R34 25gt Hesitation issue

[Giaccovitch]

R34 25gt Hesitation issue

I've been searching around for a while but can't seem to find the problem, while cruising or holding revs at a certain point the car starts to jolt or hesitate, it's fine when accelerating or at idle.

[er34gtv]

What mods have been done to it?

Since its not missing on idle or under accleration im leaning towards a fueling issue rather than the more common coilpack or spark plug problem. Possibly dirty air or fuel filter? Anyone else have any ideas?

[Giaccovitch]

I don't think spark plugs and coils have been changed since it came from japan, I'm the first owner here imported at 107ks, it now has 125.
I just replaced the fuel filter the other week, and only minor mods, exhaust, coils, air filter

[er34gtv]

Try a new set of coilpacks and spark plugs and see how you go, they were the first things to die on me when i imported my 34 from japan at around 88,000kms. I bought yellow jacket coil packs and NGK iridium plugs to fix the issue.

[KiwiRS4T]

If you have changed the coils but not the plugs they should be looked at anyway. If in doubt replace with new ones gapped down to 0.8mm.

[Giaccovitch]

15 minutes ago, er34gtv said:

Try a new set of coilpacks and spark plugs and see how you go, they were the first things to die on me when i imported my 34 from japan at around 88,000kms. I bought yellow jacket coil packs and NGK iridium plugs to fix the issue.

I'll give it a crack mate

[Giaccovitch]

11 minutes ago, KiwiRS4T said:

If you have changed the coils but not the plugs they should be looked at anyway. If in doubt replace with new ones gapped down to 0.8mm.

Coils haven't been done either mate

[Giaccovitch]

54 minutes ago, er34gtv said:

Try a new set of coilpacks and spark plugs and see how you go, they were the first things to die on me when i imported my 34 from japan at around 88,000kms. I bought yellow jacket coil packs and NGK iridium plugs to fix the issue.

So did you have a similar issue to me?

[KiwiRS4T]

2 hours ago, Giaccovitch said:

Coils haven't been done either mate

Um you said the mods included coils.

[Giaccovitch]

1 hour ago, KiwiRS4T said:

Um you said the mods included coils.

Coilovers sorry mate

[KiwiRS4T]

18 minutes ago, Giaccovitch said:

Coilovers sorry mate

OK then but still coils are expensive so I would take them out, give them a good clean and try insulating them with tape or a spray and fit new plugs.

[Giaccovitch]

10 hours ago, KiwiRS4T said:

OK then but still coils are expensive so I would take them out, give them a good clean and try insulating them with tape or a spray and fit new plugs.

I just bought some splitfire coils, when they arrive I'll change plugs and see how I go

[er34gtv]

Had a problem with the coilpacks and/or plugs in mine. Was causing the car to missfire and jolt/hessitate while under acceleration, cruising and at idle. It felt like i was loosing power and over time it gradually got worse and worse until it got to the point i could barely drive up a hill. Replaced everything and havent had a problem since. Where are you located?

[Giaccovitch]

10 hours ago, er34gtv said:

Had a problem with the coilpacks and/or plugs in mine. Was causing the car to missfire and jolt/hessitate while under acceleration, cruising and at idle. It felt like i was loosing power and over time it gradually got worse and worse until it got to the point i could barely drive up a hill. Replaced everything and havent had a problem since. Where are you located?

I'm in the northern suburbs in melbourne, I have no problems with the car accelerating or at idle, it's just trying to maintain a certain speed and sometimes when it neutral if I try to hold at a certain revs it jumps up and down a little. The coils/sparks have never been changed on the car so I'll give it a crack anyway, got coils coming in the next week or two

[Giaccovitch]

Problem was a faulty TPS