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Author Topic: Erratic 2.2  (Read 21163 times)

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Nick W

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Re: Erratic 2.2
« Reply #30 on: 24 January 2023, 16:07:43 »
Now it's time to measure the fuel pressure so you're not guessing. Changing the fuel filter only ever gives you the nice warm feeling of spending some money. A faulty, or failing, pump is more likely. The relay could also be part of the problem
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Doctor Gollum

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Re: Erratic 2.2
« Reply #31 on: 24 January 2023, 16:44:57 »
Not to mention the fuel pressure regulator.
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Nick W

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Re: Erratic 2.2
« Reply #32 on: 24 January 2023, 17:12:44 »
Quote from: Doctor Gollum on 24 January 2023, 16:44:57
Not to mention the fuel pressure regulator.


That's another favourite for the I don't know what it's for, or how it does it so it must be faulty school of diagnosis.
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Doctor Gollum

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Re: Erratic 2.2
« Reply #33 on: 24 January 2023, 17:23:44 »
Well, it's job is to regulate fuel pressure. The best pump in the world won't hold pressure against an open pipe ::)

But whilst we're remotely playing at fixing things...  ;)
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ChrisPee

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Re: Erratic 2.2
« Reply #34 on: 25 January 2023, 10:26:08 »
I have a new relay, pump and filter. As far as I know this car hasn't been serviced for at least 5 years - hence the fuel, air, oil filter, oil and plug pre-purchase anyway.
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ChrisPee

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Re: Erratic 2.2
« Reply #35 on: 21 February 2023, 18:32:51 »
Update, I have had a diagnostic on the car Monday and there were several fault codes - misfire cylinder 1 misfire cylinder 3, alarm, etc etc. I had already replaced plugs, rocker cover gasket, coil pack, fuel filter, fuel pump, cleaned crank breather pipe and throttle body. All fault cleared (and EM light and ABS light. Car then ran great. Started car today (instantly) then began running rough again - fault codes remaining are;

PO170-2 Lean Exhaust Not Present
P1555-0 Throttle Position Sensor (TPS) - load signal not plausible with engine load.

Can someone tell me where the TPS is please?
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Doctor Gollum

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Re: Erratic 2.2
« Reply #36 on: 21 February 2023, 19:22:07 »
Built into the throttle body ;)

Before you order a new one for the price of another Omega, you have removed it and cleaned it thoroughly as per the guide whist doing all the other work?
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ChrisPee

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Re: Erratic 2.2
« Reply #37 on: 21 February 2023, 19:37:46 »
Yes Doc, and cleared the tiny 1.5mm hole. It was very gummed and black. Where is the TPS on an Omega, because as of now I'm baffled.
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dave the builder

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Re: Erratic 2.2
« Reply #38 on: 21 February 2023, 19:48:43 »
Quote from: ChrisPee on 21 February 2023, 19:37:46
------ - - - - -. Where is the TPS on an Omega, because as of now I'm baffled.
::)
Quote from: Doctor Gollum on 21 February 2023, 19:22:07
Built into the throttle body ;)



Throttle Position Sensor = TPS


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Doctor Gollum

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Re: Erratic 2.2
« Reply #39 on: 21 February 2023, 19:49:10 »
It's built into the throttle body along with the motor that drives the throttle plate.  ;)
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ChrisPee

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Re: Erratic 2.2
« Reply #40 on: 22 February 2023, 10:38:00 »
Thanks Doc.
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