Stumbling/hesitation problem...

[roccit_53 at scirocco.cs.uoguelph.ca (C Boyko)]

LOL, Mark? I know what's wrong with it. I'll quote some guy called MkIMark:
"It's CIS". Maybe MS it? <ducking, giggling>

Seriously, do both a spray and a volume test on those injectors. Klaus had
alternating spells of running fine and running like ass on his failing fuel
distributor, the volume test uncovered that easily (even though spray
pattern looked fine). Then at least you can rule out basic fuel flow as a 
cause.
Cathy

On 11:55 pm 09/14/06 "Koabi Brooks" <koabi@seeohdee.com> wrote:
> Unplug the knock sensor to make sure.  I do have a coil to dist wire
> laying around if you want me to send that out
>
> -----Original Message-----
> From: Mark F. [mailto:mk1mark@gmail.com]
> Sent: Thursday, September 14, 2006 8:51 PM
> To: Scirocco List
> Subject: Stumbling/hesitation problem...
>
> Hi guys,
>
> First off the car is an 82 8v ABA/JH, w/ knock sensing ignition
> swapped in.  I'm having a stumble/hesitation/bogging problem that is
> proving difficult to track down.  When I first fire it up it'll run
> fine for about 10 seconds, but then I have to give it gas to keep it
> running at idle.  When I accelerate it stumbles bigtime, but it revs
> to redline (feeling smoother as the revs climb), but it's definitely
> down on power.  It's very hard to launch from first gear, and stumbles
> the most when gently accelerating.  If I mash the throttle it'll run
> smoother, but still misses a bit.  I'm assuming it's a spark issue
> since it also backfires on deceleration and I can smell unburned fuel
> when idling/taking off...
>
> I changed the fuel filter, rotor and cap, coil, plugs and wires.  It
> ran fine for a day after I changed the plugs and wires, but the next
> day ran like crap again.  I thought it might be a weak coil, since the
> new plugs seemed to fix the problem when fresh, but I swapped in a
> known good coil and still have the same issue...  The one thing I
> haven't swapped is the coil to distributor wire (since I don't have
> another lying around).  I'll try to find one at my buddies shop
> tomorrow to try.
>
> Any ideas what else might be wrong?  I'm pretty confident the knock
> sensing ignition swap isn't the problem - I did a nice job splicing it
> in.  It feels to me like the spark is too weak.  This car has had
> numberous wiring maladies, so I might try wiring the coil directly to
> the battery (fused) and see if that helps...
>
> Thanks,
>
> Mark.
> 75
> 82
> 82 Caddy
>
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