1999 bonneville changed the thermostat now it wont start

Asked by Nov 26, 2016 at 08:42 PM about the 1999 Pontiac Bonneville 4 Dr SE Sedan

Question type: Maintenance & Repair

ok so this site wont let me reply to anyones
responses and i need some help.  so ill start
from the begining..i was getting ready to leave
for the day and checked the oil.  it said it was
around a half a quart low so i added around
400 mls thinking i should be fine. i then drove
to town (20 miles) and the car started running
like crap and over heating. so i stopped and
had some lunch and checked the oil and it
seemed to be overfull. so i went straight home.
(i did not over heat the car at any point) and
changed the oil and filter and got it to the
correct level. it then continued to over heat and
run poorly. i then noticed it was out of coolant
and that the radiator hose to the thermostat
would vacuum shut while the car was running
so i changed the the thermostat and then the
car would not run anymore. i tried
disconnecting the battery to rest computor and
that didnt help and im pretty sure its not the
security system. also not leaking coolant. the
car started and drove fine (other than
overheating )before i changed the thermostat.
and i put the old one back in and tried to start it
just to make sure that wasnt the problem. any
help is appreciated but as i said for sone
reason i cany reply to responses to thankx in
advance

1 Answer

79,135

Check for spark. The overheating may have burned out the ignition control module or the crankshaft position sensor. An easy way to check for spark is spray some starting fluid down the throttle body. If it runs a few seconds you have spark and it's a fuel problem. HTH. -Jim

Your Answer:

Pontiac Bonneville Experts

  • #1
    ticklemedaly
    Reputation
    400
  • #2
    Js08016
    Reputation
    380
  • #2
    dandyoun
    Reputation
    380
View All

Related Models For Sale

Used Pontiac Grand Prix
14 Great Deals out of 1,756 listings starting at $800
Used Chevrolet Impala
375 Great Deals out of 25,636 listings starting at $950
Used Pontiac Firebird
6 Great Deals out of 682 listings starting at $4,700
Used Chevrolet Camaro
237 Great Deals out of 27,289 listings starting at $2,077
Used Ford Mustang
266 Great Deals out of 37,717 listings starting at $1,350
Used Chevrolet Malibu
489 Great Deals out of 51,427 listings starting at $1,995
Used Chevrolet Monte Carlo
4 Great Deals out of 940 listings starting at $2,950
Used Buick LeSabre
1,262 listings starting at $1,750
Used Pontiac Grand Am
719 listings starting at $1,900
Used Buick Regal
85 Great Deals out of 3,942 listings starting at $5,300

Used Cars For Sale

2005 Pontiac Bonneville For Sale
46 listings starting at $3,800
2003 Pontiac Bonneville For Sale
42 listings starting at $1,900

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.