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1999 Saturn SL2 accelerates when hitting the braks
I don't understand this one. When I approach a stoplight and hit the brakes,
the motor starts revving up, as if I am hitting the gas pedal. Another thing; my "check engine" light came on as soon as I left one of these oil change places. I thought maybe a wire had been accidently knocked of from a downstream sensor until the mechanic explained that there is no downstream sensor. OBD problem..........................O2 Sensor, slow response. I went down into the oil change pit so I could get a better look at things. The mechanic explained that this vehicle has only one O2 sensor, and that nobody had knocked any wires off. It could have been a fluke. Is it true, that there is only one O2 sensor on a 1999 SL2? I am not sure what to make out of this one. Has anybody seen this problem? Thanks in advance! Pete |
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#2
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1999 Saturn SL2 accelerates when hitting the braks
Pete KE9OA wrote:
> I don't understand this one. When I approach a stoplight and hit the brakes, > the motor starts revving up, as if I am hitting the gas pedal. does it happen all the time? If it happens more with one pair of shoes they may be the problem... (I notice that I can heel-toe much better in tennis shoes than boots or sandals). > Is it true, that there is > only one O2 sensor on a 1999 SL2? There are 2 - one in the manifold, one after the catalytic converter. |
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1999 Saturn SL2 accelerates when hitting the braks
On Mar 26, 2:05 am, Kevin > wrote:
> Pete KE9OA wrote: > > I don't understand this one. When I approach a stoplight and hit the brakes, > > the motor starts revving up, as if I am hitting the gas pedal. > > does it happen all the time? If it happens more with one pair of shoes > they may be the problem... (I notice that I can heel-toe much better in > tennis shoes than boots or sandals). > > > Is it true, that there is > > only one O2 sensor on a 1999 SL2? > > There are 2 - one in the manifold, one after the catalytic converter. Most likely there's an air leak in the hose to the brake power booster. Check this first. |
#4
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1999 Saturn SL2 accelerates when hitting the braks
Thanks folks! I'll check these things out.
Pete "njot" > wrote in message oups.com... > On Mar 26, 2:05 am, Kevin > wrote: >> Pete KE9OA wrote: >> > I don't understand this one. When I approach a stoplight and hit the >> > brakes, >> > the motor starts revving up, as if I am hitting the gas pedal. >> >> does it happen all the time? If it happens more with one pair of shoes >> they may be the problem... (I notice that I can heel-toe much better in >> tennis shoes than boots or sandals). >> >> > Is it true, that there is >> > only one O2 sensor on a 1999 SL2? >> >> There are 2 - one in the manifold, one after the catalytic converter. > > > Most likely there's an air leak in the hose to the brake power > booster. > Check this first. > |
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