Sick Discovery

[Thomas Harrold]

Hello can anyone please help me ?
I have a 1996 discovery v8 that is not well, The disco is running ruff (it sounds like its running on 7 cylinders) and rich, it wont idol and will sometime ramdomly cough as its driving along.
Does anyone have any idea why?

[mike 90 RR]

Does anyone have any idea why?

There's a wide range of reasons .... To narrow it down

What does the ODO say?
You using a mechanic?
When was the last service?
What & when was the list of parts you replaced?

[Thomas Harrold]

The odomitor says 276 222 km.
I don't have a michanic but my Dad use to teach me.
I have only had the Disco from December and it was serviced then with a new oil filter and oil, the vacume advance was fixed and a new fuel filter.
When i got the Disco it hadn't been running for a couple of years.

[mike 90 RR]

When i got the Disco it hadn't been running for a couple of years.

Mmmmm ... So many directions to chose from ... Then lets start with the simple things first


Check the rubber intake hose from the MAF to the throttle body for splits
Check for split vacuum hoses in general

Change the spark plugs ... use NGK

In total darkness (night time) ... Lift the bonnet / Start the motor up and look at the spark plug leads for arking ... If you see blue electrical arking, then change the leads

Unplug the electrical connection to the MAF / start it up and see if it changes things


Start there and see how it progresses


Under the wheel arch at the drivers side rear wheel is a fuel filter ...That's what you changed?
Do you have a compression gauge?


Cheers
Mike

[Thomas Harrold]

Mmmmm ... So many directions to chose from ... Then lets start with the simple things first


Check the rubber intake hose from the MAF to the throttle body for splits
Check for split vacuum hoses in general

Change the spark plugs ... use NGK

In total darkness (night time) ... Lift the bonnet / Start the motor up and look at the spark plug leads for arking ... If you see blue electrical arking, then change the leads

Unplug the electrical connection to the MAF / start it up and see if it changes things


Start there and see how it progresses


Under the wheel arch at the drivers side rear wheel is a fuel filter ...That's what you changed?
Do you have a compression gauge?


Cheers
Mike
Thank you so much Mike, i will do that ASAP, and yes i do have a compression gauge and i will do a compression test.
Thanks for all your help :)

[Nomad9]

Hi Thomas,
Not on gas is it?

[Thomas Harrold]

Hello Nomad9, no the Disco isn't on Gas as yet but it will be, and i've been told i'll need to have lower tempreture spark plugs for it.

[Nomad9]

Hi Thomas,
My 1986 Rangie was on gas I've just ripped it out after toasting my second MAF, they are getting progressively hard to find and new cost in excess of $800, something to be aware of. If the gas backfires it can damage the MAF to a point that it won't work. The reason I asked about gas was because a lot of the symptoms you describe turned out to be my MAF damaged.