Hi Fellas,

Im not sure if this should be in the LPG section or in here since its a V8 but Im posting it up so mods feel free to please move it if you like

The car is an 91 oct eb v8 efi on dual fuel.

The car has a horrible flat spot from about 2000-2700 rpm and this happens only on gas. It has impco 225 mixer on it. I have currently changed spark plugs, cleaned maf and set tps voltage to .98v.

Is anyone else experiencing this issue ?? The car has done 340,000kms. It has no flat sport on petrol and can go all thru the rev range without issue. It is running only a cat back exhaust and a pod filter which was on the car when i bought it a couple of months ago.

Any help is appreciated

Ray

maybe diaphram in mixer?

Hmmm does that mean i have to get it changed or????

just check its not torn/collapsed

This has just happened to me!! Mine wouldn't start on fuel then It did and runs fine use has and it just won't rind dies loses power cool thanks for I for will get back to u if diaphragm is suspect