Sounds good... one thing I noticed is if you're misfiring or stumbling on a cold start, it's almost always due to a VERY lean condition. You can be nasty pig rich on a cold start without much fuss.

 

bringing back this old thread. those that have had issues with hot start on a osiris tune - did you ever check your plugs to see if they were pretty damp? if so what were the results? my car is having this basically this hot start issue and i want to rule out any other possibilities as the cause.

 

Pulling the plugs after cranking to check the plugs would be a waste of time.

If you want to see if it is rich on cranking then hard wire 12v to the widebands so they stay on and do not reset when cranking. Then you can see a solid a/f during cranking.

The simplest thing is trial by error. Reduce fuel in those cells and test. Repeat. If it gets worse then that's not the issue.

 

Have someone stand behind the car on a sunny day when you start it. If there's dark smoke puff when it fires up (or stumbles) you're way rich.

 

thanks for the replies guys. fairly sure tuner has it figured out. car pretty much fires right up now, but i do need to give it a little gas when starting it. car has built motor with 300 miles on it, aps twins, cjm stage 2 fuel system, 830cc deatchwerks injectors, and bc 272 cams. i do get some white smoke...not dark like you mention djamps.

 

you are not giving it gas when its cranking, you are leaning it out by opening the throttle body

 

so with that being said, should i be asking the tuner to adjust the appropriate tables to decrease fueling at startup?

 

Your tuner should know if he should adjust those tables or not given the symptoms/conditions you may have. Who's your tuner if you don't mind me asking?

 

project x is doing all the work. i have the car now and am putting break in miles on the motor and they are doing the rest of the tune friday. ill be sure to mention to him the couple small symptoms the car is having, hopefully he can get it sorted friday.

 

Probably a stupid question but Im going to ask it anyways. I am currently in this situation on the cranking enrichment values being too high so I'm going to play around with the values to see if it will help.

My situation is I tuned my 350 using the rom editor, saved the rom files and flashed them to the ecu then I tuned the car using cipher and saved the files which are RTT files. The car is currently dialed in perfectly except for the hot start issue.

My question is, if I go into the rom editor, change the values that I want, save the file, then flash the ecu, will it affect the RTT file that I edited and saved via cipher?

Am I correct in saying theres 2 different files uploaded to the ecu? The ROM file and RTT file?