Coughing and farting !!!

[wizard]

Mrs wizards 1989 Rangie runs fine on gas, but occasionally coughs and farts when on petrol. When its in coughing and farting mode it wont rev over 2k and top speed is about 40mph. Switch it back to gas and its fine.

I think its either a blocked filter, dodgy fuel pump or crappy fuel.

My question is........

Where is the fuel filter hidden. I cant find it.

I assume the fuel pump is in the fuel tank.

Regards
wizard :twisted:

[gingernutsv8]

It's on the off side next to the tank

[wizard]

Cheers
I'll have a look later.

wizard

[andrew2986]

Hiya,
Ive a 97 V8 Disco, the fuel filter is in the O/S rear wheel arch and the pump is in the tank. mine coughed and spluttered on petrol for a while. turns out the fuel pump was on its way out.

Andy

[wizard]

Hi
I put on a new filter and she is now as good as gold.
Thanks for your help.

wizard :twisted:

[wizard]

Hi
I put on a new filter and she is now as good as gold.
Thanks for your help.

Well that was a bit premature.

After replacing the filter it did run great for about 2 weeks and then went back to coughing and farting.
I blew the fuel lines out and it ran fine again for a few weeks. Now its only running on one bank of cylinders.
The drivers side 4 cylinders all have a good spark but the rough running remains if i pull off a spark plug lead on any cylinder on this bank, so i am assuming that there is a fuel problem on this bank.
Is there a common rail fuel supply to the injectors (I assume it has injectors) and can i buy a replacement "bit"

She runs great on gas, and was running fine this morning on petrol, so the problem is intermittant.
I have just replaced the dizzy cap, but couldnt get the rotor arm off and gave up because its blowing a gale.

Any adive greatly acepted.

wizard

[bogie]

Sounds like one of those mystery efi things,you do one thing that cures it and then sumit else goes tits up,Good luk Mr wizzard!

[tack43]

Check the LPG emulator connections for the bank thats not working.  ;)

Rich

[Tel]

Hi gerard is yours hotwire or flapper ie 3.5 or 3.9

[wizard]

Check the LPG emulator connections for the bank thats not working.  ;)

Hi gerard is yours hotwire or flapper ie 3.5 or 3.9

Rich

What are you talking about !!!!

I am a diesel monkey and know less than nothing about v8's all i know is its a 3.5 1989 4 door rangie.

I was discussing this problem with mrs wizard last night (as you do) and she said that when its on gas it is fine, if you switch over to petrol it will run rough most of the time, but if its on petrol and running fine it will always run fine so it seems to be a problem when switching over from gas to petrol.

It is ok at the moment(on petrol) I will leave it on petrol and see how long it take before it starts to cough and fart again.

I think i will invest in a Hayne's manual as well.
Regards
wizard

[trecfive]

Sometimes when running on gas for a long period(start on petrol then switch to gas) the dry gas dries out the internals, and you have to run on petrol to lubricate ,hence the farting and coughing. When things moisten up it will run OK on both.If only going a short distance keep it on petrol.Try changing back to petrol before ending your journey and switching off.

[wizard]

Hi
That makes sence as it is always running on gas.

wizard

[Oz]

i had this same problem with 3.5 diso the above cured it.. mine just need the petrol to lube it up. so not just befor turning her of i make sure she has run on petrol for 5mins first :)

[tack43]

The fact that you said one bank of cylinders was not working I guessed the emulator. This is a device to stop the petrol injectors injecting petrol while running on gas. If one wasn't working or intermittant, only one bank of cylinders would be affected. Check the connectors to the petrol injectors (the emulators plug in between them) you will have 2 emulators, 1 for each bank, so controling 4 cylinders each.

Hope this spreads a bit of light.  :?

Rich