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voxace
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Age:23
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 Posted: Tue Feb 22, 2005 8:07 pm Post subject: Testing Sensors |
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Hey,
Was testing all my sensors today in the never ending hunt for the cure for my fuel consumption issues and all the sensors checked out OK except the MAP reading was about 10Khz too high at idle, with AC on, and revving etc. With engine off and ignition on it was right though.
Would this just be from the cam???
Also TPS read fine at closed throttle (I think about 3000ohms), but at WOT it was 600ohms instead of 500. Does this mean it needs adjusting or is it close enough?
Anyone muster any other ideas as to why I'm only getting like 420km highway driving, and you don't want to know what I get round town...LOL?
Does the power steering pressure switch need to be plugged in, as this is the one thing that is rooted. I leave it unplugged as it causes a bad idle when in. Could that effect fuel economy in any way???
Cheers. |
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voxace
Technical Contributor
Age:23
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Location: Ivanhoe NSW, Australia
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| Posted: Wed Feb 23, 2005 6:54 pm Post subject: |
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Oh and I just went and did a diagnostic.
KOEO results in 52 - Power Steering Switch (der!)
KOER test results in 12/13 ISC, 42 Oxy Sensor (Running Rich) and 52 Power Steering Switch Again.
Anyway, anyone know if the power steering switch could effect economy, and why the oxy sensor is reading rich (its only new too BTW)?
Cheers. |
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Nanger
Fordmods Stock as a Rock
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| Posted: Wed Feb 23, 2005 7:48 pm Post subject: |
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You could try swapping the MAP sensor for a known good one, i.e. off a mates car. See if that makes any difference. (probably not)
Might even be worth your while checking fuel pressure. Could be the pressure regulator sticky, I've seen that.
Does the car still have plenty of power, or is it down on power? |
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fordgt290
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| Posted: Wed Feb 23, 2005 7:56 pm Post subject: |
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well if ur car is storing a fault for o2 sensor and beeing rich then it means that the ecu is trying to lean the mixture out as much as it can but still cant get it to its correct value so it stores the fault. which would make ur car use a lot of fuel
so it could be a faulty sensor though proberly not, sounds like there is air leak in ur intake system, as u were saying it wasnt idling to well either.
use some flamble spary like easy start around the places there could be a air leak eg intake manifold gaskets, throttle body, crank case valve ect and if the car idels up when u spray it then u have found ur leak |
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voxace
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| Posted: Wed Feb 23, 2005 8:24 pm Post subject: |
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Cheers dude I think I will actually try that (replace gaskets).
That would throw thre MAP sensor readings out too if there was a vacuum leak hey? Interesting...
Like the car still goes good, just really bad on fuel - spits out black s**t in the mornings and black smoke when you floor it. |
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fordgt290
Fordmods - Getting Side Ways
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| Posted: Wed Feb 23, 2005 8:29 pm Post subject: |
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| well dont just go replacing them find out if they are leaking first |
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voxace
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| Posted: Wed Feb 23, 2005 8:47 pm Post subject: |
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I just thought it would be worthwhile since its only a few dollars for an intake gasket kit anyway...  |
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justfordima
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| Posted: Wed Feb 23, 2005 8:54 pm Post subject: |
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I hear the power steering pressure switch does affect fuel economy.. as much as it bedazzled me.. someone told me (when I was hacing the same issues) to change that, or check it... should change it anyway, if its rooted.
Cheers |
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voxace
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| Posted: Wed Feb 23, 2005 9:02 pm Post subject: |
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| They worth much $, hard to change? |
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justfordima
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| Posted: Wed Feb 23, 2005 9:04 pm Post subject: |
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lol, never changed it. Can't be that much.. still gotta test all my sensors.
Cheers |
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Benji
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| Posted: Thu Feb 24, 2005 7:55 am Post subject: |
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| Powersteering Switch cost me $40 from repco. |
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comhelp
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| Posted: Thu Feb 24, 2005 12:01 pm Post subject: |
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I guess it is an auto yeah?
have u tried resseting the throttle and also the computer?
to give u an idea of how much i get is, on the weekend i travelled around 550kms in 2 days and only used 1/3 of a tank
it is a stock engine with K&N filter, 2.5" catback and manual 
oh and btw my oxy sensor and camshaft postion sensors are gone  |
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Nanger
Fordmods Stock as a Rock
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| Posted: Thu Feb 24, 2005 12:09 pm Post subject: |
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| comhelp wrote: | to give u an idea of how much i get is, on the weekend i travelled around 550kms in 2 days and only used 1/3 of a tank
it is a stock engine with K&N filter, 2.5" catback and manual
oh and btw my oxy sensor and camshaft postion sensors are gone |
I think that would have to be some kind of record, 3 X 550km = 1650km from a tank. That works out to be about 4.2 litres per 100 kilometers. Who needs a Toyota Prius with these figures. Either that or your fuel guage is inaccurate. |
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comhelp
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| Posted: Thu Feb 24, 2005 12:15 pm Post subject: |
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nope fuel guage was perfect as i filled it up from full and only put in 20L worth of fuel. I couldn't believe it
mind ya that was highway travel and around city travel including 100kms in peak hour traffic (melbourne's peak hour traffic that is) as well as a little bit of spirited driving  in around 1/4 of a tank it has done 265kms |
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voxace
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| Posted: Thu Feb 24, 2005 5:03 pm Post subject: |
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Did 200km today combined city/hwy and averaged 15.5.
Car used to be good on fuel, getting around 600-700 per tank.
What I will do is put the new power steering sensor in, and new intake manifold, throttle body and ISC gaskets on. Plus the manual gearbox I have is going in this weekend or the weekend after (yeah gettin a little ahead of myself in the sig....lol can't wait). |
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comhelp
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| Posted: Thu Feb 24, 2005 7:36 pm Post subject: |
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well i actually stopped by my mates new workshop and he ran some tests with his new machine he has. No faults out of the ordinary showed up  mmmmmmm
did some more tests and guess what......... valve burnt out in No.3 cyclinder |
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fordgt290
Fordmods - Getting Side Ways
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| Posted: Thu Feb 24, 2005 7:41 pm Post subject: |
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| if ur cars cam sensor and o2 sensor were rooted u would not get any where near that amount on a tank, the car would be running rich causing it to use more fuel and with the cam sensor gone it would not be running in sequential injection so, then that will also effect ur econemy and preformance |
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comhelp
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| Posted: Thu Feb 24, 2005 7:44 pm Post subject: |
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| yeah well we found out that cause the valve was burnt out and hence not getting enough compression (85) that is what was causing the wrong reading and which is why the oxy sensor was picking up that it was faulty as there was unburnt fuel travelling through it |
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