Cold Start Problems help KA-T gods!

[beatd]

Guys i just upgrade my turbo to a s14 t28 and the weather is really cold now. I'm having problems starting my car after leaving it overnight. I would need to crank while pushing the gas pedal down to get it to start the first time for the day. trust me its hard to get it to start for the first time but after it starts it will start like a champ every time. The problem is just the very first start of the day. also after the car is on the vacuum is at 20 on the boost gauge so its not a vac leak.

My TPS voltage is 0.49v, all new battery, dizzy cap & rotor, ngk blue wires, ngk bkr7es plugs.

Could it be the coolant temp sensor? Would a bad o2 sensor cause it to have cold start problems?

Please help!

[DevilMB3017]

What are you using for fuel management?

Is your battery relocated in your trunk?

Have you double checked all your ground wires?

[beatd]

i'm currently running emance rom tune with safc for fine tuning. n60, sr s14 t28, walbro 255, 370cc, stock fpr.

yes the battery is in the trunk, but it was in the trunk before and it would start fine over the summer.

could it also be because i bypassed and i used the coolant runners under the throttle body for the waterlines for the turbo?

i'll double check the all grounding wires tonight

Please help!

[kouki_hmongster]

i'm currently running emance rom tune with safc for fine tuning. n60, sr s14 t28, walbro 255, 370cc, stock fpr.

yes the battery is in the trunk, but it was in the trunk before and it would start fine over the summer.

could it also be because i bypassed and i used the coolant runners under the throttle body for the waterlines for the turbo?

i'll double check the all grounding wires tonight

Please help!

could be the coolant temp sensor, it's really cheap so you can go buy it at autozone or something. if that doesnt help then it could be something else. i remember when i use to have emance ecu i would get cold starting problem.

i would have to give it a few tries and then hold the gas pedal until the car warms up a bit then it would run like normal. only happens on cold morning start. I think the reason why i had starting problem was because i told jason that i have stalling problem w/ open bov, so he messed with the ecu and i think thats the reason why. this started from day one when i installed emance into the car.

[beatd]

could be the coolant temp sensor, it's really cheap so you can go buy it at autozone or something. if that doesnt help then it could be something else. i remember when i use to have emance ecu i would get cold starting problem.

i would have to give it a few tries and then hold the gas pedal until the car warms up a bit then it would run like normal. only happens on cold morning start. I think the reason why i had starting problem was because i told jason that i have stalling problem w/ open bov, so he messed with the ecu and i think thats the reason why. this started from day one when i installed emance into the car.

I replaced the coolant temp sensor and cleaned the iacv hopefully when i get home form work and try to start it today it would work. i was thinking it was the ecu too but i've hoping its not.

[DevilMB3017]

It is possible its the coolant lines, because they warm up the incoming air charge to operating temps quicker, but I doubt it because it has been *that* cold here in NJ. I also doubt that would make it hard to start.

But with the track record Emance has right now...

[beatd]

i hope its not the ecu. i want to do a hard reset on the ecu by draining the electricity and see if the ecu will self learn the new coolant temp sensor and iacv being cleaned.

[beatd]

i hope its not the ecu. i want to do a hard reset on the ecu by draining the electricity and see if the ecu will self learn the new coolant temp sensor and iacv being cleaned.

over the weekend i tried ^^ but it didn't work. i'm still having cold start problems. if anybody has any suggestions i would greatly appreciate it. i don't know what else to try.

[martins_240sx]

fuel pressure regulator

[Razi]

Clogged fuel filter?

[beatd]

i spoke with jason and he said it was the ecu tune because it was tuned for SO-CAL temps not NJ temps so he's sending me a revised cold map for my needs for FREE. thanks for your all help guys

[DevilMB3017]

Wow. It's nice that you got ahold of Jason. That seems to a rare thing these days.

Also, why didn't he take that into account at first?

One of the first things I was asked by an ECU tuner was the usual ambient temps I was expecting...

[beatd]

i

Wow. It's nice that you got ahold of Jason. That seems to a rare thing these days.

Also, why didn't he take that into account at first?

One of the first things I was asked by an ECU tuner was the usual ambient temps I was expecting...

i'm not sure but as long as i get the revised tune and it works i'll be happy. i'm going to try to start my car and see if it works because today here in NJ the temps are 50s. hopefully it will start on the first try.

[kouki_hmongster]

i

i'm not sure but as long as i get the revised tune and it works i'll be happy. i'm going to try to start my car and see if it works because today here in NJ the temps are 50s. hopefully it will start on the first try.

I knew it.....well good thing you got a hold of him, one of my friend received a new tune that he didnt ask for and it fixed his rich condition but still not the best.

this is why after blowing a motor w/ emance i just gave up and got enthalpy, wideband etc... now i'm not taking shortcuts.

