racingdragracer

I have a motor and chip that has ran flawless until now.

The only change is a cam. I know that this is a big change though.

1227730 ecm
custom chip
holley 4bbl intake
4150 msd throttle body
24# injectors
edelbrock rpm heads
11to 1 comp.
355 motor
cam 114ls dur @ .050 224 230

new cam
112ls dur @ .050 230 238

Car will run if you pour gas down the throttle body.
It will run until you cut it off.
no problems

BUT
When you go to crank it any, it won't run without pouring gas in it.

What do I change in the chip and how much.

I have ignition fire, I have power to the injectors on both wires while cranking. I have changed distributors to get another pickup coil. I am lost.I am thinking you can richen fuel up for startup, Don't really know?

Thanks,
Justen

Kevin91Z

Do you have a fuel pressure gauge? Make sure you are getting at least 40psi, otherwise you arent getting enough fuel. Your fuel pump or regulator may have died.

There is a startup fuel enrichment table in the chip. One vs MAP sensor and one vs Coolant Temp. Increase those.

racingdragracer

I have 50# of fuel pressure. It is a new pump. I am using tuner pro.

Rice Killer87

I know nothing about tuning, but what Kevin said needs to be done. Sounds like its not getting enough fuel during cranking to fire off.

Whats the base timing set at? Have you tried advancing/retarding it at all?

racingdragracer

I found my problem. The TPS sensor was wired wrong and would not let the injectors fire.