gnez wrote: ...the two second run of the fuel pump completely fills the carb with fuel and floods it out. any ideas ?

First problem is that you apparently have a carb on that baby and not a TBI (Throttle Body Injector).

I suspect the lone fuel injector is stuck open.

gnez wrote: i replaced the injector with a new unit.

So does that mean it's okay now?

[EDIT] I don't know for sure if you mean you replaced the injector before or after the flooding.

Newbie

I recently was able to get my 84 Duke running after several "what could be wrong" situations. My task was relatively easy since I had a operating and compatible parts car, so rather then diagnosing problems to death, I merely installed the spare complete TB from the parts car. The car was no better for that, but I at least knew what the problem was "not".

In your case, I suggest that you disconnect the injector electrical conductors and see whether it still floods. If it does you can be "certain" that the problem is with either the injector itself or the injector gasket. With the injector disconnected fuel should not flow into the TB. That is what it says in my 84 service manual.

When I first looked at your posting I wondered whether you had accidentilly installed a V6 (much higher pressure rating) fuel pump. However our own "captain fiero" has a lengthy posting on Pennock's where he describes his successful installation of a V6 fuel pump onto a Duke.

One of the limitations of this website is that there is no provision for identifying the location of a member at the time of registation, so unless you do so in your posting the "local" members have no way of knowing where you are.

If you have not solved your problem by now and want to do another posting, please indicate where you live.

If you decide to merely change out the TB, please check http://www.fierosails.com - www.fierosails.com and look at the "interchange" topic since the Duke TB will not intechange for all years. 

Based upon my experience (see page 2 of my "Indy" posting) you might find it useful to check the fuel pressure since the 10 cent rubber hose connector between the fuel pump and the steel tubing is quite prone to failure. That probably is not part of your immediate  problem, unless you have two fuel issues. 

If the fuel pressure is signifcantly lower than the the standard range of 9 - 12 psi (mine was only 4 psi and was not sufficient to run the engine for more than a few seconds) you might just as well bite the bullet and spend a couple of hours (or more) dropping the fuel tank and replacing the 10 cent hose. One Pennock's contributor suggested installing hose clamps and that is what I did since my car would have run for some additional time until is stopped dead on a highway when "sponge" turned into "holed".

Cheers

Gary (another newbie) in North Vancouver.

convenient way to n e My gues is that you will find that  

How about you re-install the "old" injector, making certain that it is correctly seated and sealed? Or did you have the same problem with the old injector?

Then check the fuel flow once again with the electrical connection disconnected. 

If that does not work, please get back to us, because there are other possibilities.

You could look at the shop manual, but if it is anything like the 84 version, it will take more effort to figure out how to use the manual than it will take to solve your problem.

However, the first thing that I would do if the above does not sort out your problem is to check the fuel pressure. If the pressure is high (the V6 fuel system presure is about 45 psi) there are other possibilities that include:

• a pinched fuel return line.
• defective presssure regulator in the TB. Potentially that could contribute to increased internal fuel leakage or bypass since the normal Duke fuel pressure is only about 10 - 12 psi.

Gary

Grasping

Before you rip into the TB, you might want to check the following to see whether the small hoses at the fuel tank have been correctly installed.

Since the engine will not start you cannot follow the correct procedure for de-pressurizing the fuel system. In case you have lots of pressure, slowly open the fuel supply line at the inlet of the fuel filter. Disconnect it. The manual recommends that you next instal a hose onto the end of the fuel line to avoid getting fuel everywhere. 

Turn on the ignition key to initiate the 2 seconds of pump operation (you don't need to try starting the car) to make certain that the fuel supply line from the tank is correctly installed. If you don't get fuel right away you can jog the switch. You can hear the fuel pump running when that is happening.

If it is OK so far, disconnect the fuel return line at the TB and blow though it to check for any back pressure. There should be "none".

If there is a connection problem, see below. 

The photo below shows the three small hose connections (supply, return, and to the charcoal canister) near the fuel tank:

• one with two hose clamps
• another with a single hose clamp
• the third with a spring clamp.

The clamps were installed like that to avoid incorrect installation, or that was the plan. The clamps are the same on both ends of the hoses, or certainly should be.

I don't know whether reversing the supply and return lines can even cause your type of problem, but within just a few minutes you can at least confirm that everything piping-wise is OK in that part of the system.  

Good luck, again

Gary