Sudden spike in fuel consumption.

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Lukus - 24 Nov 2006 15:54 GMT

I posted a problem about my '92 Grand Prix LE (v6 3.1L) a few weeks ago
in here. Changing the Ignition Module seems to have taken care of the
stalling problem. However, since that problem surfaced, my car has
been running horribly.

It never was great on gas but when i first bought the car 4 yrs ago, i
did on average 425 km (264 miles) on a 60L (15.85 gal) tank. However,
ever since my stalling problem, i only do 280 km (174 miles).

Ever since i got the ignition module fixed (using my old coils), the
car hesitates whenever i give it gas from a standstill position (or
even a slow roll). The car is very sluggish... sometimes it feels like
I'm pulling a trailer with a heavy load. My mechanic cleaned the
idling sensor and checked the EGR valve but he can't seem to see what
is the cause.

I'm starting to suspect a transmission problem. Any ideas what could
be the problem here as this came about so sudden.

TIA

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who - 24 Nov 2006 20:46 GMT

> Ever since i got the ignition module fixed (using my old coils), the
> car hesitates whenever i give it gas from a standstill position (or
[quoted text clipped - 5 lines]
> I'm starting to suspect a transmission problem. Any ideas what could
> be the problem here as this came about so sudden.

How is the exhaust? Black soot, depositing on the tail pipe?

Try manually shifting the transmission down then up.
Does that improve the acceleration?

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ROY BRAGG - 24 Nov 2006 22:33 GMT

I had coil packs changed on my Lumina (3.1 engine) and was told the control
module and coils should be changed together. The car may need to have the
onboard computer reset.
Roy

>> Ever since i got the ignition module fixed (using my old coils), the
>> car hesitates whenever i give it gas from a standstill position (or
[quoted text clipped - 9 lines]
> Try manually shifting the transmission down then up.
> Does that improve the acceleration?

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Lukus - 29 Nov 2006 20:19 GMT

> I had coil packs changed on my Lumina (3.1 engine) and was told the control
> module and coils should be changed together. The car may need to have the
> onboard computer reset.
> Roy

How does one reset the onboard computer... i know on the '92 Grand
Prix, the computer isn't that soffisticated.

As far as the exhaust goes, it seems like before.. not noticeable
changes but i fear it may not pass the emission test due this February
since it's running so rich now.

Curious as to what would cause it to hesitate.

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