Mud-club

Vehicle & Technical => Discovery => Topic started by: muddydigger on March 30, 2007, 12:46:21

Title: Sick 97 v8 Disco
Post by: muddydigger on March 30, 2007, 12:46:21

Gday all,
As above the car seems to chug under load. A slight hill doesnt seemt o be a problume if you kikck it back a gear, but if a back off fro a bend it stsrts chugging like [!Expletive Deleted!].
At ideal its fine and revs freely when not in gear.
Changer plugs, leed ,coil vacume advance ,and fule filter
amy ideas?

Title: Sick 97 v8 Disco
Post by: petergalileo on March 30, 2007, 21:15:15

Any smoke from the exhaust ? Air filter okay ? Any warning lights ?

Title: Sick 97 v8 Disco
Post by: muddydigger on March 31, 2007, 06:24:53

No, there is no smoke from the exaust, and no warning lights either. Air filter is near new but I did check it just incase and it seems to be fine.
The airflow meter is a reconditioned on and has run well untill a week ago.
It does seem to be rich and is using alot of fuel.
So Im thinking fuel mixture, fuel pressure or timing.
Replaced plugs, leeds, coil and fuel filter no change.
Any other ideas?

Title: Sick 97 v8 Disco
Post by: petergalileo on March 31, 2007, 08:30:14

If you think its over fueling I would look at the engine temperature sensor as the ECU uses that to judge the "choke" position.  Also check for intake vacuum leaks, specially the pipes going to that little plastic ball.

Title: Sick 97 v8 Disco
Post by: muddydigger on March 31, 2007, 09:39:28

Quote from: "petergalileo"

If you think its over fueling I would look at the engine temperature sensor as the ECU uses that to judge the "choke" position.  Also check for intake vacuum leaks, specially the pipes going to that little plastic ball.

Its doesnt have a small black ball, I know the one you mean I had it on my Rangie but this doesnt seem to have one?

Title: Sick 97 v8 Disco
Post by: Range Rover Blues on April 01, 2007, 14:14:19

Mine started doing this too, after I changed the dizzy cap and arm.  Trouble is it does it under high load, so you think it's fine unitll you are halfway past something then it runs out of go, still smooth just gutless.

Title: Sick 97 v8 Disco
Post by: muddydigger on April 01, 2007, 19:45:12

Quote from: "Range Rover Blues"

Mine started doing this too, after I changed the dizzy cap and arm.  Trouble is it does it under high load, so you think it's fine unitll you are halfway past something then it runs out of go, still smooth just gutless.

Its pretty well doing it all the time now, its just no where as noticable on level graound, but the chug is evident.

Title: Sick 97 v8 Disco
Post by: daveyravey on April 02, 2007, 12:55:22

Did you change the rotor arm lately ? If so there are a bunch of faulty, read cheap units in circulation. Dunno if they've found their way to your shores tho'. The faulty ones are shiney black with a "brass" rivit in the top. They break down after a while & short out through the dizzy shaft.
If that doesn't work, try bypassing the temp sender for the fuel as mentioned by petergalileo. Take off the plug & push an opened paperclip into the contacts bypassing the sender.

Title: Sick 97 v8 Disco
Post by: Range Rover Blues on April 03, 2007, 17:55:44

I'll have a look at that sender, because for some reason mine has a resistor in parallel with the resistor and I remeber diturbing it when I fitted the new dizzy cap and arm.

I have replaced the ol arm and it's no better.  Havn't had a chance to checkout the old cap again yet, maybe tonight...

.....no, I can't, it's life on mars :D