starts then stops

[thatjdmchic]

ok my ca, starts for a second the cuts off.. i have an apexi afc on it. i can read my throttle , air, fuel, and battery volt. i just did the timing belt but all timing marks are matched up correctly .. i got air, fuel and spark.. its really wierd. if she starts up and i press the gas pedal there is no change what so ever. she still proceeds to just shut off. any ideas ?

[sjbsuperman1425]

did u just install the AFC while doing the timing belt?

[thatjdmchic]

no everything has beenon. i just got a wide band today not intstalled yet. heres what had happed . she was driving .. a little rugged b/c she wasnt tuned yet but she was movable.then she started having issues . i noticed timing belt was funky when i was just checking everything so i changed that.. but she starts up beautifully but shuts right back off. i have gone as far as un pluging tps sensor- which caused no change..oddly. apexi reads everything as it should. idk whats going on.timing is correct. apexi reads . she just starts up and shuts right bac off. but no throttle change when she starts and i play with her..

[Frankenfourty]

Have you adjusted your tps correctly? It could be a faulty sensor. Check the FSM to check for the correct voltage on the tps.

[thatjdmchic]

tps is still factory .. i only un pluged it. but the thing is its reading on th apexi. its really weird . the car still rolls over ignites then shuts off.idk wth is going on with her.. shes so b****y. ugh i got a air fuel spark, maf is reading .if i change mafs car wont even ignite. im just all kindas messed up. im dealing with some kids hack job. so htere is no telling. but right now i.ve checked so much i cant find the fault. why would it run one day and not the next. is there anything to do with cold start on these ca's?

[sjbsuperman1425]

CAS adjusted correctly?

[thatjdmchic]

yes i marked all the timing marks on the vehicle when i first got it. then when i did the tming belt i made sure to check and double check everything.

[sjbsuperman1425]

it should fire up regardless if the MAF is connected or not. it sounds like ignition timing to me tho..hopefully a more knowledged member will chime in tho.

[thatjdmchic]

Even if I move it .. it doesn't make much diff. If I set it all the way back it won't even start or all the way forward. In between it starts but shuts off.. -on factory mark.

[fabio240]

what maf are you using and what is your afc set to?

[thatjdmchic]

the maf and afc are the same before this problem came to be was running with the same setup before problem started... but its an apexi neo. Sr20 maf. Not tuned yet b.c of wideband just getting here. It was ghetto tuned blindy. But car ran . I knew the tables and twhere to run it rich and where to run it lean. I really don't think it has to do with my maf or my apexi.... b.c my apexi is reading everything like it should. And the maf reads like it should.

what maf are you using and what is your afc set to?

[fabio240]

play with the in and out settings on the afc Im not sure what the sr is but it should be "?" in and 7 out.... do u have the afc install book?

[fabio240]

try in 5 and out 7 because your using a different maf I know my car sat for 6 months because I was running a z32 maf and didnt have my afc set rite and it would do exactly what yours is doing. Mine would start right up and shut off...

[thatjdmchic]

Yes I ts free printable verison was on their website. And its at 2 in and 7 out right now.... the setting for it haven't changed since I programed it the first time. So I really doubt that's it. Its gotta be something stupid I'm missing. She's go plenty of gas. The ground for the coils are is there... its drivingme insane. All I wanna do is drive.

[fabio240]

It could be the settings I had to play with alot of different ones on my neo just to get it to idle you mite wanna give it a try... and have you checked your spark plugs?

[thatjdmchic]

Yes the spark plugs are all new and correct. It starts just doesn't stay running. It shuts right back off.it ran fine one day and not at all the next... soo weird.

[thatjdmchic]

ok so i been going back over everything . i got spark i got fuel i got air, and perfect timing. i noticed when i yanked my plugs back out again and they are fouled already. pushing to much fuel... hmmmm i know my injectors are working but wondering if maybe they are not pulsing. just dumping . going to check that tomorrow. car was running fine one day not running at all the next. really buggin the shiz out of me. wondering if there is a fuel injector resistor or something that controls the pulsing besides ecu. b/c swapping ecu still has same problem....

any one else think i might be on to something.

[Frankenfourty]

Check your dropping resistor to the injectors. Its a box on the firewall.

[thatjdmchic]

Ok. That's what I was saying.. lol but alright. I got the pictures and wiring for it so I saw it dangling bbehind some stuff.... good job from previous owners wiring job.... nice. I wonder if I blot it back to chassis where it belongs if that will fix the problem..

[Frankenfourty]

Sorry, your post made it seem like you were asking if there was a resistor or not. Just putting it back on your firewall will more than likely not fix your problem though. I say just check it to be sure.

[sjbsuperman1425]

my thought is if it ran before, and now it doesn't, you did something in the process. Go through what you did and look at everything VERY carefully. You might be missing something. this is probably a really dumb problem with an easy solution..happens to me all the time.

