[Shotimes] engine stumbling

[Mike Bruce]

Denso is a company, like Federal-Mogul, MOOG, etc.  They make a vast
array of parts that are probably sold under different brand names.
Denso is most well known as a spark plug maker.  Perhaps your pump has
been replaced in the past?

-----Original Message-----
From: shotimes-admin@autox.team.net
[mailto:shotimes-admin@autox.team.net] On Behalf Of Paul Nimz
Sent: Saturday, August 06, 2005 1:39 PM
To: `V6 SHOtimes; Mike Bruce
Subject: RE: [Shotimes] engine stumbling

Speaking of fuel pumps.  The one I took put of my '97 had Denso written
on it.
What does that imply?

Paul


On 8/6/2005 11:57:56 AM, Mike Bruce (shoitoff@verizon.net) wrote:
> I got the fuel pump in last night.  Fuel pressure at idle and while
> goosing the throttle showed no change, but at steady and slowly
> increasing throttle, I am noticing some difference from my old
numbers.
> I drove the car 25 or so miles this morning, and everything seems
> normal.  Right now,
> I'm off to find a replacement J3 connector for my
> ScTuner.
>
> Mike Bruce
>
> -----Original Message-----
> From: shotimes-admin@autox.team.net
> [mailto:shotimes-admin@autox.team.net] On Behalf Of Zach Leahy
> Sent: Thursday, August 04, 2005 8:35 AM
> To: Co-Op
> Cc: Al & Angela; shotimes@autox.team.net
> Subject: Re: [Shotimes] engine stumbling
>
> Ok, Fuel pressure regulator needs to be thought of for a moment.
>
> The fuel pressure regulator is driven by the manifold vaccum.  More
> vaccum and the pressure drops, less pressure and it increases.
>
> At Idle you are getting about 24 in Hg and that coincides well with
> the pressure you have listed at idle.
>
> When you blip the throttle, the mnifold vacuum goes down to near 0
> inches Hg.  Pressure goes up accordingly. Just like yours did.
>
> When you slowly open the throttle the vaccum level is still pretty
> high, probably near 20 inches Hg.
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