Re: Spirit engine problem fixed....now the %&*^$ SX/4
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Re: Spirit engine problem fixed....now the %&*^$ SX/4



Marty,

Are all of the ground straps on the engine? The older sixes have one that goes between the engine and engine crossmember by one of the motor mounts (I think someone has said it switched sides over the years, both of my American's have it on the driver's side). Computer controlled cars typically have several ground straps so there may be more than one. You should also check to make sure that any installed ground straps are good (no broken wires, not corroded) and that they're contacting bare metal at both ends. It would also be a good idea to check the negative battery cable to make sure it's good and is also touching bare metal where it attaches to the engine and to the body.

Resistance does increase with heat so somewhere you have a bad ground strap or corroded connection that needs to be cleaned.

Matt

At 05:31 PM 6/25/2005 -0700, you wrote:
OK, latest update...it is electrical and not fuel.
Checked spark from the coil and the plugs and it was
weak and then non-existant.  Pulled out the TSM and
did some T/S w fol results:
-ign coil primary circuit checks out ok
-coil checks out ok
-per TSM removed coil wire from distrib and
disconnected 4 wire connecter from ign control
unit(icu)...no spark as it said there should be...
-connected ohm meter btw D1 from icu and batt neg and
had 2.6 ohm reading which TSM says is bad ground (less
than .002 is acceptable).
-I traced the D1 wire in the wire diagram and it goes
to the B1 connector from the distrib (this is the
ground wire)
-checked B1 to batt neg and it read 2.6 ohms
indicating a bad ground of the distrib
-removed the distrib and checked the area around the
distrib hole and the distrib hold down and it showed
good ground
-With distrib out of car rechecked continuity of B1
ground and it was good!
-reinstalled distrib and checked continuity numerous
times and it showed good
-attempted to start car and it fired right up
-let car warm up to reset timing, had timing reset and
dropped idle back to curb and car stalled...wouldn't
restart...same indications as original
-disconnected distrib connector and checked B1 and it
showed 2.6 ohms again indicating a bad ground!
It appears that engine heat is somehow causing the
ground to fail in the distrib.  Is this
possible/probable?  The distrib is a new/rebuilt unit
that has a lifetime warranty so I can take it back.
Just wondering if I'm wasting time doing this.  Is
there another way to ground the distrib to check out
the theory?  Thanks.
Marty

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mhaas@xxxxxxx Cincinnati, OH http://www.mattsoldcars.com 1967 Rambler American wagon 1968 Rambler American sedan =============================================================== According to a February survey of Internet holdouts released by UCLA's Center for Communication Policy, people cite not having a computer as the No. 1 reason they won't go online.







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