98 Procharged Vette P1514

[gmcski]

hey guys
Got finishsed tunning this 98 a4 vette
on the dyno things went well no codes any of that just power
Customer drives off the lot and gets a P1514 code and reduced engine power
this is something to do with the throttle body and maff flow rate I gasther
How do I compensate for this code is there somewhere too look and change things

thanks

Jim

[SSBerserker]

hey guys
Got finishsed tunning this 98 a4 vette
on the dyno things went well no codes any of that just power
Customer drives off the lot and gets a P1514 code and reduced engine power
this is something to do with the throttle body and maff flow rate I gasther
How do I compensate for this code is there somewhere too look and change things

thanks

Jim

P1514 has to do with the extra air flow you are seeing from the procharger. It is an easy fix, and one that needs to be done for any forced induction.

Go to engine diagnostics -> calculated airflow vs tps vs rpm -- P1514 table.

To fix the problem you need to calculate the pressure ratio for the procharger.

PR = (14.7 + boost psi)/14.7

Then just scale the entire table by the PR.

You probably also need to fix the P0101 table or he will throw that code at high rpms (delta cylinder flow or something like that).

Just scale that table upwards by a large value. I used 3. I am not sure what scale is good or bad, but 3 worked

Hope it helps!