RE: [alfa] Dead GTV-6, stymied mechanics

[Alan Lambert <lechefgerard@xxxxxxxxx>]

JEFF AND ALL See answers below, but one question--does the timing
control unit affect the injector pulses??--we do have spark back now.


--- Jeff Greenfield <alfaguy@domain.elided> wrote:
> Alan - 
> 
> I can't tell you what exactly is wrong with your car. You obviously
> have a
> component somewhere or an electrical connection that is doing a slow
> death.
> When mechanic number two worked on it and had it running all was
> well.

he never had it running well--

> Between then and the next morning when it did not something quit or
> is
> affected by temperature.

I agree

> 
> You need to start over at the top of the diagnostics flow chart that
> is in
> the manual. 
> 
> Some more information would be helpful ...
> 
> Assuming that the car is still in the 'no start' phase - 
> 
> 1 - Is there spark?---YES
> 
> 2 - Is there an injector pulse?---NO
> 
> 3 - Does the fuel pump run during cranking?---YES
> 
> 4 - What is the battery voltage during cranking?---USED SUPPLEMENTAL
BATTERY AS WELL
> 
> One and two could both be a result of a failed hall effect sensor in
> the
> distributor, or faulty wiring. I've seen flakey connections at the
> connector
> to the distributor before.---I'LL CHECK
> 
> Three could be a result of a faulty dual relay (I know you said it
> was
> replaced, does not mean that the new part is not defective, I've seen
> DOA
> parts out of the box more often you'd think). Could also be a failed
> microswitch in the AFM.---I'M GOING TO TRY ANOTHER AFM
> 
> A week battery can cause all kinds of weird problems. Just because
> the
> engine turns over ok, does not mean that the battery is good.
> 
> There is a very straightforward and easy to follow flow chart for
> diagnosis
> in the manual. Start at the beginning and don't skip any steps. You
> will
> need a scope for a couple of the tests (especially the hall sensor).
> 
> If you get it running without really having done much, try the wiggle
> test
> on each and every connector you can find to see if you can find the
> problem.
> 
> Also, you said that another ECU was tried. What about the timing
> control
> unit that is up under the dash? If that is bad there won't be any
> spark.
> 
> HTH,
> 
> Jeff
> 
> 
> 
> -----Original Message-----
> From: owner-alfa@domain.elided [mailto:owner-alfa@domain.elided] On Behalf
> Of Alan
> Lambert
> Sent: Tuesday, March 30, 2004 9:55 PM
> To: Alfa Digest; Alfa Digest; Alfa Racing
> Subject: [alfa] Dead GTV-6, stymied mechanics
> 
> First, my apologies for double posting--I wasn't sure which address
> for
> the Digest was correct.
> 
> A few weeks ago my GTV-6 (Milano 2.5 engine) stopped dead and acted
> as
> if the fuel pump had failed ---it would start, run feebly, and die if
> you tried to give it gas.
> 
> Mechanic number 1 replaced the filter (he didn't ask if the one in
> there was new, which it was!) replaced the double relay, and told me
> it
> was fine.
> 
> Two days later it died on the freeway.
> 
> Towed to mechanic two, who replaced the ignition module (on the left
> front fender toward the front) checked the injectors (they were all
> pulsing) the fuel pressure, the oxygen sensor wire, and went through
> everything in the Alfa diagnostic book he could find. Somehow,
> between
> the evening before, when there was feeble spark (which he fixed) but
> the injectors were pulsing fine, the next morning the injectors
> stopped
> pulsing. He has swapped the ECU for another. He is now baffled, says
> I
> have to tow the car away from his shop, and that he can't find the
> problem.
> 
> As a result, I missed the Laguna time trial and lost (or didn't get
> anything for) a bunch of money.
> 
> Please, someone out there tell us where to look--Two mechanics and
> one
> owner are baffled!!
> 
> Thanks,
> 
> Alan Lambert
> --
> to be removed from alfa, see
> /bin/digest-subs.cgi
> or email "unsubscribe alfa" to majordomo@domain.elided
> 
> 


=====
Best Regards,

Alan Lambert
--
to be removed from alfa, see /bin/digest-subs.cgi
or email "unsubscribe alfa" to majordomo@domain.elided