Power FC Cranking Enrichment

[B-Man]

I understand this setting ajusts fuel enrichment on starting ?

What settings do you use ? Especially interested in knowing from those of you with bigger injectors.

Reason I am asking is, I find that my car is hard to start when it is hot or has been running for a while.

Cold start is fine - it kicks over first pop - no worries - even from dead cold.

But when hot - it takes maybe 3-4 good cranks before it will start. Sometimes I have to leave it for a while.

I guess it might be coil packs or fuel pump - but I doubt it - cause the only thing I have changed recently is the the PFC (replaced from Microtech where it was starting fine)

Any other suggestions ?

Cheers,

[Merli]

Brendan,

My car does the EXACT same thing... Perfect from dead cold, perfect if I start it up again within a few minutes when hot, but if I leave it for a while when hot, it takes 3-4 long cranks to fire up.

I thought it was my Bosch 044 fuel pump, but I dunno anymore... I really need to give Paul (Stace's pit bitch) a call, he said he went through the same troubles with Stace's car, but I haven't gotten around to calling him yet :looney:

Possible factors:

Power FC Pro

GReddy 800cc injectors

Mines AFMs?

Bosch 044 Fuel Pump

Makes it hard because I had so many things changed at once, troubleshooting is going to be a biatch

[B-Man]

FIXED IT ! Woo Hoo

Changed Cranking enrichment from 3.0 ms to 6.0 ms @ 80 degrees

I'm gonna become me a car tuner

[Merli]

I had a look at the Cranking table... Interesting that you can't adjust spark timing, but only injector width?

And what do you reckon the temperature is? Water temp?

[Guest two.06l]

FIXED IT ! Woo Hoo

 

Changed Cranking enrichment from 3.0 ms to 6.0 ms @ 80 degrees

 

 

I'm gonna become me a car tuner

hi guys

we run 4.0ms at 80deg and 7.0ms at 50deg, if thats any help. 720cc injectors are used, but staceys cranking prob was pump feed voltage drop. Merli if any probs call me if you want to discuss further.Paul.....DIRTgarage

[B-Man]

Merli - I reckon it is Water Temp. My PFC doesn't measure Air Temp or Oil Temp.

Oh - and I have 550 cc injectors

[B-Man]

I had a look at the Cranking table... Interesting that you can't adjust spark timing, but only injector width?

Do you mean ignition timimg ?? Cause you can on the timing map - 1st set point is 400 RPM.

Unless you mean something else ??