intermittent chugging/eratic idle

[jimjim2804]

have a toledo tdi 110,starts up ok but once it begins to warm up slightly idle gets lumpy and really chugs like a misfire when doing low speeds up the gears esp in 3rd and 4th,not as bad when im on motorway doing 70/80mph.
tried fuel filter and treatment.sorted it for a day but then came back,reckon it fuel related problem or injector maybe..any ideas..

 

[Nathanio]

Have yuo tried disconnecting the MAF sensor at all? Personally I would try an ECU reset and disconnecting the MAF if you are still getting the problems after the reset

 

[mac re]

yes i would try that!
my MAF went last year what a diferance once i changed it! yippppppppppeeeeeeeeee!

 

[jimjim2804]

tried maf but didnt do anything,i got my injectors tested,nothing showed up.done a compression test,everything fine there.i think the fuel pump is next,dont give much trouble so im told,its definitely a fuel problem,also noticed a lot of air bubble in the fuel line from the fuel filter to the pump,i wouldn't say that is helping it.maybe the pump is drawing the air into the system???

 

[silver surfer]

has the fuel filter been changed recently had trouble with cheap filters from euro crap parts hole for return valve too large for seals to seal properly letting air in and giveing me no end of stress

 

[jimjim2804]

yea tried fuel filter and the valve,also put treatment in it which seem to have cured it for a day??mite be worth trying another filter..

 

[silver surfer]

how much fuel have you got in tank may be youve got some dodgey fuel ie lot of water in it or some thing

 

[jimjim2804]

no i checked the tank then filled it up.
Has anyone ever got the diesel pump changed for similar problem,dont fancy taking a chance buying one,a bit too expensive,a bit of a gamble..

 

[jimjim2804]

I tried a diesel injection pump and it made no difference so put the old one back in and luckly they took the pump back.
then i tried engine speed sender still no luck..