MR2 Roadster Owners Club

The Workshop => Performance Related => Topic started by: Carolyn on August 13, 2018, 15:34

Title: Checking fuel pressure
Post by: Carolyn on August 13, 2018, 15:34
Assistance, please. from anyone who's done this:

Where's the best spot in the system, to introduce a fuel pressure gauge.

Also what method of attachment do you use? 
Title: Re: Checking fuel pressure
Post by: lamcote on August 13, 2018, 22:32
Since no-one else is replying I'll have a go.

I would suggest the inlet to the fuel rail is the best place. Spyderlee has a YouTube video about making a modified fuel rail with a return line which covered a connection method and spec for a fuel line on the rail I think.
Title: Re: Checking fuel pressure
Post by: Carolyn on August 14, 2018, 08:26
Thanks for that Patrick.

I just realised that I've got a spare fuel rail stashed.  I'll dig it out and have a look.
Title: Re: Checking fuel pressure
Post by: shnazzle on August 14, 2018, 08:57
Was going to say much the same but a return rail would obviously require a bit more mapping work and a 1:1 RR FPR.
But in any case, I'd put it as close to the destination as possible.
Title: Re: Checking fuel pressure
Post by: lamcote on August 14, 2018, 15:19
This is the video:

https://youtu.be/OYwf8yp0KdQ
Title: Re: Checking fuel pressure
Post by: Carolyn on August 14, 2018, 16:12
Thanks for that.  However.

A fuel return rail is not the problem.  We made one for Gary Scholz, so we can make another.

I just want to measure the output from the fuel pump in the car.

Title: Re: Checking fuel pressure
Post by: lamcote on August 14, 2018, 17:52
Yes I know but I assumed you could use the same method of fastening/connection to connect a fuel pressure gauge to the inlet end of the rail.
Title: Re: Checking fuel pressure
Post by: Carolyn on August 15, 2018, 08:54
Aaah!! Get your point.
Title: Re: Checking fuel pressure
Post by: lamcote on August 15, 2018, 12:22
I've just watched a scanner danner video about fuel pressure on a Honda. It had a threaded connection on the rail (closed by a bolt) specifically to allow a fuel pressure gauge to be attached. He just undid the bolt and connected a gauge in seconds.

Might the 1zz have one?

Edit: can't see one anywhere unfortunately.
Title: Re: Checking fuel pressure
Post by: Essex2Visuvesi on August 15, 2018, 13:21
Quote from: lamcote on August 15, 2018, 12:22
I've just watched a scanner danner video about fuel pressure on a Honda. It had a threaded connection on the rail (closed by a bolt) specifically to allow a fuel pressure gauge to be attached. He just undid the bolt and connected a gauge in seconds.

Might the 1zz have one?

Edit: can't see one anywhere unfortunately.

Not that I've ever seen
Title: Re: Checking fuel pressure
Post by: lamcote on August 15, 2018, 13:36
Shame because the Honda was a breeze to test.