Another starting issue, And yes iv searched.

[Morgs]

Ok heres the prob, when i get out to my car in the morning it doesnt want to start, it chugs and chugs, catches a little, and then dies, i try again, a little more chugging and it catchs a little more then dies, i try again with the peddle mashed and it finaly chugs chugs and catches. then it jumps to 2000 rpm and slowly settles.

Iv tried the iacv option, cleaned it reinstalled, no difference.

checked timing, its at 15* top dead center

i have spark

i have fuel pressure

Heres some more info, when its colder outside, it gets WAY worse, when its warm out the issue isnt as bad, it will start with some coaxing

after the cars been driven for a while if i turn it off and back on it starts right away.

so my question is how do i fix this? what im thinking right now is that it has something to do with the temp sensor that feeds the ecu, perhaps its junk and the ecu doesnt get what temp it is and doesnt adjust fuel and spark and whatever accordingly? does that make any sense? Im still learning the wrenching part so it may not make sense.

so IF that could be the case, i need an ecu temp sensor, i have heard that a KA one works for the sr. not sure if this is true or not but if someone could confirm this fact i would greatly appreciate it.

I also havnt touched the cas, as it was in another car and worked just fine i crashed the car, swapped it to a new chassis and now starting issues. so yeah, if someones got ideas PLEASE help, i would greatly appreciate it.

oh ya, and im runnin a stock sr, stock boost, stock sidemount, only iv done is a turbo timer, gauges, 3 inch exhause and 3 inch down pipe.

Any help i would greatly appreciate it!

Morgs

[onecrazyfoo4u]

Dude, I have the exact same problem as you....and I mean exact same. I don't know what the deal is either, car runs perfect once it's warmed up and if I go to start it after only sitting for a little while. It's just cold starts, and gets better the warmer it is out in the morning.

Same mods, 3" all the way, stock redtop other then a greddy rs bov and smic.

I bought a new coolant temp sensor, cause that's what I also suspected, but haven't put it in yet...hopefully this weekend. I got it from frsport.com , and I'll let you know if it fixes the problem. It better, cause I don't know what else it could be?

btw, I just pulled codes on my #62 ecu, and it showed a 33 and 34, which is knock sensor and o2 sensor....don't think this would affect a cold start problem though? We've got to figure this out man!

[Morgs]

man, sucks dont it? Lemme know how it goes and good luck cuz if that fixes ur issue then hoepfully mine too!!!!!

that reminds me i should figure out how to pull codes LOL and check em.

keep me updated man!

im gonna mess around with it more tomorrow so hopefully this weekend we come up with something!

[onecrazyfoo4u]

yeah, I'll try to get my coolant changed and do the sensor this weekend, and I'll def. let you know if it fixes it pronto.

As for pulling codes, follow these 2 threads, basically the same, just one is more in depth and has the lists of codes:

zerothread/26523http://www.240sx.org/faq/artic...h.htm

Anybody else chime in that's having these same problems!!!

[Morgs]

hey thanks man, ill check my codes tomorrow and see if im getting the same codes as you

[Morgs]

hey any luck dude?
Modified by Morgs at 12:30 PM 6/10/2007

[onecrazyfoo4u]

Nah, I had to go out of town, I won't get to change till sometime this week. Probably wednesday for sure, I'll let you know!

[onecrazyfoo4u]

Well, changed out everything in the cooling system, including the sensor. Didn't change a thing, still have the crappy cold engine starts. But now my car is overheating constantly, which is nice....i think it's the gauge though.

I almost think it's a blown headgasket that's giving us problems. That was the problem with my last car, and it had really crappy cold starts too. I'm gonna pull the plugs and check, if that isn't it I really don't know what to think is next?!

[onecrazyfoo4u]

Checked the plugs a couple times before starting up in the morning....no coolant whatsoever in the chambers or on the spark plugs. So it's not a HG problem, at least for me. Any update on your hard starts? Did you try anything to get it fixed yet? Let me know.

[doridori23]

Did you change out the two wire sensor for the ECM or a one wire ground reference sender for the gauge? Normally with this issue i see the temp sending units bugging out. If you have a small crack in the head gasket you might have difficulty starting (little compression) however once you warm up the metals have expanded and sealed the crack a little. It is rare to have one so small but it is in the realm of possibility.

Has either one of you guys had work done right before the problem started?

[onecrazyfoo4u]

I changed out the 2-wire cts for the ecu. The 1 wire just controls the gauge, which I think is going out anyways, so I ordered a new water temp gauge to see what temps I'm really running at. When I was researching it all, everything pointed to the temperature sensor. But it didn't seem to fix or help the problem at all.

When a pulled codes a couple weeks ago, it showed an o2 sensor code and a knock sensor code. But I dont think either of these would affect how crappy the car started up, now would it? I need to pull codes again, to see whats up.

No, I haven't had any work done that's affected the startups, they got slightly better when I replaced the fuel pump with a walbro, but they're still crappy startups.

[Morgs]

no work done recently either, however like u said once its warmed up it starts just fine.....

i havnt tried replacing the temp sensor that feeds the ecu yet, i may try it and see, i need to get this fixed

[Morgs]

still no solution to this as of yet, here are some things iv changed,

FPRpumpfiltercleaned IACVhavnt changed the temp sensor yet though

anyone? any ideas?

[blinker_fluid]

Just a thought but your MAF maybe getting tired. It sends signals based on the heat reduction of the wire inside it. After sitting all night its cold and has a hard time getting back to operating temp. Try leaving the key in the on position for a while before you crank the motor, probly isn't it but worth a try.

[Rikter]

A thought. Take it into a shop to get it diagnosed instead fo spending all this $$$ on parts that aren't fixing your probs?-Rik

[Morgs]

if there was a shop around here that knew anything about the motor and would even work on it i would....

[onecrazyfoo4u]

I FINALLY fixed my cold starts a few weeks ago. Trust me, this has to be the same problem as you, same exact symptoms. Go pull out your ecu and find the 'starter signal wire', it's a solid orange wire, #34. When you turnt he key to 'acc' or 'on' you should see +12 V at that wire, so check that first.

If you don't have 12V, like my problem, then the wire isn't hooked up. It's supposed to hook up somewhere by the ignition column. But I looked and looked and didn't see a single orange wire there. So I just wired mine into a 2-wire on/off switch. So when I need to start it cold, flip the switch on and it fires right up, then I turn the switch off.

Trust me, it starts perfectly now, let me know if you need anymore help!

[Morgs]

dude unreal, your the man, and that was EXACTLY my problem!!!!! thanks so much man iv been chasing my tail for a year workin on this thing replacing this and that, now it starts like a well like pure awesomeness.

thanks man!

[onecrazyfoo4u]

Sweetness, that's awesome. Yeah, I've been dealing with mine for almost a year too. One night it pissed me off so I got an every forum and did some major searching.....that seems to be a common problem with redtop swaps in S14's. So your wire was completely dead too? Were you able to find where to hook it up on the ignition switch, or did you just wire it to a button like me?

Always glad to help out a fellow nissan enthusiast!

[Morgs]

no i havnt been able to just reconnect it so im gonna do what you did with the switch

cant believe thats what it was, i didnt find anyone refering to it in their no start threads, first time iv heard about it was on here and my thread on ziptied, i was like wtf

again thanks alot man, now i ca n move on with **** and not be all paranoid about a starting issue