wiring to the harness adjacent that looked a bit dodgey with soldered joints that unfortunately brought no change, but there may be others elsewhere! With regards, Matthew T.
1989 V6 Exclusive (Poland car) - Now living in a local Motor Museum!
1990 V6sei auto (grey auto)
1990 V6sei manual (gold car)
1990 V6.24 Pallas (Germany car)
1990 V6.24v (Scotland car)
Other previous XM sold and broken too many to mention!

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MTXM
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Re: S1 V6 auto back on the road at last!! - fourth time luck

Post by MTXM » Tue Feb 21, 2017 10:21 am

I can now report that partly thanks to assistance from Dave I think I have found the problem with the engine and should know definitively later today. Does anyone want to guess the issue and as a clue neither a lack of fuel or electrical glitches are involved! Regards, Matthew T.
1989 V6 Exclusive (Poland car) - Now living in a local Motor Museum!
1990 V6sei auto (grey auto)
1990 V6sei manual (gold car)
1990 V6.24 Pallas (Germany car)
1990 V6.24v (Scotland car)
Other previous XM sold and broken too many to mention!

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White Exec
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Re: S1 V6 auto back on the road at last!! - fourth time luck

Post by White Exec » Tue Feb 21, 2017 10:40 am

Hmmm... :?
Chris
1996 XM 2.5TD Exclusive RP7165 Polar White
1992 BX19D Millesime RP5800 Sable
1989 BX19RD Delage Red Deceased; 1998 ZX 1.9D Avantage auto Triton Green Company car 1998..2001; 2001 Xantia 1.8i auto Wicked Red Company car 2001..2003

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Dean
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Re: S1 V6 auto back on the road at last!! - fourth time luck

Post by Dean » Tue Feb 21, 2017 11:12 am

ooh the suspense!
glad you sorted it Matthew!

D
92 Citroen XM Prestige 3.0i Auto R.P5678
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Re: S1 V6 auto back on the road at last!! - fourth time luck

Post by russ92xmsed » Tue Feb 21, 2017 1:27 pm

Ahhh. Torture!
Russ

1992 K reg XM 2.1 Auto SED RP 5712
1992 K reg XM 2.1 Auto SED RP 5705 (D)
Also
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http://www.rjwcreativedesign.co.uk

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Dean
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Re: S1 V6 auto back on the road at last!! - fourth time luck

Post by Dean » Tue Feb 21, 2017 2:45 pm

I think over the full length of this saga there has been a stab at every component of that car from the fuses to the nut holding the steering wheel, I think the only thing that's not been guessed at is the transmission and the chassis!

D
92 Citroen XM Prestige 3.0i Auto R.P5678
14 Mitsubishi L200 Trojan
89 Talbot Express 2.0 coach built Auto-trail Chinook

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Re: S1 V6 auto back on the road at last!! - fourth time luck

Post by sdelasal » Tue Feb 21, 2017 3:18 pm

Furry animals & nests in the air filter....

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Re: S1 V6 auto back on the road at last!! - fourth time luck

Post by cxprestigeauto » Tue Feb 21, 2017 4:15 pm

Mat stuck under the accelerator pedal.........
1991 XM 2.0 Si auto RP 4903 (12 April 1990) Alpine White
2019 Suzuki Vitara AllGrip SZ5 Automatic 1.4 BoosterJet. White
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