starting issues after car sits for a while

[CrisZenithBlue]

Originally Posted by blue62

Cris,
Have you tried reclibrating your E-gas (throttle)?????
To see if it helps your hard starting when hot issue???
It's a long shot but easy to do.

I do really think it is an EVAP issue.
Perhaps when the mechanic removed the intake he did something to the EVAP hoses valves or connections. Hoses and some valves for the EVAP are right there.

If you want to give recalibrating the E-gas a shot, this is what you do.
Disconnect the battery for a few minutes so the ECU drops the E-gas calibration settings.
Reconnect the battery.
Turn the ignition to the on position "do not start the car"
Do not touch the gas pedal.
Let it set that way for at least 1 minute.
Turn key off for at least 10 seconds.
Start car.
Thats all there is to it.

I'll try that, nothing to lose
also, i'm doing the plenum and 74mm throttle body upgrade soon and will have a look around the intake. The only thing i tried there was replacing the purge valve that sits on the left side of the engine, what else is there from the EVAP system that i could look for?

[blue62]

Originally Posted by CrisZenithBlue

I'll try that, nothing to lose
also, i'm doing the plenum and 74mm throttle body upgrade soon and will have a look around the intake. The only thing i tried there was replacing the purge valve that sits on the left side of the engine, what else is there from the EVAP system that i could look for?

There is a diagram of the system in the Bentley service manual if you have one.
Or do a search here on the forum. I am sure there is a picture.

If that purge valve and the vacuum hose is easy to get to????
you could try pinching it off or disconnecting it from the intake.
Plug the intake where it disconnects.
Take the car for a drive to get it warmed up.
Then see how it restarts while hot.

If something is in the EVAP system that is causing the hot start issue.
disconnecting it for a short time may make a difference.

Keep us posted.

Just another thought: Have you looked at your fuel trims????
If your getting fuel vapors in the intake from the EVAP system, you should be showing Negative Short Term Fuel Trims.