My 92 Bonneville stalls when breaking to a stop. Sometimes it stumbles but
doesn't stall. Rarely but it may stumble or even stall when driving with my
foot off the accelerator for maybe 15 or 30 seconds. Works OK when driving
and if I accelerate hard it doesn't seem to hesitate and continues to run OK
as I accelerate normally. It runs somewhat rough at idling, but not all the
Any help would be appreciated.
Odds are its one or more of these. Take them all off, clean and check them.
TPS, MAF, IAC, throttle body.
Check the IAC with a 9v. battery. Check the TPS with an ohmmeter.
Can't do much with the MAF except clean it.
If the throttle body has never been cleaned since new, then it is really gunked
up by now.
Same with the other parts.
Clean the PCV, too.
I had a few cars do that to me. The RPM gauge was also dropping well below
the level required to keep the car running (the gauge would usually drop
below 500 or so, then the car would quit). It turned out the ECM or
computer module needed to be replaced. A great place for Bonneville info is
www.bonnevilleforum.com You won't find a site with more information
anywhere, and the people will reply with a good answer usually in minutes.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.