crank fuel map

Civic Tsi · Post by **Civic Tsi** » Fri Apr 13, 2007 11:38 am

These looks more like RPM values than fuel values. Bug ??

Post by **calvin** » Fri Apr 13, 2007 1:05 pm

it's crank fuel values believe me

Post by **nate** » Fri Apr 13, 2007 1:19 pm

Yes these values are correct. I have had to extensively tweak this table... believe me it works

Civic Tsi · Post by **Civic Tsi** » Fri Apr 13, 2007 2:20 pm

Ok but I won't touch them till I know how they work. Care to explain please ?

Post by **nate** » Fri Apr 13, 2007 2:36 pm

The table is the fuel injected while cranking. Maybe Calvin can elaborate on exactly when this table is active during the cranking routine.

Post by **calvin** » Fri Apr 13, 2007 2:40 pm

Well the ecu looks up this value based on ECT and it's used during CRANK only....

Civic Tsi · Post by **Civic Tsi** » Fri Apr 13, 2007 3:46 pm

What I met is why these values are so high compare to the other tables ?

Post by **Gaskleppie** » Sat Apr 14, 2007 2:06 am

I ones saw an official Honda video about the PGMFI system. I saw 4 injectors in free air injecting incl the start cycle. I can tell you that in the first shot all 4 injectors fired at the same time a huge amount of fuel! Pretty impressive! I do think this was on a obd0 system. This video is very old!

CRX2 · Post by **CRX2** » Sat Apr 14, 2007 6:26 am

Gaskleppie wrote:I ones saw an official Honda video about the PGMFI system. I saw 4 injectors in free air injecting incl the start cycle. I can tell you that in the first shot all 4 injectors fired at the same time a huge amount of fuel! Pretty impressive! I do think this was on a obd0 system. This video is very old!

The video you saw probably was a demonstration tape for dealers. It was from 1992, and was a 1992 model Accord as far as I can remember. I still want to make a copy of it on DVD. When starting, all injectors are fired to improve first start. I think that this was a serious problem for some people. You know Karim, his car never would start when it was warm. They had to make a rolling start with it.... That problem probably could be solved by removing the starter signal to the ECU. I don't know if he tried it. Maybe his problem is solved in another way. I think his car was running with very large injectors and Crome then.