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Author Topic: Loss of power  (Read 3661 times)

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Sazzaa

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Loss of power
« on: 20 January 2012, 20:35:03 »
Omega 2.5 CD V6 (2000) kept seeming like it was going to cut out while driving/breaking and at the same time has lost power accelerating, doesn't want to go above 3000 rpm....  So I got the idling problem seen to (dodgy valve) but the acceleration is still gash.  Garage have done a full service (it was overdue) and told me there could be a few things wrong with it, possibly serious, but to drive it a couple hundred miles and see if anything obvious crops up...  Any ideas?

I'm female, and not mechanical, so be gentle with the tech speak please :)
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freecall666

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Re: Loss of power
« Reply #1 on: 20 January 2012, 20:40:26 »
Hi is the spanner light on on the dash, may have a sensor gone, so would need to read the codes stored, look at paper clip in maintenance guide. should help you.
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Sazzaa

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Re: Loss of power
« Reply #2 on: 20 January 2012, 20:42:16 »
There are no lights coming up on the dash at all...
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freecall666

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Re: Loss of power
« Reply #3 on: 20 January 2012, 20:54:19 »
Quote from: Sazzaa on 20 January 2012, 20:42:16
There are no lights coming up on the dash at all...
still do the paper clip it shows you how to doit see if any codes come up.
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Sazzaa

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Re: Loss of power
« Reply #4 on: 20 January 2012, 20:56:24 »
Ok, will try this in the morning
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freecall666

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Re: Loss of power
« Reply #5 on: 20 January 2012, 21:02:42 »
Quote from: Sazzaa on 20 January 2012, 20:56:24
Ok, will try this in the morning
can go from there to find fault..
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Entwood

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Re: Loss of power
« Reply #6 on: 20 January 2012, 21:04:04 »
When you switch the ignition on, without starting the engine ... do the "spanner" light and the one that looks like an engine, both come on and then go out ???

If not, possibly someone has removed the bulb to mask a fault ... not an unheard of practice .. :(
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RobG

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Re: Loss of power
« Reply #7 on: 20 January 2012, 21:06:13 »
Quote from: Entwood on 20 January 2012, 21:04:04
When you switch the ignition on, without starting the engine ... do the "spanner" light and the one that looks like an engine, both come on and then go out ???

If not, possibly someone has removed the bulb to mask a fault ... not an unheard of practice .. :(
Not on a 2.5 Nige ;)
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Entwood

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Re: Loss of power
« Reply #8 on: 20 January 2012, 21:47:38 »
Quote from: RobG on 20 January 2012, 21:06:13
Quote from: Entwood on 20 January 2012, 21:04:04
When you switch the ignition on, without starting the engine ... do the "spanner" light and the one that looks like an engine, both come on and then go out ???

If not, possibly someone has removed the bulb to mask a fault ... not an unheard of practice .. :(
Not on a 2.5 Nige ;)

OK .. long time since I owned a 2.5 ... but the principle is right .. do the warning lights work as designed .. :)
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Sazzaa

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Re: Loss of power
« Reply #9 on: 20 January 2012, 22:34:40 »
Ok, done the paperclip test.....  Comes up with 73 and 31.  So thats Mass Airflow Sensor Voltage Low and No Engine RPM Signal, right? 
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freecall666

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Re: Loss of power
« Reply #10 on: 20 January 2012, 22:57:05 »
Quote from: Sazzaa on 20 January 2012, 22:34:40
Ok, done the paperclip test.....  Comes up with 73 and 31.  So thats Mass Airflow Sensor Voltage Low and No Engine RPM Signal, right?
no signal is cos engine not running, mass airflow sensor is on the air intake black round bit with square top check the plug is clean. inside and outter.if is do test again without it pluged in.
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Webby the Bear

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Re: Loss of power
« Reply #11 on: 21 January 2012, 00:16:10 »
Sazzaa, hello and welcome.

First of all, sack your mechanic. ''Run it for 200 miles and see what happens''??? WTF?

I am no mechanic, but a loss of power and acceleration... misfire perhaps???

If I were you I'd enlist the services of one of the legends on here to diagnose and repair!

Just my opinion! :)
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albitz

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Re: Loss of power
« Reply #12 on: 21 January 2012, 00:30:58 »
If the mass airflow sensor is suspected, unplug the electrical connector and see if the car runs better.It will go to a default setting when disconnected,and not be as pokey as it should be,but run reasonably ok. If it runs better with it unplugged you need to replace it.
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Sazzaa

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Re: Loss of power
« Reply #13 on: 21 January 2012, 09:15:45 »
Quote from: Webby the Bear on 21 January 2012, 00:16:10
Sazzaa, hello and welcome.

First of all, sack your mechanic. ''Run it for 200 miles and see what happens''??? WTF?

I am no mechanic, but a loss of power and acceleration... misfire perhaps???

If I were you I'd enlist the services of one of the legends on here to diagnose and repair!

Just my opinion! :)

Ha, I can't blame the mechanic fully, I think he was trying to save me paying a huge bill all at once!  (I'd mentioned I didn't have more than a couple hundred to spare at the moment and am heading on holiday in 2 weeks...)
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omega3000

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Re: Loss of power
« Reply #14 on: 21 January 2012, 10:33:50 »
Quote
drive it a couple hundred miles and see if anything obvious crops up...
Missed that bit  :-X
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