Car Playing Funny Buggers :(

[soultz]

hey guys,

took my car to get fuel in the morning yesterday, then washed it. ready for heathcote drag day. we left for the hume highway at 7.30, the car got to the servo fine where we met up with the rest of the cars attending. when we left i started the car all was ok, was travelling down the highway at 100Kmph, then all of a sudden felt the car not shaking but more like a shutter sort of like when you are about to stall it in a manual but all the time...when i accelerated the car would go nowhere untill the turbo kicked in then it JUST dragged the car along...we stopped at a safway on the side of the road, and i turned the car off and back on, and it still done it...i looked under the bonnet and everything seemed ok....i als checked for boost leaks using my gauge, and vaccum and boost was fine...i then turned the car off, left it for a bout 5 mins and turned it back on and it was FINE??!! i still didnt trust it so i left it there all day and went to the drags without it. i came back later that afternoon to grab it and it started fine, drive 50 mins home fine and now runs fine...i cant fault it now??

the car also sort of missfires when i put the foot to the floor at 5000 rpm, but the revvs still keep climbing like normal??? i changed the coilpacks and that helped a LOT, but it still does it under full throttle...its not like a missfire but like a stutter??

can anyone help with BOTH these problems???

cheers!

[SargeRX8]

What has been changed in the car, what mods? did you wash only the outside of the car, excluding the engine bay?

[89CAL]

Id point towards a plug or sensor got wet or the fuel you got had some crap in it. seen as the only 2 things you did was wash it and put fuel in it. it might clear itself up after a drive, don't flog it to much in the mean time

[Dajae]

Check your spark plugs. Any moisture in there can cause problems. Do you have a stock fuel pump? It might've just been shitty fuel..

[soultz]

it might be the fuel yeah...it is possible to get a bad batch...

i changed the spark plugs with the coil packs about a month ago and its been great...

the car is fully stock...0 mods

[soultz]

i washed only the ouside of the car, as i was it all the time and no water got in the bay whatsoever...

[soultz]

but ive always had that sort of missfire when i stomp it...i dont know how to get rid fo that

[Dajae]

Could be a tuning/pump issue.. Fuel filter all good?

[soultz]

possibly a fuel pump yeah...ill source where i can get one from and ill change it anyway...where does the fuel pump on a skyline sit anyway??

[SargeRX8]

In the boot, remove the back board, you will see 4 10mm screws holding down a plate. Remove that. Under there is a black lid thing with 3 hoses. You want to unplug the wires and get a rag ready for when you remove those lines as fuel is going to come out. Keep the hoses out of the way and take that lid off. To do that get a piece of wood and put it in the notches in the lid and tap it with a hammer to loosen it and get it out. Fuel pump is inside. Plenty of guides here to elaborate and show pictures of how to do it, wire it and fit it back in.

Its not a fun job. Don't do it on a hot day and be ready for swearing. DO NOT EVER attempt to do it with more than a quarter fuel in the tank. Hell run it to near empty if you can.

[GTR_JOEY]

In the boot, under the carpet there on the right hand side.. Unscrew the cap and there it is in it's cradle..

Edited February 13, 2012 by GTR_JOEY

[soultz]

sounds mighty fun haha. hope it fixes the problem, and the little misfire i got going too...thanks guys, ill buy one and get it in

[89CAL]

Fuel pump isn't that hard if you get a good one. my tomei pump was easy as. pull the old one out, drop the new one in

[Guilt-Toy]

check the ecu, its possible water got in and its messing with things.. take the ecu out and look at the pins, dry them with a heat gun or hair dryer

[Hanaldo]

Fuel pump isn't that hard if you get a good one. my tomei pump was easy as. pull the old one out, drop the new one in

This. Took me half an hour, including diagnosis of why the car wouldn't start when I reversed the polarities

Agree with running the tank near empty first though. Arms get real damn itchy immersed in petrol

Edited February 13, 2012 by Hanaldo

[SargeRX8]

This. Took me half an hour, including diagnosis of why the car wouldn't start when I reversed the polarities

Agree with running the tank near empty first though. Arms get real damn itchy immersed in petrol

And in a hot day, that itch plus the humidity rising from the fuel tank is enough to really f**king frustrate you when you cant get that cradle in the bracket.

[soultz]

wheres the ecu??

[89CAL]

Jeze you guys are soft I get covered in diesel so many times. that shits way worse haha

[89CAL]

Ecu is in the passenger side kick panel (left of where your feet would be)

[soultz]

how the hell can water get in there???