the colder it is the harder it is to start

[killablue240]

i had thought about it not getting enough fuel but disregarded it since my fuel pump costs 300.00 dollars and its not very old. but i think i will try pouring gas into the engine. now i just have to wait for cold weather, its like 85 degrees here!

[1.8TS13]

i used to have cold-start problems with mine too ( yes i know its a ca but oh well)if your running an atmospherically vented bov, make sure the spring is very tight....unless ur running huge boost it wont really matter..and when people talk about the iacv as a solution.. they dont mean turning the screw.. take the whole piece off and clean all the gunk out of there with some wd40.. it worked wonders on my motor.. mine starts up great in cold weather and idles like a champ!good luck

[Mistaken]

Im running a walbro 255. I left the vacuum canister off those lines that go back to the fuel tank. Think that might be the problem?

[slivic]

I have an S14 with a redtop and I had the same problem, I eventually took it to a shop and they were able to get it to start cold, but then it wouldn't start hot. There is a wire that has to be connected for cold start and disconnected for hot start or the other way around. I have not driven the car in a while. I am supposed to work on it this weekend. I will figure out where that wire goes to and post that to see if it helps.

[240sxbobbis]

ok i have a ca18det motor and it does the same thing when its cold god damit its a pain but i did some searching and it can be your plugs what plugs do u guys run in the srs right now i have ngk copper something lol im changing it to bosch platinum iridum lus and ill see how it goes then on

[killablue240]

hey slivic let me know what wires were played with im very interested

[slivic]

I should be playing with it tomorrow. I will let you know.

[slivic]

Ok so the wire in the engine bay, that I have to have connected to cold start and disconnected to hot start, is the start signal wire. Now the question is why?

[Mistaken]

Pictures of the wiring?

[pampadori]

the orange wire on the cluster plug is the cause of your problem. here is how it works.

when you crank your starter, the maf voltage, and every other voltage is very low because the starter is taking all available juice to crank. so the computer has to be told that all sensors are reading low and sending signals that are lower then they actually are. this orange wire goes from the ignition switch to the ecu via that orange wire. it only has voltage when the key is activating the starter. check that wire with a voltmeter while your pissed off girlfriend/wife cranks the engine. if you got nothing, fix it! on s13 chassis it hooks up to....wait for it....the orange wire! not sure about s14 chassis, i only did one swap on a s14 and i can't remember.

[slivic]

Shawn,

Jason or one of the other guys ran a wire directly from the starter plug to the orange wire on the ecu. Should there be another connection somewhere?

Josh

[killablue240]

thanks for the info pampadori, i think that i have solved the problem but i will let you guys know tommorrow after i try to cold start it.

[pampadori]

slivic, you have a n s14 right? the wire is somewhere on that f3 plug in the passenger foot area.

[killablue240]

hey pampadori you wouldnt know what number the pin is on the ecu would you?

[slivic]

Shawn, yes it is an s14. The wire I am looking for in the f3 plug, is it a start signal wire or is it called something else?

killablue240, it is pin 34 on the ecu.

[pampadori]

it is usually called the start signal in the FSMs. [QUOTE=slivic]Shawn, yes it is an s14. The wire I am looking for in the f3 plug, is it a start signal wire or is it called something else?

killablue240, it is pin 34 on the ecu.[/QUOTE

[killablue240]

thanks pampadori problem solved, i ran a wire from the ecu pin 34 to the ignition switch with a push button switch on it so i just press the button to cold start and it starts right up, thanks a lot.

[slivic]

Glad to hear it worked out! I was going to run a switch myself, but I would rather not if I can help it.

Shawn, last stupid question. If I connect the wire from the f3 plug, do I "T" into the wire from the ecu going to the starter?
Modified by slivic at 4:23 PM 4/2/2007

[S13FASTBACKSR]

so you only hit that button when you are starting the engine cold? and when its warm you turn the key?

[killablue240]

yup when its warm the engine starts right up, so i only use it when the engine is cold.

[S13FASTBACKSR]

interesting..so that orange wire just ends up going bad after some time? probably will happen to a majority of us sooner or later?

[killablue240]

i think mine was just not hooked up to the right place, it was getting almost no voltage while cranking.

[pampadori]

no, i suggest tracing the orange wire on f3 all the way up to the ignition switch in the steering column. make sure it has continuity. then make sure its going to the dash plug (orange wire) on the sr harness. [QUOTE=slivic]Glad to hear it worked out! I was going to run a switch myself, but I would rather not if I can help it.

Shawn, last stupid question. If I connect the wire from the f3 plug, do I "T" into the wire from the ecu going to the starter?

Modified by slivic at 4:23 PM 4/2/2007[/QUOTE

[Mistaken]

Someone want to make a guide about this, or post up a few pictures. This seems like a pretty common problem that everyone has.