I have a SOHC d16z6, after finishing my install the car is hard to start when cold. I have change spark plugs and lower fuel, any suggestions what it may be?
Set Up:
d16z6 stock bottom end(ARP head bolts and mr gasket head gasket) 7psi
t3/t4b
ngk bk7re .30
3"dp
hondata S100(untuned)
bbk fuel pump
450cc
AEM fpr
greddy type s BOV
rev hard manifild and fmic
AVCR
all kind of guages
nology ignition amp
tial wg
Also running open dp!!! for now

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by booscivic &raquo;</TD></TR><TR><TD CLASS="quote">
hondata S100(untuned)
</TD></TR></TABLE>

that sounds like the problem

 

Nah!!! It started just find at first with time is getting worst

 

1) injectors
2) plugs
3) prolly downpipe (might not have enough back pressure)

just my .02 of what it could be

 

Thanks, Im thinking of changing the gap an lowering fp a little bit more

 

Do you have a good base map? The base map is only used to get you to a tuner or to start the car so you can tune it yourself.

 

the untuned hondata is probably the culprit. things can mysteriously go wrong over time with an untuned ecu. remember...the ecu is constantly making adjustments, and over time, it could adjust itself right out of it's ability to operate.

 

Im waiting to get my 3" exhaust to get it tuned!

 

Anybody else? what amount of fuel pressure should I be running with 7 psi?

 

Im not sure if you mean hard to start when the engine is cold, or hard to start when the temperature outside is very cold. If you talking about outside temp if may be your fuel mixture. In real cold weather, you need alot more fuel to crank the car.

 

maybe I need to raise the fuel? Yes outside temp

 

does hondata support 450's? i didnt think they did.????

 

They can set that base map pretty much how ever they want!!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by booscivic &raquo;</TD></TR><TR><TD CLASS="quote">They can set that base map pretty much how ever they want!!!</TD></TR></TABLE>

So what? I have a feeling you dont believe me on this one. SOOO read the link. Actually sounds very similar to your problem


http://hondata.com/bb/viewtopic.php?t=432


"DSM 450cc injectors will not work with the Honda ECU - the electrical characteristics of the injector are not suited to the ECU, resistor box or no resistor box.

If you use DSM 450cc injectors you will find the engine difficult to start, and the engine running lean at part thottle, plus tuning is very difficult. "
-Hondata

 

^^ that's probably your problem.

 

Anybody else? IT just when the engine is cold