ticking noise from engine

TomVR4 · Post by **TomVR4** » Wed Jul 25, 2007 4:07 pm

Hi i have noticed recently that my car is making a ticking noise when under load/ on boost. i can't really hear it when the car is idling, and can't really hear it above 4k. i may not be able to hear it above 4k because of the engine noise. either way it is most noticable under load around 2k to 4k.
any ideas what it could be? i thought it might be the lifters, but wouldn't i be able to hear that all the time, ie at idle.
Any help/suggestions appreciated.

MrBishi · Post by **MrBishi** » Wed Jul 25, 2007 4:57 pm

Exhaust leak?

Cookiemonster · Post by **Cookiemonster** » Wed Jul 25, 2007 5:02 pm

Pinging?

tri26t · Post by **tri26t** » Wed Jul 25, 2007 5:03 pm

could it be running a little lean on boost ??
maybe time to check those injectors ???
cheers:Phil.

Starion_Turbo · Post by **Starion_Turbo** » Wed Jul 25, 2007 5:25 pm

check all ur exhaust manifold nuts are there and tight

TomVR4 · Post by **TomVR4** » Wed Jul 25, 2007 5:34 pm

yeah i think it is running lean on boost, this would cause it to ping wouldn't it. Anyone got a set of 650cc injectors they want to sell? how much would a set cost.

TomVR4 · Post by **TomVR4** » Wed Jul 25, 2007 5:42 pm

found some on nissan silvia;

LANCER Evo. I~IX CT9A/CP9A/CN9A/CE9A 4G63
SARD 4 x 650cc Injectors LANCER Evo. I~IX CT9A/CP9A/CN9A/CE9A 4G63, $499 Delivered
SARD 4 x 700cc Injectors LANCER Evo. I~IX CT9A/CP9A/CN9A/CE9A 4G63, $499 Delivered
SARD 4 x 800cc Injectors LANCER Evo. I~IX CT9A/CP9A/CN9A/CE9A 4G63, $499 Delivered

sounds pretty cheap, what do you think?
heres a link;
http://www.nissansilvia.com/forums/inde ... pic=245222

what size should i go for? they are the stock 450cc injectors at the moment which are at 99% duty.

flav · Post by **flav** » Wed Jul 25, 2007 5:56 pm

Are u nuts???? 450@99% is NOT GOOD. They are basically not closing at all!!! This means they are open 99% of the time at that point and they WILL burn out.
550 should get you out of trouble. If the injectors are too big it will suffer @ idle. 650 is usually for lots of power.....how much power do you have at the moment?

Contact PETROJECT....They have kick ass deals on injectors at the moment.

TomVR4 · Post by **TomVR4** » Wed Jul 25, 2007 6:09 pm

not sure how much power. maybe around 190rwkw. not really sure though. its a vr4 motor gt30r (around 15-16 psi), wolf 3d ver4, front mount 3 inch exhuast, bosch 044 fuel pump, fuel pressure regulator, etc. with all that, how much 'should' i be making.

TomVR4 · Post by **TomVR4** » Wed Jul 25, 2007 6:16 pm

now that i think about it. im not that sure it is pinging, because it makes the noise before it is on boost hard. like at 0-1psi it starts making the noise? ill check for exhuast leaks tomorrow

flav · Post by **flav** » Wed Jul 25, 2007 6:37 pm

OK...
Im thinking probs 550 but mabey 650...

You can estimate it by using a number of calculations available.

Try one like this....

http://www.iroczone.com/calcs/injectorsize.htm

Post by **TOMSUN** » Thu Jul 26, 2007 9:58 am

Check your fuel pressure at boost... If you have an adjustable FPR it might need to be increased.

Higher fuel pressure will help flow more fuel. Worth looking into...

Austarion

ticking noise from engine

ticking noise from engine

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