I FIGURED I WOULD GET A GOOD RESPONSE HERE.

MY CAR IS A PT88 5.3 STOCK LS2 CAM, 112LB INJECTORS, 60PSI BASE PRESSURE, E85. 4FT 3.5 PIPE OUT THE FRONT BUMPER.
THE CAR WILL START FINE WHEN COLD BUT ONCE YOU GET IT UP TO TEMP THE CAR WILL BACK FIRE, AND I MEAN ITS A LOAD BACK FIRE, AS SOON AS IT DOES THAT, LET OF THE KEY AND HIT IT AGAIN AND BOOM FIRES RIGHT UP 90% OF THE TIME.

i HAVE TRIED LEANING THE CRANKING FUEL TO THE POINT THE WIDEBAND WILL GO DOTS AS IT CRANKS, AND HAVE ADDED ENOUGH THAT THE WIDE BAND GOES 10.0 AND EVERYTHING IN BETWEEN.

GETTING TO THE POINT ITS KILLING MY LIL BATTERY AND HAS LEFT ME STRANDED, ANY ADVICE ON THIS E85 WHEN HOT.
NO WAY TO POST THE TUNE AS OF NOW

 

 

So the car starts when cold, once it warms up it back fires? Does it quit when it backfires? Or does it run fine when hot and only back fire when trying to start it hot? Does it start then back fire? Where is your wide band located? How close to the end of the down pipe? Sorry for all the questions but I had a hard time understanding what the car is doing from your first post.

 

lmfao!!!

 

car runs fine once it starts hot or cold.
the car will start fine every time up to about 100DEG ECT.
but anything over 100deg the car will back fire when cranking
back fires once, let off the key, then crank boom fires almost every time

wb sensor is 2ft from the end of the pipe

 

Unburnt fuel in the exhaust. If you have already played with the cranking fuel it may be left over fuel from shut down. I just have no idea how or why. What is your coolant temp enrichment adding at that temp? My car starts fine with e85 at any temp.

 

0 BEEN setting things all week trying to get this thing to restart after shut down, I think it needs more fuel as the head is hot/evap. the fuel before it geys to the cylinder but when i add fuel it either has no effect or it drowns the engine

 

should i bump timing its at 14deg at crank?

 

what are your IAT sensor adders like? maybe it's getting heat soaked

 

Do you have an LS2 front cover and sensor on it? If not, the LS2 cam doesnt have a reluctor in back and will cause a no cam signal condition that will cause those symtoms.

 

I do not have the sensor on the front cover.
Just turned of the code in the tune, thanks for the reply

 

Might try to get ahold of pwrtrip75. He had starting issues with E85 as well.

 

messed with the tune all weekend at kc2k and it hits almost every time with out the loud back fire.
just a lil fine tuning should be good.