Rick Cantellya wrote:

I have a '98 Pontiac Grand Prix (better known as our Grand Pile).
The last few days it has been hard to start and runs rough when
it does.

Back in the old days of mechanical cars I'd suggest looking at the
exhaust smoke during and immediately after start. This because my first
guess is too little or too much gasoline during start.

At some point, it smoothes out and runs fine. I've scanned
it and received the following codes:

P0403 - Multiple Random Cylinder Misfires
P0303 - Misfires on Cylinder 3

I'd ask in an auto, rather than an audio, newsgroup whether "drowning"
can cause this.

Any clues as to the most common cause of these errors?

My logic is that if it was an ignition problem, then it would be likely
to persist after heatup.

Faulty injector or coil pack? If so, any clues as to how to zero
in on the problem?

1) look at or smell (with discretion and caution, I didn't say inhale)
what comes out of the exhaust during a start with misfiring, a
carburation problem appears probable.

2) report finding with a repost of question to auto newsgroups.

Thanks.....

Normally I'd add a "followup-to:" pointing at the appropiate newsgroup,
but I don't know exactly which it would be, please take a new look at
the newstree, there may exist a rec.auto.pontiac.rough-starts or similar
newsgroup or an alt.pontiacowners.support newsgroup or both. Almost
anything you could imagine in terms of newsgroups exist, and quite much
that you couldn't.


Kind regards

Peter Larsen

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