Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[symes]

as said-had missfire-erratic running NOT plugs+leads IT was my expansion tank=pipe from throttle body to header tank was blocked(inside header tank) - Unblocked header(must fit new one-when I find ir )
Miggy now runs sweet again

[Lazydocker]

as said-had missfire-erratic running NOT plugs+leads IT was my expansion tank=pipe from throttle body to header tank was blocked(inside header tank) - Unblocked header(must fit new one-when I find ir )
Miggy now runs sweet again

Ooh... A bit of throttle icing! Uncommon in this country but does happen, as you have proven

[Andy H]

Weird. That pipe is there to stop ice forming in the throttle body.

I have had carburetor icing on old cars and motorbikes and it really screws up the running. I had assumed that the Omega would use the air flow meter to calculate the fuel requirement and wouldn't be so badly affected maybe at small throttle openings it uses the throttle position sensor but gets the fueling wrong because the throttle is bunged up with frost 

[note to self] must type faster! [/note to self]

[Webby the Bear]

hi guys,

sorry i'm confused as to what's happened here.

so the coolant pipe from expansion tank to throttle body was blocked not allowing coolant to the throttle (butterflies presumably?) and the butterflies froze? therefore i suppos the throttle position would have been out compared to the air coming in read by the MAF.

I got that right? lol?

what was it blocked with symes? 

[Lazydocker]

hi guys,

sorry i'm confused as to what's happened here.

so the coolant pipe from expansion tank to throttle body was blocked not allowing coolant to the throttle (butterflies presumably?) and the butterflies froze? therefore i suppos the throttle position would have been out compared to the air coming in read by the MAF.

I got that right? lol?

what was it blocked with symes? 

To make it short and simple... Google the "Venturi Effect" for more information But...

The air, which is mist, accelerates as it passes through the restriction of the throttle bodies. This acceleration (change in pressure) also cools it dramatically and causes the moisture in the air to freeze. This frozen moisture restricts the movement of the throttle bodies

That's in very basic, layman's terms... Like I said, google as above or "Carb Icing" for more info

[Webby the Bear]

hi guys,

sorry i'm confused as to what's happened here.

so the coolant pipe from expansion tank to throttle body was blocked not allowing coolant to the throttle (butterflies presumably?) and the butterflies froze? therefore i suppos the throttle position would have been out compared to the air coming in read by the MAF.

I got that right? lol?

what was it blocked with symes? 

To make it short and simple... Google the "Venturi Effect" for more information But...

The air, which is mist, accelerates as it passes through the restriction of the throttle bodies. This acceleration (change in pressure) also cools it dramatically and causes the moisture in the air to freeze. This frozen moisture restricts the movement of the throttle bodies

That's in very basic, layman's terms... Like I said, google as above or "Carb Icing" for more info

nice one lazy. already done venturis in carbs at school  but ill check it out 

[Lazydocker]

hi guys,

sorry i'm confused as to what's happened here.

so the coolant pipe from expansion tank to throttle body was blocked not allowing coolant to the throttle (butterflies presumably?) and the butterflies froze? therefore i suppos the throttle position would have been out compared to the air coming in read by the MAF.

I got that right? lol?

what was it blocked with symes? 

To make it short and simple... Google the "Venturi Effect" for more information But...

The air, which is mist, accelerates as it passes through the restriction of the throttle bodies. This acceleration (change in pressure) also cools it dramatically and causes the moisture in the air to freeze. This frozen moisture restricts the movement of the throttle bodies

That's in very basic, layman's terms... Like I said, google as above or "Carb Icing" for more info

nice one lazy. already done venturis in carbs at school  but ill check it out 

So they should have taught you about the cooling of air and the potential for carb icing

To help a little more... Many Light Aircraft still use carbs so carb icing is a real threat for them so you might find a little more detailed information on an aviation site

[Webby the Bear]

hi guys,

sorry i'm confused as to what's happened here.

so the coolant pipe from expansion tank to throttle body was blocked not allowing coolant to the throttle (butterflies presumably?) and the butterflies froze? therefore i suppos the throttle position would have been out compared to the air coming in read by the MAF.

I got that right? lol?

what was it blocked with symes? 

To make it short and simple... Google the "Venturi Effect" for more information But...

The air, which is mist, accelerates as it passes through the restriction of the throttle bodies. This acceleration (change in pressure) also cools it dramatically and causes the moisture in the air to freeze. This frozen moisture restricts the movement of the throttle bodies

That's in very basic, layman's terms... Like I said, google as above or "Carb Icing" for more info

nice one lazy. already done venturis in carbs at school  but ill check it out 

So they should have taught you about the cooling of air and the potential for carb icing

To help a little more... Many Light Aircraft still use carbs so carb icing is a real threat for them so you might find a little more detailed information on an aviation site

nice one  ill 'ave a butchers 

[Lazydocker]

Should add, the reason throttle icing is rare is because you don't have the additional temperature reduction caused by the vaporisation of the fuel, which is quite marked

[symes]

Dont know about ice freezing it up but honestly miggy was running sick this morning and when I cleared that blockage-ran sweet again Reckon my miggy got mind of its own

[Andy H]

Carburettor icing is only rare if you don't have carburettors and only drive on warm sunny days

On both my series III Land Rover & my old V8 Range Rover I had fit a means of heating the carburettors in cool/damp weather

Unleaded petrol seems to be much worse for icing than original full fat 4 star 

Nearly all cars (produced in the last 40 rears)  have had either a thermostatic air intake or a water heated throttle body to prevent icing. Kawasaki had to recall some of their motorbikes & fit electric carburettor heaters when unleaded fuel became common.

[Lazydocker]

Carburettor icing is only rare if you don't have carburettors and only drive on warm sunny days

On both my series III Land Rover & my old V8 Range Rover I had fit a means of heating the carburettors in cool/damp weather

Unleaded petrol seems to be much worse for icing than original full fat 4 star 

Nearly all cars (produced in the last 40 rears)  have had either a thermostatic air intake or a water heated throttle body to prevent icing. Kawasaki had to recall some of their motorbikes & fit electric carburettor heaters when unleaded fuel became common.

True... But then there are very few (if any) modern cars that have carbs

[symes]

Carburettor icing is only rare if you don't have carburettors and only drive on warm sunny days

On both my series III Land Rover & my old V8 Range Rover I had fit a means of heating the carburettors in cool/damp weather

Unleaded petrol seems to be much worse for icing than original full fat 4 star 

Nearly all cars (produced in the last 40 rears)  have had either a thermostatic air intake or a water heated throttle body to prevent icing. Kawasaki had to recall some of their motorbikes & fit electric carburettor heaters when unleaded fuel became common.

True... But then there are very few (if any) modern cars that have carbs

I know mate-as said weird cause/effect though-

[albitz]

Drove my Omega today,and it definitely had a misfire and a lack of power on LPG at around 2k rpm.Switched to petrol and it was fine.
Might try changing plug leads as I have a spare set.If that doesnt work, my recently replaced dispack "thought to be a good one but not certain",may be suspect. Other than that - LPG system problem I suppose.

[omega3000]

Carburettor icing is only rare if you don't have carburettors and only drive on warm sunny days

On both my series III Land Rover & my old V8 Range Rover I had fit a means of heating the carburettors in cool/damp weather

Unleaded petrol seems to be much worse for icing than original full fat 4 star 

Nearly all cars (produced in the last 40 rears)  have had either a thermostatic air intake or a water heated throttle body to prevent icing. Kawasaki had to recall some of their motorbikes & fit electric carburettor heaters when unleaded fuel became common.

Aye , my old Gpz 750 suffered icing but later model got the carb heaters