cold and hot start issue....idle problem also...

ejB18c · Post by **ejB18c** » Wed Aug 19, 2009 12:29 pm

i have a b20vtec...and live in The Bahamas..

the car has issues starting when fully cold...when i crank it over i have to give it about 3% throttle to keep it started...

do i just adjust the fuel trim untill it begins to idle well?

I have a hot start problem also....if im driving the car...fully at operating temperature...go to the gas station..turn it off...when i go to restart 2 minutes later...it will NOT start. I need to wait a few minutes and then eventually it will fire up after giving it throttle etc.

Car drives fine...air fuel ratios are fine while cruising and WOT aur fuel ratios are fine.

Just cold and hot start issues. When A/c turns on...car will idle very low and die also.

Thanks alot for any help!

Post by **Spunkster** » Wed Aug 19, 2009 1:14 pm

http://www.hondata.com/forum/viewtopic.php?t=3772

ejB18c · Post by **ejB18c** » Wed Aug 19, 2009 2:05 pm

b20vtec...84.5mm
12.5 compression
b16 pr3 head
skunk2 pro1 cams
98 spec headers
skunk2 intake manifold (original race manifold..old version)
2.5 inch full exhaust no cat
93 octane tune

hondata s300 (p28)

issue was posted above in first post and map is now attached.

thanks

Post by **Spunkster** » Wed Aug 19, 2009 2:47 pm

You still have not posted a datalog showign the problem.

try increasing the cranking fuel trim

ejB18c · Post by **ejB18c** » Wed Aug 19, 2009 4:02 pm

as soon as i start the car it begins to die...in fact i cant even start the car without giving fuel....due to this im having a hard problem datalogging that portion of the issue...

should i keep adding percentage untill i get it to start right?

Post by **Spunkster** » Wed Aug 19, 2009 4:46 pm

You can datalog starting as long as you put it in the on position first and start the datalog.

ejB18c · Post by **ejB18c** » Wed Aug 19, 2009 11:28 pm

i added fuel like you said...about 50% to be exact on cranking. It worked...car turns rite over...yet still wants to die once started...

i will be datalogging startup and also when the AC turns on.

Thank you very much for the help

ejB18c · Post by **ejB18c** » Thu Aug 20, 2009 2:08 pm

i have a quick question...

in the parameters tab...under secondary tables...

in the drop down arrown box...there is an option that says AC switch and then u can adjust idle etc...

will this help with AC idle?

Post by **Spunkster** » Thu Aug 20, 2009 3:06 pm

No, the secondary tables have nothing to do with idle when tha AC is turned on. It actually sounds like more tuning needs to be done with this car to get it to run properly.

ejB18c · Post by **ejB18c** » Fri Aug 21, 2009 3:10 pm

honestly...the car under partial throttle and driving shows perfect air fuel and drives smoothly.

like i said...i corrected the initial cold start up issue with adding 50% in the cranking fuel. yet still when the car is hot i have issues starting. I am going to look at the coolant temp when the car fully warms up and add more correction at that point...so that when i start...it will hopefully help with the hot start issue..

in regards to the A/C...i got it to idle...yet it is very weird...out of 5 times i turn on the A/C 3 times it will idle nicely at 14.0 and 2 times it will just dip into low rpms and die.

im very confused