Help! R33 Gtst Only Starts With Accelerator, Drives Fine.

[tcplaya3]

i have a series 1 r33 gtst. all stock except for intake. even stock exhaust.

problem:

-skyline has trouble starting. and only starts by pumping the accelerator while cranking.

it will take about 3-4 cranks. it starts very slowly, then rpms shoot to about 1700 and immediately come back down to about 900. idles perfectly fine.

-also, as soon at it starts theres a sharp squeel from the belt, i think the alternator belt.

-theres also a wierd 'kuuuuurrrrk' noise from inside the engine bay, not exactly sure what it is, but it only happens after the cranks that dont start the car (the first 2-3 cranks).

-there are also backfires during the start-up, nothing crazy tho.

changed spark plugs.

new battery.

cleaned aac valve. (idles nicer now, but same starting issue)

once started, the car idles perfectly fine, and drives really good. smooth. at a stop, continues to idle fine. no stuttering or anything. never died on me. but once i turn it off, i will again need to use the accelerator to start it, but it usually starts 1-2 cranks, although still a bit laggy. if i leave the skyline for a couple hours or more, then same original problem.

i took some videos as well, i can email them if requested.

ive done alot of reserach, countless hours. people that seem to be having this issue also have problems keeping the car running, where it will die at a stop etc etc. however, my car runs perfect, only has starting issue.

if anyone can help, id really appreciate it!

thanks!

[mad082]

what happens if you let the fuel pump prime before you try and start the car?

might be worth changing the fuel filter.

other possible issues are the CAS, AFM, intake leak. another plausible cause is the cold start valve (linked to the AAC, but down under the intake manifold). or simply that your fuel pump is on it's way out. putting it on a dyno would help rule that one out.

[tcplaya3]

ive let the fuel pump prime, doesnt help. but i still need to pump the accelerator or else the car will keep crankning and rpms wont rise at all.

i dont understand why the car idles/runs fine, but on start up its very very laggy.

wouldn't the CAS, AFM or an intake leak also cause the skyline to not run properly? others that have had issues with these parts also complained about running rough, stuttering, dying while idling, etc.

if i HAVE to pump the acceelerator while cranking, could the issue still be electrical? or would it be mechanical??

thanks for your help

[mad082]

may be an issue with the TPS (or where it's set) as well. and the car may run ok, but that may not rule out there being an issue with one of those things. they may just be within the range of tollerance when running, but not starting.

may also be an issue with fuel pressure.

maybe try doing a fault code check on the ecu. worst case scenario is that you have low compression. but i think your issue is more of a fuel related issue.

[tcplaya3]

BAD START UP VIDEO: http://www.youtube.com/watch?v=iTed48ITNQo

After that video, the battery died. So i got my other car behind the skyline are jump started it. heres the video: http://www.youtube.com/watch?v=vxlpMaw5ZIs

[mad082]

do you have the stock boost gauge still working? if you do then you have a SERIOUS intake leak and that is what is causing your problem. if you have an aftermarket boost gauge, what sort of vacuum do you get at idle? if it isn't up around -20 then you have a vacuum leak.

i'd also sort out that squealling belt. if that is on the alternator then it probably isn't helping the situation, especially if it is caused by the alternator being a bit suspect. it would be making the car harder to start if it (or another belt driven accessory) is a bit siezed.

i would also start with a new battery and make sure that it is the appropriate CCA for a skyline so that it has enough juice to turn the car over at the right speed. unless you had been doing a lot of attempts at starting the car before the first video, and a fair few after, then the battery should've been fine. so it points towards a weak battery as part of the problem (or a failing alternator)