[s-cars] Rough running, what could it be?

[Mark Strangways]

FPR.
Test the fuel pressure at idle and compare with good known value.

Mark
----- Original Message ----- 
From: <calvinlc at earthlink.net>
To: "James Murray (QB/EMC)" <james.murray at ericsson.com>; 
<s-car-list at audifans.com>
Cc: <jhosi at sympatico.ca>
Sent: Friday, November 10, 2006 10:21 PM
Subject: Re: [s-cars] Rough running, what could it be?


> Did the fuel pump possibly come loose somehow?  Was this the same reason 
> why
> the fuel pump was installed?  If so, then I would say it probably isn't 
> the
> fuel pump.  If this is new since the fuel pump then it may be the FP. 
> What
> about the MAF?
> --Calvin
>
>
> -----Original Message-----
> From: s-car-list-bounces at audifans.com
> [mailto:s-car-list-bounces at audifans.com]On Behalf Of James Murray
> (QB/EMC)
> Sent: Thursday, November 09, 2006 11:20 AM
> To: s-car-list at audifans.com
> Cc: jhosi at sympatico.ca
> Subject: [s-cars] Rough running, what could it be?
>
>
> Request for help (see below), it sounds like the Fuel pump is dying...
> but I suggest testing the injectors by disconnecting them one at a time
> first and seeing the effect.
>
> What does the list wisdom say? John is copied.
>
> Cheers, /Jamu.
>
> ________________________________
>
> From: John Hosi [mailto:jhosi at sympatico.ca]
> Sent: Thursday, November 09, 2006 9:58 AM
> To: James Murray (QB/EMC)
> Subject: Can you ask the list for me?
>
>
> Hey james,
>
> can you ask the list regarding my car problems:
>
> 1. Car struggling big time to get up to above 3000 RPM, at any gear but
> never stalled. Like it is short on gas. Once get past 3000 rpm, runs
> better but still has some jerking motions
>
> 2. Idle is not stable, going from  800 rpm to 1000 rpm and back
>
> Recently replaced all 5 plugs and added a new oil change using 5-40
> castrol Syntec. A new fuel pump was installed a few months ago. But
> recently heard a thump in the back everytime I started up the car. I
> think I heard the fuel pump starting up.
>
> Starting is no problem and there is no black smoke.
>
> Thanks james.
>
> Later,
>
> J.
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