my 1980 911 won't start help!!!!!

bigboyracing · 10-04-2012, 01:34 PM

car has been sitting for 6 years...
i went to start to show a friend who wants to buy it
just turns over and won't start....i removed air filter and with my hand raised the thing inside and still nothing
next day i raised it again and sprayed starter fluid in it and it started!!!! but thats it......

Porchcar guy · Porchcar guy's Garage

After six years do you think the gas is still good ? Probably not and the fuel pump may be clogged as well as the fuel lines in the tunnel and the fuel filter. There are many threads concerning starting a car that has set for a long time...use the search engine and it will be your friend

Bob Kontak · Bob Kontak's Garage

The air sensor "thing" will still engage the fuel pump with the key on when lifted.

When you lifted the air sensor was the key on and did you hear the fuel pump run? That is an important bit of info you left out in your description. You said "still nothing" with no explanation of what that means. Obviously no start but fill in a few more details.

If it does run, grab one of your fuel injector lines right above an injector and yank up on it with reasonable force and pop the injector out of the o-ring. Have someone crank the engine while you observe if any fuel is spraying out of the injector. It is a pretty fine mist so position yourself where you have a dark background behind the injector for optimal viewing, You can also spray onto a rag (like I did back in the old days when I was dating) and see if there is a gas spot.

Report back.

Welcome to the forum.

Porchcar guy · Porchcar guy's Garage

Oh Bob, what an analogy...who does sleep on the wet spot :=)

Bob Kontak · Bob Kontak's Garage

Rags were the dates.

bigboyracing · 10-05-2012, 07:14 AM

thanks for responce When you lifted the air sensor was the key on and did you hear the fuel pump run?no didn't hear anything pump or injector noise...
You said "still nothing" with no explanation of what that means sorry no pump or injector noise
i tryed having a friend turn the ignition and nothing come out of the injector!!

Bob Kontak · Bob Kontak's Garage

OK - That is great from a trouble shooting perspective.

You need your fuel pump to engage as a first step. You will hear it loud and clear when it kicks in. If the fuel makes it into the CIS system it will sound like a screaming witch from hell.

The red round relay closest to the driver (in the front trunk) is the FP relay but check the fuse first. On the back of the plastic cover for the trunk fuse block is a diagram of the fuses. Check that fuse. rotate it a little if it's ok.

If fuse is ok, steal one of the black relays near the front of the car and place it in the fuel pump relay socket then lift the sensor with key on. If it works, get a new red relay at your earliest convenience as the red ones have some special insulation that only allows electricity to travel in one direction (that is my layman's take) and there must be a reason for that. I will say I have driven my 81 for 100 miles with a black relay in the fuel pump relay spot but changed it out ASAP.

That may get the pump working.

Another thought if pump works (just test it long enough to establish it works) is to clean out the fuel system for common sense reasons given age. Not sure how to do this thoroughly but it reasonable to assume "stuff" will dislodge and partially clog things. Sort of a pay me now or pay me later scenario.

bigboyracing · 10-08-2012, 05:03 AM

ok thanks
yes the injectors make a noisce and when i raise the flap it's gets really loud but steal won't start unless i spray startor fluid thanks.....
and i tryed switching relays and the same thing!!!!

chockymonster · 10-08-2012, 05:17 AM

When I tried to get my 82 running I had similar issues.

The fuel tank on mine was blocked solid and the lines from the tank to the pump and fuel filter were also gummed up. The fuel pump appeared to have swallowed some of the gummed fuel so wasn't spinning.

I had no option but to replace the tank, pump and lines.

My fuel pump would make a single clonk and that was it, does yours make any noise at all?

bigboyracing · 10-08-2012, 01:40 PM

yes when i jump it!!at the relay..

naples911 · naples911's Garage

chockymonsters on the right path, take the gas line off your filter putting rags underneath first, and crank it over once. See if any fuel comes out. if none, then follow chockymonster's replacement procedure. if it does flow out, then check at the fuel rail if injected. if fuel, then check injectors with a noid tool to see if some injectors are on strike.

Einstein said that if you can't explain something to a six year old, then you don't know what you're talking about. hope we're neither..

Bob Kontak · Bob Kontak's Garage

Quote:

Originally Posted by naples911

then check at the fuel rail if injected. if fuel, then check injectors with a noid tool to see if some injectors are on strike.

No stock SC has a fuel rail. Noid lights only work with injectors that are grounded out by the ECU - The SC has no ECU for FI. The SC has no electrical connections at the injectors.

CIS means Continuous Injection System which makes ALL injectors piss ALL the time as a result of fuel pressure - not electricity.

Your 84 pisses fuel one bank at a time. Injectors are not controlled individually.

Where you coming up with this info? You been working on a 94 Cavalier?

Bob Kontak · Bob Kontak's Garage

However, chockymonster is definitely on the right path. Pull an injector off of it's fuel line and see if you get flow from the open tube AFTER you confirm that fuel is making it to the fuel pump.

You may have some grunt work (or parts replacement) to get fuel to the injectors.

bigboyracing · 12:06 PM

still not running is there a regulater on here???i pulled the spark plugs and the where wet from fuel!!!so i guest the fuel system is work?????i didn't have anyone with me when i tried to get it started so i'm gonner start again turned key on raised air sensor and it made noise like a srceaming witch i also pulled the injector and raised the air sensor and nothing came out with key on never tried to crank motor(should i???) i jumped the relay term 30 i could here noise nothing out by the motor where the regulator on motor help am i on the right path?????

Bob Kontak · Bob Kontak's Garage

What have you done since your last post? Anything with the fuel lines, etc?

Did you pull an injector and lift the air sensor with the key on to check fuel. I only see where a friend turned the key and you looked for fuel from the injectors.

There is a warm up regulator between #1 and #2 intake runners but you will need fuel gauges to determine if it is operating properly.

We still do not know if fuel is getting through your system. That needs to occur first before warm up regulator adjustment or investigation.

bigboyracing · 12:52 PM

yes pulled injector lifted air sensor but no fuel came out how do i check the fuel pump????

Bob Kontak · Bob Kontak's Garage

Did the air sensor make noise when you lifted it? If so, your fuel pump is working.

bigboyracing · 11-12-2012, 01:35 PM

yes it did!!!!

john walker's workshop · 11-12-2012, 01:41 PM

may have been the frequency valve making noise, and not the pump. (80-83). what year is it? jump the 30 and 87 terminals on the pump relay and see if the pump runs. you can hear it, behind the gas tank.

Bob Kontak · Bob Kontak's Garage

Fuel comes out in a very fine mist. Make sure you are certain no fuel is coming out.

To trouble shoot your system you are going to have to do some work assuming no fuel at injectors.

The first thing I would do is disconnect one of the injectors from the fuel line and see if the fuel flows from the line. Get a jar and place the line in it. Key on and lift the sensor.

Report back. Once you start getting into this other folks will provide better data. On the up side, given you have the noise and the noise is from the engine compartment, pressure is being delivered to the fuel distributor. Your problem may not be wholesale degradation of the system.