Hot Start Up Problem And Ticking Noise

[R0yalT]

Hi SAU!

I started modding the r34 gtr about 8 months ago.

Stock Coil packs / spark plugs started to go when I got a vented bonnet so I have split fires put in. Problem solved but I started having slight start up problems. Takes a slightly longer crank for the engine to come alive. And sometimes took a second crank.

But I lived with it not thinking much. Put -5 turbos in, put in 1000cc injectors, fpr. Then off for a tune with a haltech pro ecu.

Since then car won't start when it's warm or hot (unless I gas it a little). Starts at once when it's cold tho. Then as of today, I started it up (cold start) to look around the engine bay and its making a ticking noise near the injectors and the exhaust sounds rough. I checked my idle and it's sitting at a very low 1000rpm.

Also it feels like the car will stall when it slows to a stop.

I've searched around, possible problems:

-spark plugs going

-one of the temp sensors are failing

-earthing problem (rain gets into the engine bay from the bonnet and could corrode the grounds)

-tune not adjusted for start up

-idle adjustment set too low (but doesn't explain the loud ticking noise)

-injectors not working properly (sat in the car for about 5months before installation waiting for the ecu and tune)

-fuel pump or something in the fuel system not working and therefore not producing enough pressure in the start up.

-Valves? (Ticking noise)

I have a video if you guys want me to upload showing the ticking and the low idle.

I'm sorry if I'm not very descriptive with my problem as I'm typing on an iPhone. Laptop is at work.

Cheers,

Raymond

[abr33]

I think you'll find the ticking if it is a light and consistent tick will be injectors. Idle and start sounds like a problem with the tune. 1000rpm idle is fine, even a tad high...

[R0yalT]

Thanks abr33.

I jiggled each one of the injectors and made sure it was on properly.

Decided to go for a drive to fill up. Drove fine, even started while it was warm. I know when I had the stock injectors it wasn't ticking as loud so it might be the bigger cc's.

I'll have to drive it around more to diagnose any more problems. I thought 1000rpm on a cold start is a bit low, but it might just be me.

Anyways thanks again abr33. I feel a lot more confident about it now.

[GTSBoy]

Use a short length of hose as a stethoscope. Point one end as close to an injector as possible. if the noise is loudest at the injector and quieter further away......the noise is coming from the injector.

[JordansR32]

Id put money on the ticking noise being a noisey injector, mine done the same thing when i put injectors in my 32, came like that from the factory, very strange, low idle could be tps maybe?

[abr33]

Some injector brands are louder than others. Like xr6t at idle all you hear are the injectors, very loud. Provided one isn't ticking louder than another you should be fine

[Hanaldo]

Idle is fine, ticking noise sounds normal as others have mentioned. With regards to the hot start issues, I had a similar issue that turned out to be my earth cable from my battery to the chassis being loose. Check all your earth's and make sure they are ok and the cables are in good condition. Heat increases resistance.

[R0yalT]

Thanks guys,

I did buy an earthing kit as I suspected the current grounding areas are dirty or earth's have corroded, especially with all the rain Sydney was having.

I need to do a custom rain set up like the nismo bonnet.

I feel a lot better with the responses here. Feels like I can settle into SAU just fine =]

[R0yalT]

Quick update boys.

The car won't even start now. It cranks over normally so it's not the battery.

Someone said it could be a belt or the sparkies.

I wish my mechanic was back from his holidays already haha.

[Hanaldo]

Well check that you are getting spark and check your belts. Have you checked your earth cable? I don't trust those earthing kits, I had one on my car that earthed it in 9 different places, did nothing. Only fixing the main factory earth fixed the issue.

[Hanaldo]

For reference, this is what mine was doing:

[R0yalT]

Thanks hanaldo. Exactly what mine was doing except the last time it fired up it would die straight away. We'll see when I get the earthing kit. I tried sanding back the corrosion on the earthing mount on the manifold cover and the earth cable. I'll recheck the belts again tonight and the earths.

[Jayden.K]

Mate it seems like you one way valve in your fuel pump is f**ked. Not holding fuel once it's not pumping. The vavle may be external in line somewhere