Hot starting problems.... on a 914/6 Options

[914_6conv]

Hi, new to the list but not to 914s. My problem is that whenever i try to restart the engine after a short stop, lets say a fuel fill-up, it just doesnt. It cranks, but does not fire. After a while, 5-10 minutes, it does. No problem on cold start, it fires right away. I suspect bad coil, misbehaves when hot. But once started, it runs fine. any clue? My set up: Blue coil, Permatune, Pressure regulator, webers on a 2.2E engine with S-cams. Thanks to all.

[si2t3m]

AHAHA!!! It's not a startup procedure, it's was just something to test.

So it was basically richening out the mixture in each step:

Step 1: It should start this way
Step 2: Might not be enough fuel, let's give it some.
Step 3: Still might not be enough, let's give it more.
Step 4: Obviously flooded, let's try and lean it out.

When my engine is cold, like this morning i'll let the fuel pump prime the system and i'll floor it 2 or 3 times. This activates the accelerator pumps each time squirting extra gas in the cylinders. It usually catches on the first try. I'll then blip the throttle, each time injecting gas again from the accel pump to prevent it from stalling. After a couple of seconds, i'll get a steady rpm, but if i let go the pedal, the rpm's will climb down to around 100 so i keep the gas pedal pressed a bit. after around 10 seconds of this, the engine speed will pickup (without me changing anything with the gas pedal). At this point, i know i'm ready to take off.

When the engine is hot, i'll start it without touching the gas. On some occasion, while cranking, i'll give it 1/4 gas pedal if it's medium hot! (IMG:style_emoticons/default/wink.gif)

If one screws the procedure, and floods the engine what is there to do??? I was always tought (on a carbed engine) to floor the gas pedal. It will initially squirt extra fuel in the cylinders but once the accel pump is empty no more fuel is coming from it. The carb is now letting way more air that gas in the cylinder 'drying out' the combustion chamber. Eventually the air/fuel mixture will be ok, and it will start. It does take a while before it 'leans out' but it will do it.


Heck the flooring thing even works with FI! Passat had a bad coolant temp sensor so it was dumping extra fuel when hot (was thinking it was cold). The only way to start it was by flooring the pedal and keeping it there and start cranking.

Marc-André