cut and pasted from hondatas web site.
i will email you the cal if need be unless you are a member on hondatas forum, and it is there.

thankyou for taking the time.
at world cup finals, this issue really reared its ugly head. last year it cropped up at e town. cost me the furst round at the fall nationals.

when im in the lanes, and there is a breakage, i cant turn the car off, as i know it wont restart. BUT, with 2+2 it will start and run.

well this weekend, i had an issue, and thought it was lack of battery voltage. we put the jump box on the car it fired. made the pass.

next round same deal. breakage, had to turn car off, this time the jump box had no effect. so an idea popped into my head to pinch off the return line as i know the car never floods, it is lack of fuel. pinching the return line allowed the car to light up and run.

the setup is as follows,
83mm gsr maz cams
8.8:1
t3t67ho
rc 2100's with an oe resistor box
weldon db2015a on a dedicated switch so cranking fuel pressure isnt an issue.
msd 6al and blaster ss, plugs gapped at 18thou.

i am pretty convinced that i need a warm start fuel enrichment, problem is, im not a tuner. i can make changes, but dont feel comfortable making changes i dont know about.

so if the cal agrees what what i am saying, please direct me as to where to add fuel. and what incriments. thankyou.

i will enclose the last cal i used.

thanks guys.

 

Have you checked/or swapped out the usual suspects ?

Main Relay
Coil
Ignitor
MSD AL

The above seem to start playing games as they begin to fail. Pinching the return line sounds odd, all that will do is increase the rail pressure a bit.. maybe it was just coincidence ?

 

it has spark, it is definately getting fuel. because as soon as it lights, it runs.
the fuel pump is on a dedicated switch, so it is on all the time, it will start off of ether and 2+2, and run.

just a thought we pinched the return line raising the hell out of the fuel pressure, and it will start.

to me seems like it needs hot start fuel enrichment, its definately not getting enough fuel on a hot start. sometimes, rapidly cycling the key to initially pulse the injectors, it till fire but never enough to keep running.

when this first happened, i thought it was flooded, but the plugs are always dry.

 

Sounds like the cranking trim needs changed under the fuel trim tab. Larger injectors often necessitate changes to cranking trim and post fuel or the car won't start when it's warm. Your cold start parameters generally seem to allow the motor to start regardless, but once warm that's when I've had to make changes in order to get a car to restart.

Ether...man, what you think this is a carb'd V8? If injected cars don't start you need to fix the problem.

 

ether was actually hypothetical. 2+2 worked fine. its what chad had in his trailer at etown.

trust me i am not that much of a hacker. hahaa. well not with my own car anyway.

i said that just to get the point across.

BUT there is no cranking fuel trim in s300. apparently there is in flash and k pro but not s300.

 

under fuel trim option in parameters there is a cranking fuel trim.

 

touche, should have added no cranking fuel trim vs temperature table hahaa.

i am at 12% now, will i have a flooding issue when cold? if say i go to 24%

or how much higher should i go?

 

id try 15-20. i wouldnt think you would have flooding issues, ts a very brief amount of time ur using the cranking trim. whats ur post start fuel at. maybe try altering that. majority of cars ive seen. never needed to much adjustment in those 2 options

 

post start is 0%. once it fires it is all good. it is getting fuel into the engine is the issue.

ill mess around with that later, i got a broke trans to deal with too.

thanks for all the replies guys.

 

I had the same problem with a car recently running the S300. For some reason and I triple checked all my correction tables. When the car would get over 160* ECT. The ecu would pull 100% fuel for the IAT and ECT Corrections. I have no clue why it was doing this. But too fix the problem I just added 100% too startup correction and the problem went away. We had checked everything else. I dont know whether it was a software or hardware problem. But the same ECU setup was in 2 different chassis and the problem still persisted. Check the IAT.c and ECT.c when the car is cranking when warm. Also take note of the coolant temp.

Also what version of the SManager software are you running? This was on version 1.4.2.0 if that may have anything to do with it.

 

yeah that makes perfect sense. and i am atleast version 1.4.3 if not 1.4.4

again thankyou everyone.

 

thankyou for all the help. i dragged the car out of the garage tonight, and messed with the cranking fuel trim.
12% wouldnt start. 50% would start.
so i think i got it nailed.
but here is another question, will putting the cranking trim at 50% affect cold start adversely?

 

It did a little as the car would start and stall on cold starts. But with the way the fuel trims are setup its the only way I was able to get it too start once warmed up. Its sorta a give take thing I guess. Which you would think it wouldnt have to be.