Intermittent Power Loss in 1989 Chevy G10 Van with 305

There is no pining or other remarkable sound but thanks for the perspective.

It is an early fuel injection, not carb.

Thanks for thinking about this. We are beyond stuck.


"jeffcoslacker" > wrote in message
...
>
> Not getting pinging associated with it when it happens, are you?
>
> The HEI distributors' centrifugal spark advance would sometimes hang
> fully advanced intermittantly (rusty), usually after a hard
> acceleration, then when you stepped down on it again, you'd get flat
> reaction and hard pinging...
>
> Not sure if '89 still had the mechanical advance either...
>
> Is that carb'd or TBI?
>
>
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Today, installing the coil and then an ignition module I looked carefully at
the connectors, as various Chevy shops had claimed to do. In fact the
connectors to the latter were corroded. I suspect this will resolve the
problem and most components are replaced anyway.


"unr" > wrote in message
t...
> Intermittent Power Loss in 1989 Chevy G10 Van with 305
>
> For 10K the van loses power intermittently for 1 to 10 seconds then comes
> back to normal power. It happens at all speeds from thruway to idle. A
> variety of shops including a Chevy dealer have failed to eliminate the
> problem. The following have been checked or replaced: fuel pump pressure
> checked, fuel filter replaced, spark plugs and wires replaced.
>
> Does anyone have experience with this specific probem on this vehicle
engine
> or similar?
>
> Any guidance would be appreciated.
>
>
>

unr Wrote:
> Today, installing the coil and then an ignition module I looked
> carefully at
> the connectors, as various Chevy shops had claimed to do. In fact the
> connectors to the latter were corroded. I suspect this will resolve
> the
> problem and most components are replaced anyway.
>
>
> "unr" > wrote in message
> t...
> > Intermittent Power Loss in 1989 Chevy G10 Van with 305
> >
> > For 10K the van loses power intermittently for 1 to 10 seconds then
> comes
> > back to normal power. It happens at all speeds from thruway to idle.
> A
> > variety of shops including a Chevy dealer have failed to eliminate
> the
> > problem. The following have been checked or replaced: fuel pump
> pressure
> > checked, fuel filter replaced, spark plugs and wires replaced.
> >
> > Does anyone have experience with this specific probem on this
> vehicle
> engine
> > or similar?
> >
> > Any guidance would be appreciated.
> >
> >
> >


This to me was coming across as an ignition module issue, hopefully
cleaning the corrosion fixes it!


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