Tips for 911

[Desert911]

Any threads hereto help with a poor running 911 that's been in storage for 5 years? I've drained the gas and the tank and tank screen/ filter look good. The car runs and drives but it does cough or backfire thru the airbox and starts to smoke some once it's warmed up.
Any suggestion for any addititives to maybe clean the injectors?
Is the smoke from bad valve seals? Car didn't smoke when I stopped. Driving it 5 years ago. The car does 195k original miles and is a 1980 911 sc targa
Thanks for any help or suggestions.

[Targa Me]

I would start with a complete tune-up, including a fuel filter, plug wires, air filter, etc.
Drive it for a while to see if it cleans itself out.
If not, do a compression and leak-down test.

[porwolf]

Originally Posted by Targa Me

I would start with a complete tune-up, including a fuel filter, plug wires, air filter, etc.
Drive it for a while to see if it cleans itself out.
If not, do a compression and leak-down test.

+1 on complete tune-up as above. I had my '79SC in storage for 16 years with gas in the tank. The biggest problem were the clogged and gummed-up gas tank fuel line connections. I would make sure that you take the tank fuel filter out, and carefully clean the fuel outlet area around the inside bottom of the tank fuel filter area. Get a new fuel tank filter, here at Pelican, it is only about $45.-. Then make sure that the fuel return tube into the tank is clear and un-obstructed. Check with compressed air! Ask me how I know.

[RWebb]

add some Stabil or similar to the tank, then do the above

[Desert911]

You guys are awesome! Thanks for the quick responses and awesome info.

[zippy_gg]

Doesn't the SC require a pop-off valve to protect the airbox?
I would also take a close look at the fuel lines over the engine for cracks.

[timmy2]

This will keep you busy!
Long term & Commonly Neglected Maintenance

[Desert911]

Originally Posted by zippy_gg

Doesn't the SC require a pop-off valve to protect the airbox?
I would also take a close look at the fuel lines over the engine for cracks.

I do have the pop off valve installed luckily. I did end up doing an oil change and spark plugs and added some seafoam oil and fuel treatment and went for another drive. I'm really skeptical of any of these additives but 20 miles of driving and or this product and she's running great. I do need to do plug wires and probably fuel filter here soon.
I'll check all the other mentioned things along with fuel lines.

Head lights don't stay on unless I hold the dimmer switch so that needs to be addressed, man it's always something but I really appreciated the help.
Mike

[Desert911]

Originally Posted by timmy2

This will keep you busy!
Long term & Commonly Neglected Maintenance

No kidding,I have some reading to do.
Thanks

[porwolf]

Originally Posted by Desert911

I do have the pop off valve installed luckily. I did end up doing an oil change and spark plugs and added some seafoam oil and fuel treatment and went for another drive. I'm really skeptical of any of these additives but 20 miles of driving and or this product and she's running great. I do need to do plug wires and probably fuel filter here soon.
I'll check all the other mentioned things along with fuel lines.

Head lights don't stay on unless I hold the dimmer switch so that needs to be addressed, man it's always something but I really appreciated the help.
Mike

Good going! And if you need help to fix that dimmer/directional switch ask for help here. Common problem, can be fixed rather easily.

[Desert911]

Originally Posted by porwolf

Good going! And if you need help to fix that dimmer/directional switch ask for help here. Common problem, can be fixed rather easily.

Help! I've done some reading,it looks like I need to replace the dimmer but didn't seethe part for my year listed here. Any tips and all advice welcome.
Mike

[porwolf]

Originally Posted by Desert911

Help! I've done some reading,it looks like I need to replace the dimmer but didn't seethe part for my year listed here. Any tips and all advice welcome.
Mike

If you are talking about the dimmer/turnsignal switch on the left side of the steering wheel that is available new at Pelican:

Pelican Parts - Product Information: 911-613-305-00-M78

That switch with age has the tendency to turn on the bright head lights at the slightest motion. That switch can also be fixed. Here are acouple of links for that:

Headlight hi/low beam issue - newbie

Hi Beam Switch: Poof! Headlight Switch OK?

Lost my low beams.

Problem with Steering Column Switch

Some headlight wiring help

turn signal switch quick fix pictures

Good luck!