Car Jerking

[Oo_oO]

i have a 1993 r32 gts-t and latley its been acting like a bitch sometimes it will drive fine with out a problem then others times it will start jerking after 4000 rpm to about 5000 then it just revs really slowly after that and on long trips the jerking starts to get worse to the point that i cant go past 2000 rpm unless i let the car rest for a bit then off i go and i just seem to have no power it just dies i put the foot down and nothing.

i have changed spark plugs to a gapped .08, changed to splitfires coils changed afm and im about change fuel filter.

what else could it be or should i just take it to a shop and get it looked at and if so are their any good places in toowomba that can look at it, or just take it to brisbane to get looked at

cheers james

[GeeTR]

Prolly start at listing your mods, if anything coincides with the occurrence... umm etc?

[Oo_oO]

Prolly start at listing your mods, if anything coincides with the occurrence... umm etc?

The only mods are a 3inch turbo back exhuast and a hks pod filter

the zorst was put on after as i thouhgt the cat could have been blocked and the pod has been on for ages before the problem

[dan_the_man]

how old are ur plugs? wat are they gapped at

ps. terrible thread title.

[GeeTR]

keep going... does it play up when your sitting between 4-5, or when sweeping through it? What about if your on the decel and sweep backwards through that range?

[VB-]

dirty injecotrs? dying fuel pump? dodgy fuel pump relay?

[infamous_t]

What cat you got in there? Might be foobar'd

[dan_the_man]

the zorst was put on after as i thouhgt the cat could have been blocked

[Oo_oO]

the problem realy is when going up in rpm then it like a really bad miss casue teh car to jerk when i decel its fine then after about 30 min of highway drive just sitting on 100 if i come to a hill the car just dosnt want to acel up the hill. if i let it sit for a while its fine again for a little while. The plugs are gapped .08 and they would be about less than 500km old.

ill see how the car goes when i put the afm that i just soldered up back and see what happens.

[vinnie32GTS4]

sounds like something to do with your fuel pump me thinks

[mark_sudakov]

if your missing at that rev range and spark plugs r gapped down, then its most likely the coil packs

[TheProDaniel]

I'm having the same problem with gapped plugs and splitfires so I'll give you a bump.

[sl33py]

What the h3ll is it with ppl avoiding taking their car to a mechanic?? I wonder just how many cars are kept off the road for months at a time cos of ppl scratching around on here trying to solve faulst which could be solved in a hours of a mechanic's time. Especially when ppl have a hard time describing faults on here... you could just SHOW it to a mechanic and say "THERE! THAT! What IS that?? Fix it pls!"

[700HP-GTR33]

Coil pack / AFM /fuel pump....check in this order.

[Rolls]

Probably shagged coils/plugs along with running too rich. Fix up your air fuel ratios, regap your plugs down to .8 (lower if needed) check your coilpacks for cracks. This is a very common problem, theres about 10 threads on it if you do a search.

[DECIM8]

Does the car idle correctly or hunt at idle? Why do u have plugs gapped to 0.8 yet have to boost mods?

0.8 gapping its only "needed" after 10psi from what ive been told?!

If its hunting at idle its coil packs, they will need to be replaced.

How much fuel do you use? this could help us determine if the car is running super rich and fouling the plugs?

If you AFM clean? If not search threads on how to clean it.. there is a sensor which lets the ecu know how much fuel vrs air to inject if its dirty or covered in oil then it will not work effectively and may be making the ecu hit a safety cut of some type, perhaps fuel or air cut.

If your running a boost controller over 10psi you could be hitting either.

Perhaps a visit to the mechanics is in order

[Oo_oO]

with fuel econmy i was getting about 350km to a tank with a mix of highway and city driving but since the problem has started i havnt driven the car much just to and from work and around town. ill see what happens when i clean out the afm and put it back in. A new fuel pump cant hurt either i guess as the car is 14 years old. And should i go back to the 1.1 gapped plugs instead of the 0.8 as im just running the standard 10 psi boost. It does hunt at idle but the coils are brand new splitfires that have been in for under 300km old. would a o2 sensor be apart of the problem or no way. and since moving to millmerran i hanvt really heard anything that would make me trust my car at the local mechanics so any of the qld people out their no of a good workshop in toowomba that would be super.

[Rolls]

Keep the gap at 0.8mm.

[Justa32]

fuellllllll pump, had this problem with my car new pump solved it

[GeeTR]

What the h3ll is it with ppl avoiding taking their car to a mechanic??

Clearly its the "Thrill of the chase" Ben...

Edited April 4, 2008 by GeeTR