1989porsche928

Hello, this is not my S4 but I also have an '89 and it does make the same tapping sound. Fast forward to 5:05 when he opens up the hood. Is that sound normal?

Chalkboss

Sounds normal to my crappy ears. Injectors ticking. I recall someone putting insulation on the fuel rails to cut down on the noise... Dwayne. I never heard whether this cuts down on the noise or not.

terry gt

I will vote for normal injector noise

1989porsche928

Lol i need to find others with 928s. I thought i had bent valves or stick lifters.

jwbeck17

I have the same noise from my '89. Capt Earl took a look at it and said it was ok, so that is good enough for me!

Chalkboss

You will definitely notice a lifter sound from this ticking, lifters are more of a "clacking" sound if that means anything to you!

Mrmerlin

yep thats a normal injector clicking noise ,
Now you could add about 6 oz of MMO to the fuel and it may quiet them down a touch

MainePorsche

Tappet chatter ?
Does he have the superceded pins in the cam journals or the notorious prone to failure rubber disks with the little pinhead ?

Leon Speed

Yes it does help.

NC928S4

My 89S4 with almost 127K on the clock sounds about the same.

928porschemangreg

Ditto on my '89.
maybe not as loud. I alternated Lucas fuel injector cleaner and MMO for a month and it did it some good.

Bertrand Daoust

+1.

UpFixenDerPorsche

Injector ticking.

Rember the injectors are 'gang' fired ie all at once, rather than in sequence.
This causes large start/stop of fuel flow which accentuates the ticking sound.
Put your finger on an exposed part of a fuel rail and you'll feel it quite distinctly.

Otherwise sounds the same as my S4 and GT.

michaelathome

Blacks whites and reds always look the BEST!!

You actually grabbed the "CS" or Club Sport design in your paint and lighting with out having a club sport sticker on it. Amazing! You have got to love design concepts. That is the first time I have seen it on a non sticker car.

My engine sounds the same.

Michael

Randy V

It's gonna blow!