I have a 2003 996tt, which has developed a warm start issue. When the car is warm it starts fine (first crank) but after about 10 seconds the RPMs go to 400 then sometimes the car cuts off. If i gas it for a bit then its good to go.
Need some help?


1. I changed MAF sensor,
2. Put new gas in car
3. I have read could be check valve on fuel pump?
4. Starts great cold and hot, rpm stabalize normal
5. Plugs have not been changed after flash
6. coils have not been changed after flash

I have EPL tune
Evoms intake
Fabspeed exhaust

 

Any codes? doubt its check valve as the car starts so it shows fuel pressure is there.

 

The car has no codes, runs like a champ once it gets going.

 

What happens if your tuner flashes the stock map back on? Does it still do it?

 

I have not contact tuner about issue.
I have not tried to put stock tune back
On car.

 

If its changed since the tune and it bothers you its pretty simple to do and may save you chasing your tail !!!! That will eliminate the tune, are the lambas quite new? Could be the post cat ones thinking the mixture is wrong or a temp sensor not detecting the car is already war.