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RE: [T3] Fastback Troubles...engine still missing - update


-----Original Message-----
On 30 Dec 2001, at 15:44, Christopher Sheridan wrote:

>> I changed the fuel filter, reset the points, rechecked the timing and
>> the idle and still had the miss...read Jim's post about changing the
>> voltage regulator to a new one and went out and did it.

From: Jim Adney

>I gave you something to check and a cure if the check pointed to a
>bad VR. If you just start replacing parts based on possibility it can
>get expensive very quickly.

I agree. So far I've had all the new parts already on hand waiting to be
installed.

>You'll build up your understanding and save money at the same time by
>learning to diagnose and eliminate possibilities. Please don't just go
>grasping at straws.

Yes I agree and I'll try.

>Did you do the voltage test? If so, what did you learn?

no. I just replaced the voltage regulator. I had two new ones still in the
yellow and red boxes sitting on my shelf. Though I intend to test the
voltage
tomorrow when I have an opportunity to see that I'm over the 13.? as
suggested.

>If it still misses, I'd put in a fresh
>set of plugs because it could well be that the old ones were fouled
>by the rich mixture before you changed the VR.

It does and I will. Took it 30 miles round trip in the rain last night and
it ran
well, except wanted to stall at the stoplights and did once. And the idle
seems too low.
Took it 60 miles round trip this morning and it ran good again with the same
problems.


>Secondly, it's awfully easy to fall into the trap of blaming the FI for
>faults just because you are having a hard time finding the cause.
>Certainly the FI is a possibility, but so is the ignition, and most
>miss problems like this turn out to be ignition problems.

Okay. Will go back through the ignition again....could worn trigger points
or a worn
distributor shaft cause a miss such as this, or just hunting?


>> questions:
>> 1) ..the idle adjustment screw range doesn't seem to raise the idle above
800rpm...

>Are you doubling the 8 cyl reading as you need to for the 4 cyl
>engine?

Yes, but I'll triple check.


>> 2) I noticed what Muir calls a Fuel Dampner in-line between my fuel
>> pump and the motor,

>They aren't really necessary, and the only way that they fail that
>I'm aware of is that they rust thru and leak.

Thank you. I will go back over the ignition, electrical grounds, do a
voltage test,
recheck vacuum leaks, and then finally look at fuel pressure and injection
as a last
resort.

-Chris

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