[ca18detgabby]

all of your intercooler piping and everything hooked up? IAT sensor, cts, and such all hooked up? (have had alot of people 1/2 a** their car together and try and "hear it run")

I would start by pulling the MAFS and unplugging it. See how it reacts to that. It should bog a tad bit, but should rule out things like Vac leaks and anything to do with the apexi.

I would trip check your timing, timing is 98% of the issues around here.

I would also be checking out your plugs. Few times of failed starts and you are going to have some build up on the plugs. Really not going to help you sort this out in anyway.

may check your fuel pressure, but is a real shot in the dark.

[float_6969]

...I would trip check your timing, timing is 98% of the issues around here...

I hate to say this, but I can't tell you how many times I've heard ppl say that the car ran fine before they changed the timing belt and insist over and over again that the timing belt was fine, but it wasn't.

Set the motor at TDC w/the upper timing belt cover removed and the dots on the cams lined up with the marks on the back cover. Take GOOD pics of the crank pulley lined up with the TDC mark, the intake cam dot lined up with the backing plate mark, and the exhaust cam dot lined up with the backing plate mark.

Until I see that, and am convinced all is Kosher, I don't have much more advice for you.

[thatjdmchic]

Wow... nice.Timing is set to each mark by cam and to mark on engine crank . It was set at tdc. I checked it 5 times just to be certain. But the only reason I changed the belt because the car started acting up. And I'm trying to fix this half a** job its because of ignorant people that have no patients. All the piping is sealed. No leaks. My plugs have been foulin up I got an extra set so I can fix this issue.

I hate to say this, but I can't tell you how many times I've heard ppl say that the car ran fine before they changed the timing belt and insist over and over again that the timing belt was fine, but it wasn't.

Set the motor at TDC w/the upper timing belt cover removed and the dots on the cams lined up with the marks on the back cover. Take GOOD pics of the crank pulley lined up with the TDC mark, the intake cam dot lined up with the backing plate mark, and the exhaust cam dot lined up with the backing plate mark.

Until I see that, and am convinced all is Kosher, I don't have much more advice for you.

.

[float_6969]

Like I said, I've had LOTS of ppl over the last 10 years tell me they had all the marks lined up, and when they sent me a pic of it, it wasn't lined up.

I'm not saying you're marks AREN'T lined up. Changing a timing belt isn't hard to do. It's just really easy to do wrong. It only has to be off 1 tooth on any of the 3 gears and the car won't run right.

I've been down this road before and it's going to be REALLY frustrating trying to help you if the cam timing is off the whole time.

[Frankenfourty]

^^^^I second this. I had a car that I did the timing belt on, made absolute sure everything was lined up correctly, put it back together and it ran like crap. Turns out even though I had everything lined up right, when I let the tensioner go it skipped a tooth. Its really easy to be off by just a little bit.

[thatjdmchic]

ok guys thanks . the first thing i checked over and over and over again was my timing belt. everything lines up the way its supposed to be. and your right its not hard to screw them up. as a chic in this field its funny to watch things be over looked and i thank you guys for nipping my butt about it, but shes lined up not only to marks on engine at tdc but also to the lovely white lines providing by the timing belt itself. heres what i'm looking at.... the resistor for the injectors isnt reading anything on my dmm... it just reads 0. now i'm not an elect. person by any means.. but i know there should be some reading. any thoughts towards this.

[sjbsuperman1425]

your dropping resistor should have some resistance between the power inlet to each of the other wires i believe.

i tried searching the FSM but i couldn't seem to find any testing of the droppping resistor in it or even see it being mentioned.

[thatjdmchic]

my thought is if it ran before, and now it doesn't, you did something in the process. Go through what you did and look at everything VERY carefully. You might be missing something. this is probably a really dumb problem with an easy solution..happens to me all the time.

reason i started fixing the timing belt was because the car wouldnt strt up. breaking it down ...

i had the car running , was waiting for my wide band to come in so i could take it in to have it tuned... went back the next day she wouldnt crank up.. thats when i started looking at the car and fixing things. like the timing belt. -timing was never off.but i always had fuel issues. consumed alot of fuel. and my spark plugs got mad fouled. so i dropped new ones in. but still remains the issue of start and shut off. the plugs were soaked in fuel. i checked the resistor i got no reading on it... its like its open.

[thatjdmchic]

ok thanks i been googling it but i haven't gotten anything either.thanks for all your help you guys on here are awesome sorry if i seem a little sore bout s*** but u know when your rides not working right , your not working right... this has been driving me crazy. but i'm determined to get it to work.. im going to get another resistor tomorrow if this doesnt change then i'm s*** out of luck...i have air fuel and spark and timing i techinically have a running engine but for some reason shes not happy. i pulled the new plugs out that i got yesterday.. and they are dripping fuel after a tried start... on all four cyl. so i'm def looking into the wiring on the injectors..

your dropping resistor should have some resistance between the power inlet to each of the other wires i believe.

i tried searching the FSM but i couldn't seem to find any testing of the droppping resistor in it or even see it being mentioned.