Thread: D2 missing under load

MAF fuse is ok,,,

So no fix yet ? Did you try the leads , Maybe not if it died ,Just might be the fuel pump

Pedro
My d1 V8 had a bad miss when cold, a slight miss when warmed up.. noticed it more driving up hill , ,turned out to be the fuel pump...
cheers brett

Originally Posted by smally4.6

Pedro
My d1 V8 had a bad miss when cold, a slight miss when warmed up.. noticed it more driving up hill , ,turned out to be the fuel pump...
cheers brett

For the fuel pump
Usually you test it via a pressure gauge,which i don't have in my tool kit .... I usually disconnect the fuel line and get it to fill up a bottle, just to see if it is working

Just a theory, Has anyone heard of, or confirm this....
Test via how long it takes to fill up 1 litre bottle / Time it takes = pressure of pump

Originally Posted by rangieman

So no fix yet ? Did you try the leads , Maybe not if it died ,Just might be the fuel pump

have been waiting to get it on the LR testbook--
they said
" LEADS!!!! dont drive it untill you change them,,,"
as they would,,,

so I drove it home to Maryborough (from Toowoomba)

replaced the leads,,
quite a few were corroded,,
some arcing marks as well,,

and it's made ------


not an ounce of difference when cold.

just a quick question---
why would the fuel pump work better (but never perfectly)after 10 minutes?

I'm assuming the pump will stay the same temp as the fuel its sitting in---


whereas if the ecu is jammed at "one engine temp", this would explain the extreme roughness when cold,,

but maybe not the lack of go when hot??


?

Originally Posted by Pedro_The_Swift

just a quick question---
why would the fuel pump work better (but never perfectly)after 10 minutes?

I'm assuming the pump will stay the same temp as the fuel its sitting in---


whereas if the ecu is jammed at "one engine temp", this would explain the extreme roughness when cold,,

but maybe not the lack of go when hot???

The pump is on it's way out ...... or has rusty / bad connections

It gets better because the wires heat up & vibrations of car ... giving better connection ... basically bad earth or power feed

ECU temp jamb would be like starting a carby car with no choke .... But once warmed, it should run normal (perfect)

I take it Pedro, that you believe you have symptons of "Fuel Starvation?"

G/day Pedro
A cold engine demands more fuel?
When my disco had a miss, it was worst in the morning driving to work?
as engine reached normal temp, miss was more like a flat spot....
you do need a pressure gauge to check pump,drive while connected!
I dont know if you can do this on a d2?
i cant remember what pressure mine was operating at....Justinc tested mine...

Maybe someone else can help with pressure required at fuel rail?
cheers brett