Vibrating upon hard start up.

20

Asked by Feb 21, 2017 at 10:48 PM about the 1991 Pontiac Grand Prix 4 Dr LE Sedan

Question type: Maintenance & Repair

I have a 91 pontiac grand prix 93k miles on it
in amazing shape. Here lately I have noticed
my car starts a little rougher when it is
warmed up, the idle is worse than normal
but not terrible, and upon accelerating it
shakes what it feels like is the engine, it gets
worse once it shifts into 3rd gear and I have
to pull over and restart it and that fixes it.
Please help.

3 Answers

96,265

Your car probably needs a tune up. Your car is probably OBD1 so get the codes read or do it yourself.

1 of 1 people found this helpful.
20

I have brand new plugs, do I need a full tune up or would that be enough? No codes are thrown.

1 of 1 people found this helpful.
75,645

Yes, a full tune up is the first thing you need to do. New spark plugs, spark plug wires, distributor rotor and distributor cap. Also check for weak spark once the engine is warmed up. Could be a failing ignition control module or ignition coil. Your car needs to have a tune up every 30 months or 30,000 miles. Whichever comes first. So at 93,000 miles your right at the tune up interval. HTH. -Jim

Your Answer

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 2,455 nationwide Grand Prix listings starting at $1,900.

ZIP:

Pontiac Grand Prix Experts

  • #1
    Js08016
    Reputation
    4,580
  • #2
    Tom Demyan
    Reputation
    3,170
  • #3
    munron
    Reputation
    2,600
View All

Related Models For Sale

Used Pontiac Bonneville
4 Great Deals out of 409 listings starting at $1,995
Used Pontiac Grand Am
952 listings
Used Ford Mustang
344 Great Deals out of 42,034 listings starting at $1,488
Used Chevrolet Camaro
378 Great Deals out of 31,274 listings starting at $3,495
Used Pontiac Firebird
7 Great Deals out of 693 listings starting at $2,850

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
8 Great Deals out of 384 listings starting at $1,900
2007 Pontiac Grand Prix For Sale
333 listings starting at $4,499
2006 Pontiac Grand Prix For Sale
3 Great Deals out of 437 listings starting at $4,000
2005 Pontiac Grand Prix For Sale
314 listings starting at $3,000

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.