Need a little help, i got a stock bottom end y8 with a z6 head and i have the motor boosted set for 7 psi, problem is that the motor is flooding like crazy. I have a p28 chipped with stock basemap calibrated for 440cc dsm injectors, I have the fuel pressure regulator is set for 45 psi and the motor is dumping fuel like crazy, ive changed the plugs on the motor every 2-3 months, just changed the coolant temp sensor on the cylinder head. The timing was set last year at -3degrees for boost before i put the car away. Now im wondering why its dumping fuel like crazy. Also when i shut off the car when the motor is warmed up it gives me a ultra hard start to the point that if i unplug the injectors on the car it will start then shut off a sec later, then i plug them back on it starts but with a little hard start. Im kinda lost right now what could it be. Anybody with a good idea what it could be please help.......

 

The issue could be anything from the IAT sensor being fubar to an actual mechanical issue.
Another issue could be your basemap. (Doubtful if you got it from us).

I would suggest taking the car to a local honda/acura dyno tuner.

 

i had the same basemap since last year. I purchased all the chipping hardware from you guys. and i had my local tuner installed it. www.innovativetuning.com

 

i checked the iat and everything was good... any other sggestions

 

Do you have a wideband oxygen sensor gauge installed on the car?
If not, you need one to know whats going on.

Is the car throwing any codes?

 

i do have one, at idle it's at 14.9 and at part throttle it goes to 10.2 to 9 something, also yesterday when driving the car started to run extremely lean like (15.9-16.8)

 

Forced Induction Vehicles: 11.2-12.0:1 (Full Throttle)
Partial Throttle/Idle: 15.5:1 (Light Throttle) 14.7-13.6:1 (Partial to Mid Throttle)
There are many small variables involved in targeting your air/fuel ratios, the main idea is to ensure you are not running too rich or lean & making the safest & best power possible due to maintaining a proper amount of fuel to your motor at all times.

 

i always though that 15's were not safe

 

what would i need to burn maps on chips. hardware wise? and what would be the cost of it

 

ur o2 sensor may have went bad. when mine went bad i started to run rich.. hope this helps

 

i just got my o2 sensor not more than 2 weeks ago. I was thinking the same thing

 

anything

 

15's at light throttle is fine. Think about it; while in fuel cut, AFR's can be as lean as 17 - 18 without hurting an engine. High load + lean fuel mixtures = destruction.

 

During fuel cut there's actually no Air/Fuel Ratio (Since there's no fuel and it's all air).

 

If your trying to tune your own vehicle, it would be best to buy a neptune, hondata or ectune system and save the headache of tuning with crome's out dated software using chips etc.