Stumbling At Startup

[1997ThunderbirdLXV6]

Is it supposed to?

No. Let me rephrase my question: why is the Thunderbird not supposed to have a fuel pulse dampener?

: from what I Googled, the Taurus has a returnless system.

For '99? I think that came later, 2000 potentially. Looking at Tascaparts, '99 is the last year that Taurus V6 24V uses the same fuel pressure regulator as Thunderbird V6. I physically verified this on the junkyard Taurus.

Once they go returnless, I think there's no more fuel pressure regulator, but a pressure sensor instead (?).

 

[XR7-4.6]

No. Let me rephrase my question: why is the Thunderbird not supposed to have a fuel pulse dampener?

Who says it doesn’t?

 

[Kenz]

Who says it doesn’t?

View attachment 11334

I left that off when I replaced the pump.

My reasoning was that most aftermarket pump assemblies don't have them.

 

[Grog6]

iirc. turbine fps dont use them, ours might.

 

[Kenz]

Sounds right.... I'm also good to make up to 850hp now

 

[XR7-4.6]

I left that off when I replaced the pump.

My reasoning was that most aftermarket pump assemblies don't have them.

Same here it’s just there for NVH as far as I can tell anyway.

 

[1997ThunderbirdLXV6]

But what do you gain by removing it?!

And side note on NVH: Valvoline Restore & Protect for the last four oil changes has made my engine run as smoothly as butter. I know, it's just oil...but I'm not imagining this!

Meanwhile I'm noticing new suspension noises. There's always something...

 

[XR7-4.6]

But what do you gain by removing it?!

Nothing perceptible, but like most NVH items I’ve gotten rid of I don’t miss it

 

[Kenz]

Less connections on a difficult to access, in take pump is a plus. That pulse damper appeared to be just plastic and had a crimped on metal cap. Removing it eliminates a few possible failure points