[beatd]

I knew it.....well good thing you got a hold of him, one of my friend received a new tune that he didnt ask for and it fixed his rich condition but still not the best.

this is why after blowing a motor w/ emance i just gave up and got enthalpy, wideband etc... now i'm not taking shortcuts.

yea hopefully he'll be finished revising the tune soon and get it to me. i wanna drive my car without having to keep cranking like a champ to get it to start for the first time of the day.

btw i tried to start it today since it was 50s but no good still took me awhile since it was over night. If the revised tune doesn't fix the problem i'll just go with calum real time ecus

[zerepdivad]

wow you actually got ahold of that jackass..... tell him screw you from everyone he screwed over and stopped responding to on nico and ka-t.org.......

BTW my car had the same problem and i'm in wisconsin. never once would stay running on it's own from cold starts.

[DRIFTERSWANTED]

He probably stopped responding because everyone that tried to turbo there ka blamed him for every and any problem they had. Leaky injectors , bad mafs and boost leaks just to name a few. I don't know that well but i had nothing but good dealings with him.

p.s.

Try holding down the gas pedal and cranking. You may have a leaky injector. that overnight is flooding you out as it sits because the cold shrinks up the o-rings.

What kind of readings are you getting on your wideband?

[kouki_hmongster]

since you know soooo much about everyones situation why wont you explain mine. this is what happened, i got my car dyno tuned w/ just afcneo and retard timing from distributor, made good power and started every morning easily. the guy from dyno didnt do a good job w/ my low throttle tune which caused my car to eat up a lot of gas. so i heard emance was suppose to help save gas while off boost. so i bought it and he installed the chip in himself, the first start i had to press the gas down and hold idle until it warm up then it would run. WTF explain that.... thought it was only first time w/ emance so i ran it for a week and every morning same cold start problem plus i f**ken have a fuel pressure gague that show i didnt have leaky injectors.

the problem started from day one of emance ecu and only last for a week since it blew. WTF since you think you know so much why wont you fix that problem. i had a friend who got a retune out of the blue, he had rich asss conditions and yes the first time was leaky injectors but i walked him through and we fixed the problem and costed him soo much oil. finally the new tune got there and ran better but still rich points. WTF smart F***k why wont you explain this and fix. would you trust a guy that blew soo many motor and made soo many people lost hope of going ka-t.

[DRIFTERSWANTED]

I am sorry that you had problems and your friend had exactly one of the problems i said some people have with going ka-t.

1. you got a tune that you were not happy with (why did you leave the dyno)

2. no tune after getting emance tune ecu

3. running wideband? (what afr when you blew)

4. fuel pressure gauge want show injectors leaking when engine is off

Sorry you got all but hurt about my comment. I was not trying to attack you just state how i felt about things. Everybody wants to bash people on the internet or join the bandwagon. People always have friends or know someone that had a bad exsperance or never tell the whole story. Slapping a turbo on a n/a motor that most likley had 100,000 miles is easy but getting it to run and not blow up takes a little work.

[beatd]

ok it turns out the new tune still didn't fix my problem. i was wondering if its because i was running colder plugs? do you think putting the stock plugs in would help? any one with a suggestion is welcome to chime in please i'm out of options

[johnnyappleseed]

the fsm ays in cold you should push half the pedal down

[PapaSmurf2k3]

I have colder plugs in my car and it has no problems starting up in the cold. Does it smell like fuel when you are cranking? Have you tried turning the key to ON and letting the fuel pump do its thing for a few seconds before cranking?

[beatd]

I have colder plugs in my car and it has no problems starting up in the cold. Does it smell like fuel when you are cranking? Have you tried turning the key to ON and letting the fuel pump do its thing for a few seconds before cranking?

I have tried priming the fuel pump before cranking and it still start up line normal when its warm. My tuner said he cut off alot of fuel for the cold start. However before i got the new tune it did smell like alot of fuel but now it doesn't.

the fsm ays in cold you should push half the pedal down

where in the fsm did you read this?

[johnnyappleseed]

sorry didnt mean to say fsm i meant chiltons

[oz240red]

Hope you find the problem soon man.

I asked my brother who is a mechanic by profession and he told me a couple of suggestions, maybe they can help you narrow down the issue:

1- The fuel pump might be losing pressure overnight, the initial spray of the injectors the first time of the day is weak when you push the pedal, the extra gas compensates for that and the car will turn on. Each subsequent time, there is enough pressure on the lines to give you a strong initial spray.

2- Too much fuel due to leaky injectors that have dripped overnight. When you do Wide Open Throttle, more air comes in so when the right mixture happens the car starts.

Both issues could be happening at the same time. You could try changing the o-rings on all the injectors just to rule that possibility out.

Good luck man

BTW, thanks for asking this question, this made me learn something new.