Tappet/ticking noise from top of engine. Pin please?

[zurgieSR]

Im not sure if this is a repost but in regards to a few previous topics ive read on the same type of problem, there hasnt been much success in curing the noise completely. Alot of members seem to be hearing a tappet type noise from the engine and most measure the gaps showing no fault with the tappets. some have went on to replace injectors and what not. However, as i was clearing up today, i had my car ticking over outside to warm up abit, and just out of curiosity, i asked the old toyota master tech who was out having a smoke what he thought the noise was. Turns out, toyota had a tsb (technical service bulletin) in regards to this exact noise which involves removing the banjo bolt that connects the fuel line to the fuel rail with a fuel pulsation damper. Will look into this more in the next few days but he says you can buy them from toyota from around 20 to 30 quid. seems also that jap spec 4efe's came standard with them, but uk models didnt have them.

[akyakapotter]

thats good to no mine ticks very loudly quite anoying looking forward to what you find out

[akyakapotter]

looking on toyota diy glanzas didnt come with them its listed on the uk spec but says not applicable just a different banjo bolt by the looks of it that stop polisation in the rail.

just been having a read about them and found this

Fuel Pulsation Damper

Fuel Pulsation Damper. What is it?

A fuel pulsation damper is a device used to regulate the oscillation of fuel caused by the injectors opening and closing and smooth this out. Sometimes referred to as a FPD. At this time I do not have a diagram to show you, so you will need to use your imagination as I describe it the best I can. Sorry.

The damper uses a diaphragm to absorb pulses or waves in the fuel. If you could picture what would happen if you were to have a large beach ball in a pool and "bounce" the ball half under the water, let it come up and repeat several times. Waves would form. The injectors opening and closing against the pressure sent by the pump causes the same waves in your fuel system. The damper's diaphragm is used to absorb these waves and smooth the fuel delivery.

Many people say you do not need the pulsation damper, other will tell you that you do. The ones that say you do not need it more than likely either heard of someone or themselves had an engine fire due to the pulsation damper failing. The ones that say you do need it may have heard stories of an injector failing because there was no pulsation damper. The failure of the injector was caused by the fuel hammering the injector so hard that it failed. I have never personally seen an injector in this state (remember we se A LOT of injectors) and still feel this is an urban legend. If you happen to have an injector in this state, please let me know. I would LOVE to test and analyze it.

If you are running an aftermarket fuel pressure regulator, more than likely there are dampening capabilities built into the regulator. I know for a fact that Aeromotive regulator use this technology but I am not sure about others. Mounting the aftermarket regulator as close to the fuel rail as possible will eliminate any need for additional dampening. The Aeromotive units will regulate the flow by creating a stable and smooth flow.

In short, a pulsation damper does serve a purpose, but is not "nesecary". Many cars like the Mazda RX7 are equipped with a fuel pulsation damper that is prone to failing and causing an engine fire. If you plan on retaining the FPD you must keep an eye on it. Replace it BEFORE it fails and you loose your car to a fire.

Edited January 29, 2014 by akyakapotter

[zurgieSR]

will be in work 2mora and get onto the toyota portal to see what i can find.