350 TPI Fiero

[Shannen Durphey]

Don Burns wrote:
<snip>
Yup, and nope, in that order.  You're not looking for scan tool data
here.  You're checking to see how the engine runs.  If the calibration
is close, and the rest of the sensors are reading correctly, the
engine should run well in open loop.  This gives you a "common sense"
reference point if diagnosing the problem starts to lead to strange
answers.

But this is not to be mixed with other tests.  You've already made a
few changes, test them first to see if you've made any progress.

Shannen

It's been 65-70 all day in southern NH, I can't imagine what "hot" is
to a Floridian.


Don Burns wrote:
> 
> Back from the cold north and into the car. Tonight I pulled the connectors
> off of the ECM and used contact cleaner on all the pins/sockets just to be
> sure all connections are at minimum resistance. Last week I found that the
> surface where the ECM is mounted was not bare metal but painted. While
> there certainly are grounds via wires there is nothing like having a solid
> DC/RF ground to the car chassis with all the noise from the engine flying
> around. (ECM is not in engine compartment but just behind it in the small
> luggage area. So we sanded down to bare metal where the mounting nuts make
> contact, remounted the ECM, and believe it or not I think the mileage has
> improved. Will get a better idea in a run to Miami and back tomorrow. Have
> not yet looked at integrator and block learn since this ground improvement.
> 
> Also used some of that white goop from a tube on the hole at the input side
> of the cat to eliminate that leak. The hole was about 1/8 inch diameter.
> But have not yet jacked the car to tighten the two bolts where the pipe
> connects to the manifold.
> 
> Shannen, you mentioned disconnecting the O2 sensor and then observing
> engine behavior. This will force a code 13, will it not? Will the block
> learn and integrator numbers still be useful under these conditions??
> 
> Don
> 
> Don Burns
> Fort Lauderdale FL   USA
> 86GT 350 TPI
> NIFE
> 
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