Main Menu

Fuel System

cold start idle problem

When starting cold, engine will start, but the idle rpm does not rev above idle speed. I have to increase the throtle to keep it running. Performance is fine. I'm thinking it's the Auxarily Air Valve.

911SC Charcoal Canister to Air-box Hose Replacement?


I was recently replacing spark plugs on my 1983 911sc and on the left side I must have placed some pressure on a hose (braided/rubber in appearance) and it came apart. Upon inspecting it the hose routes from a nipple on the left side of the airbox to around the front of the engine (firewall) to a canister on the right side of the engine compartment (charcoal canister I believe). Could you tell me a little of what this does and also what the name of the hose is or possibly where I can get a replacement or another type of hose I can use. 


Starting a 911 that has been sitting for several years

Model: 1989, Year:911, Mileage:80,000, Type of use:Street use only
I have a 1989 911 that has been sitting for five years in the garage and was not started/ driven during that time. Engine turns over fine but will not start. I have removed the old gas from the tank - it smelled bad but had not changed consistency. Tank is clean (no rust, gunk) etc. What are appropriate next steps?

Warm start problem

Model: 911, Year:1974, Mileage:61,000, Type of use:Street use only

2.7 RS MFI and ethanol

Model: 911S, Year:1974, Mileage:170K, Type of use:Both Street & Track
I'm looking for advice on the effects of the up to 10% ethanol blends that are now commonplace, will have on the MFI system over time. I have a '74 911S with the '73 spec RS motor and MFI. Also any suggestions for preventing damage to the system. I store the car with a fuel stabilizer, but still worry about moisture.

adjusting fuel mixture for altitude

Model: 911, Year:1976, Mileage:150k, Type of use:Street use only
my 911 has always been at sea level..ran I live at 8600,seems to be running rich..If I adjust co for this altitude,will I have to readjust when I drive back to sea level.Will it be too lean at sea level ?Don't want to fry it...Thank you GENE

cold start problem

Model: 911 SC, Year:1982, Mileage:70K , Type of use:Street use only
Warm start is fine. When cold, must give gas or won't start. Starts and dies, even with gas for first two or three tries, then will run as long as you give it gas. After 30 seconds with gas will continue to run with foot off gas.

fuel pump leak with ignition on

Model: 911s, Year:1977, Mileage:120000, Type of use:Street use only
When the ignition is turned on, and left on for a few moments I hear the fuel pump operating. If left on too long I get fuel leaking. This can't be normal? What might the issue be?ThanksRichard

o2 sensor

Model: 911s targa, Year:1976, Mileage:100k, Type of use:Both Street & Track
I pursched a cat by pass pipe with out a O2 bung hole, then sent it to jet-hot to be coated. Yea I know, always test fit.... now the question is does a 81 sc have to have the O2 sensor???

1980 SC - Fuel Tank Crack

Model: 1980, Year:SC, Mileage:78000, Type of use:Street use only
I just noticed that I have a small crack where one of the fuel lines connects to the fuel tank under the front hood. I was thinking about using epoxy on it. Any thoughts on this? Any particular epoxy that you would recommend?Thanks!


Subscribe to RSS - Fuel System