When running calc.vet what causes an incorrect VE build?

[thunderstruck507]

Several times now on cars other than my Chevelle when I go to run calc.vet the VE table being built is decimals from .8xx-1.xx instead of correct VE values.

My units appear to be correct between PIDs and the logging maps, past that I don't fully understand where to look. I had this problem once when trying to tune my truck because the dynamic air temp pid wasn't supported but now even with a correct calc.dat and calc.b4901 PID set it's doing it again.

Sorry if this sounds vague

[thunderstruck507]

Well it's looking like the issue might just be the VE wanting to be lowered a lot due to the 60lb injectors. I have input all the tables with data from the injector provider though so I did not expect the VE and MAF to be so far off.

Also fighting an issue with the car trying to die, but not the typical surge it just tries to cut off more abruptly. Almost acts like a fuel delivery issue. Should be a problem though since it has a very large pump, corvette regulator, and sumped fuel tank.

Vehicle is a 79 trans am with a 6.0l with 243 heads, 228/232 cam, ls6 intake, and longtubes...nothing drastic.

[joecar]

Post tune file.

What is measured rail pressure...?

Do new injectors flow 60 lb/hr at 43.5 psi...?

Do you have a value for B9021...?

[thunderstruck507]

Post tune file.

What is measured rail pressure...?

Do new injectors flow 60 lb/hr at 43.5 psi...?

Do you have a value for B9021...?

The injectors data they sent me was for 58psi fuel line pressure. (try this: https://blu180.mail.live.com/mail/ViewOfficePreview.aspx?messageid=mg1sC4AbFp5BGl9QA hWtdSng2&folderid=flinbox&attindex=0&cp=-1&attdepth=0&n=63426920
)



He didn't have a schrader valve to hook up my gauge.

Think I found part of the problem though...the fuel rails are aftermarket billet units and are getting insanely hot to the touch and after a few minutes of cool down they stay hotter than the headers. We couldn't even drive long enough to do any useful tuning because the car would die and not restart. I felt around the pump and lines and they are fine all the way to the engine bay. He may have to run a return line from the rails of get a hood with more airflow of some sort.

He is figuring out that mess and getting a port for the fuel pressure gauge before I bother trying to help him sort the tune any more.

[joecar]

Wow, fuel rails absorbing heat from engine bay... what vehicle is this...?

Is his FPR in the engine bay...? If so it must have a return line (regardless of being MAP-referenced or not).

Post pic of engine bay.

[thunderstruck507]

Wow, fuel rails absorbing heat from engine bay... what vehicle is this...?

Is his FPR in the engine bay...? If so it must have a return line (regardless of being MAP-referenced or not).

Post pic of engine bay.

https://fbcdn-sphotos-a-a.akamaihd.net/hphotos-ak-xaf1/v/t1.0-9/10423737_10205308714027042_3185745377684825276_n.j pg?oh=38fae2f9bc82bf91d04cb243c6c44b00&oe=55070002&__gda__=1427646390_2597099be80f99c46b6066a8d0243f2 c

the FPR and pump are mounted near the tank under the car just like mine

[joecar]

Check that the FPR's return line is flowing fuel (back into the tank)(i.e. check that it's not dead-heading).