Toqwik

I have a 91 305 tbi convertible. It has not left the garage in a year but I start it every week and it has stabilizer and fresh octane boost. It runs perfect for about 10 minutes. When it quits sometimes it stumbles sometimes it quits like the keys was turned off. Sometimes when it stumbles and dies it sounds like a short that I assume is the injectors trying to fire. I have even tried putting a screwdriver between the tbi and the linkage to keep the idle high and no help. I can the new try to restart and it won't start. I can let it sit 15 minutes and it fires right up and runs perfect again. This car is 100% original has all the pollution control and the cat is still there. I have replaced the ignition module but no change. This was my daily driver a few years ago and have never had an issue. I'm stumped, what are your thoughts? Thanks in advance.
Scott.

Toqwik

Please respond someone. I want to drive my car.

RBob

iTrader: (1)

Stop doing that, all it does is fill the engine with water. Just leave it alone until you are going to drive it. And either put a battery tender on it or disconnect the negative terminal.

Is there fuel pressure (9 - 13 psi)? Is there spark?

RBob.

Toqwik

Unfortunately I am usually by myself so it makes it difficult to check. It acts like it is fuel related. When it cranks but won't start it cranks fast and usually it stumbles before it quits. Sometimes there is erratic clicking after it dies that sounds like it is coming from the injectors. On initial start up or after it sits 10-15 minutes it runs 100%.

DynoDave43

iTrader: (11)

That's how my L03 powered G20 ran when the pump was bad. I limped it home quite a distance that way...run for a bit, die, coast to the shoulder. Let it sit for 5 minutes or so, it would restart, run for a while, die, do it all again.

Not saying that's your issue, just that it sounds familiar. As RBob suggests, grab a friend, and take a drive until it acts up. Testing is the only way to avoid throwing parts at it.