Question about Pontiac Trans

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I have a 91 trans am....it bogs down bad when u press the gas...i have new distibutor,idle sensor,map sensor,fuelpump fuel filter,i have 45psi....im getting a code for est low cuircut....wats that had how do i check it?and when i pulled the knock sensor out water poured out wat could cause this?

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Well EST is electronic spark timing. You will check this at the distributor.
Something is wrong with the distributor, not the distributor itself but the timing is off.
If the timing is on then inspect the connections. You may have accidentally bent over a pin.
But in any case the ECM is picking up a fault in the timing.

Posted on Apr 24, 2010

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Posted on Jan 02, 2017

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Car idles fine, but sputters, bogs and dies if gas pedal is pressed.


new spark plugs this decade. (a tune up?0
the filter is part of all 60k tuneups. letting it clog wrecks good pumps.
my wild guess, its lack of fuel flow, do to old filter.
or low fuel pressure.
car is identical to a Corolla. so is not unique or rare as some Geo cars are.
the cam belt not changes, invites valve kissing piston tops. BOOM
end of engine. (costs more to fix then worth of car)
the word is bogging, my engine bogs
if if bogs WOT (wide open throttle) and dont catch up < ITS NOT THE TPS. ever.
tps bad causes short bogs, called hesitations.
The map sensor , is what measure air flow and the ECU matches fuel to this air flow.
my guess, is it does that, but fuel pressure is like 15PSI, bad.

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