Engine Flooding-cutting Out

[Tazzzzman1]

Hi,

 

Hope someone can point me in the right direction....

I have an issue which is puzzleing me. It only occurs when I am going downhill (bit of a pain as I live on a hilll). The car will splutter and cut out at low rev's. It appears to be an over fueling/ flooding issue, as I need to press Accelerator peddle fully down to restart. Sometimes I can clear trhe problem by revving hard for a while. On the restart/ revving I can smell unspent fuel kicking out of the exhaust!

I have a 38DGAS weber carb which has been jetted for 2.0l pinto. Car seems to run fine on flat or uphill. Any suggestions?

[miikae]

Firstly i would check the float level is correct , float not split or sticking , float valve is free and sealing ok , lots of info Here

 

I trust the fuel pump pressure is correct for running carbs?

 

Mike

[Tazzzzman1]

Hi Mike,

 

Yes using a mechanical type pump and seems to have plenty of pressure. Looks like a weekend strip down of the carbs to check out the float chamber. Thanks for the info.

[miikae]

If you have a gauge check the fuel pressure is not too high , approx 2-2.5psi as too high a pressure will possible force fuel past the float valve and cause flooding.

 

Mike

[Grim]

if you want to check that i have a mechanical fuel pump that's almost new that you can have

[Tazzzzman1]

Hi Andy,

 

Yes might take you up on that. Will you be at the Fox on Wed?

[Grim]

yep, i'll be there. I've put it in my boot already so i wont forget

[Guest moose]

Hi

 

I have the same, or a similar problem. I am new to these vehicles, but find that in my case, the fuel consumption seems to be high even when I drive gently and after a short period of idling the engine will start to cut out. I currently have a Webber carb, and have been blaming that, but high fuel pressure could be a problem. I note that there is no return fuel pipe could this solve the problem. I love the car but was not the builder.

[Tazzzzman1]

Hi,

 

Thought I'd give an update to what I found...

Thanks for the pump Andy, although unfortunately did not make any difference. So stripped down Carb abd adjusted floats to recommened settings. Again made no real difference, although the floats were found to be out of adjustment by quite a bit...

 

Thanks to Nigel, who lent me the use of his fuel pressure guage. Found that the pressure was almost 7PSI....way way too much. No wonder the old gal was a bit thirsty and would flood.

Bought an adjustable fuel regulator and now running at 2.5-3PSI. So far fingers crossed the car seems to be running fine and is not flooding on me. I hope to give it a good test when driving down to Stafford and hope I won't be making so many visits to the pumps on the way!