Problem with injector durration and fuel cut

Boostoholic · Post by **Boostoholic** » Mon May 05, 2008 12:01 pm

Hi everyone I'm new to Kpro and recently started having trouble with my car. Its an '02 RSX-s with a custom turbo kit running about 8lbs. A few days ago my car started acting up, Whenever i go full throttle it will jerk violently and the RPMs will go all over the place. The only thing different in my DL's is the injector durration is through the roof. If the problem is not in my tune my only other guess is my fuel pump is going and im losing fuel pressure.

Also I dont have a stock primary so the datalogs are using and AEM UEGO

Thanks,
Travis

Post by **Spunkster** » Mon May 05, 2008 12:44 pm

If you don't have a primary o2 then you cannot use lean protection. IT will only work using the factory wideband sensor.

Boostoholic · Post by **Boostoholic** » Mon May 05, 2008 12:50 pm

Then what would be the cause of my car feeling like hitting fuel cut and my injector duration being so high?

Post by **Spunkster** » Mon May 05, 2008 1:31 pm

It is shutting down becuase of the lean protection. Turn it off.

Boostoholic · Post by **Boostoholic** » Mon May 05, 2008 3:17 pm

Spunkster wrote:It is shutting down becuase of the lean protection. Turn it off.

I tried turning it off didnt solve the problem :(

Post by **Spunkster** » Mon May 05, 2008 4:56 pm

Post the new calibration and a short (under a minute) datalog showing the problem.

Boostoholic · Post by **Boostoholic** » Mon May 05, 2008 5:21 pm

Spunkster wrote:Post the new calibration and a short (under a minute) datalog showing the problem.

Will do as soon as I can tomorrow

Boostoholic · Post by **Boostoholic** » Tue May 06, 2008 1:16 pm

Heres the new ones for today. I think the problem may be caused by my fuel pump going out giving me low pressure and hard starts.

Post by **Spunkster** » Tue May 06, 2008 1:54 pm

That is not under a minute. What is the timestamp where you experience the problem?

Boostoholic · Post by **Boostoholic** » Tue May 06, 2008 2:20 pm

The worst case of it is between 5:00 and 5:10

Post by **Spunkster** » Tue May 06, 2008 2:39 pm

I don't see any problem at that timestamp.

Boostoholic · Post by **Boostoholic** » Tue May 06, 2008 2:49 pm

check the injector duration. I dont think it is supposed to be that high.

SVAILLAN · Post by **SVAILLAN** » Sun Jun 08, 2008 4:01 am

check for a vacuum leak, do you have a fuel pressure gauge on the rail/what does it say, someone whas having trouble sort of like this and he ended up having a bad fuel filter.

Rallyeman · Post by **Rallyeman** » Sun Jun 08, 2008 5:56 am

I had similar problem, try calibrating the TPS!!