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Idle Problem
Hi,
I have a 2000 Grand Cherokee Laredo w/ 4.7 V8. Sometimes when it is idiling in park the engine will surge. The tach starts rising and falling just below and just above 1,000 RPM. It doesn't do it all the time and restarting will usually stop it for a while. I took it to the dealer a few weeks ago and they said it was a dirty air filter. That didn't stop it so before I spend more $$ does anyone have suggestions? The Jeep has 68K miles. Thanks for any help, Brandon |
Re: Idle Problem
"Brandon" <jusomeguy2@yahoo.com> wrote in message news:ba93099.0405051918.1d2e4e06@posting.google.co m... > Hi, > > I have a 2000 Grand Cherokee Laredo w/ 4.7 V8. Sometimes when it is > idiling in park the engine will surge. The tach starts rising and > falling just below and just above 1,000 RPM. It doesn't do it all the > time and restarting will usually stop it for a while. I took it to the > dealer a few weeks ago and they said it was a dirty air filter. That > didn't stop it so before I spend more $$ does anyone have suggestions? > The Jeep has 68K miles. > > Thanks for any help, > Brandon Sounds like symptoms of an idle air control (IAC) valve, but it's just a guess without testing it. Sometimes they just need a good cleaning. Maybe someone else can confirm this for you. Chris |
Re: Idle Problem
"Brandon" <jusomeguy2@yahoo.com> wrote in message news:ba93099.0405051918.1d2e4e06@posting.google.co m... > Hi, > > I have a 2000 Grand Cherokee Laredo w/ 4.7 V8. Sometimes when it is > idiling in park the engine will surge. The tach starts rising and > falling just below and just above 1,000 RPM. It doesn't do it all the > time and restarting will usually stop it for a while. I took it to the > dealer a few weeks ago and they said it was a dirty air filter. That > didn't stop it so before I spend more $$ does anyone have suggestions? > The Jeep has 68K miles. > > Thanks for any help, > Brandon Sounds like symptoms of an idle air control (IAC) valve, but it's just a guess without testing it. Sometimes they just need a good cleaning. Maybe someone else can confirm this for you. Chris |
Re: Idle Problem
"Brandon" <jusomeguy2@yahoo.com> wrote in message news:ba93099.0405051918.1d2e4e06@posting.google.co m... > Hi, > > I have a 2000 Grand Cherokee Laredo w/ 4.7 V8. Sometimes when it is > idiling in park the engine will surge. The tach starts rising and > falling just below and just above 1,000 RPM. It doesn't do it all the > time and restarting will usually stop it for a while. I took it to the > dealer a few weeks ago and they said it was a dirty air filter. That > didn't stop it so before I spend more $$ does anyone have suggestions? > The Jeep has 68K miles. > > Thanks for any help, > Brandon Sounds like symptoms of an idle air control (IAC) valve, but it's just a guess without testing it. Sometimes they just need a good cleaning. Maybe someone else can confirm this for you. Chris |
Re: Idle Problem
"Brandon" <jusomeguy2@yahoo.com> wrote in message news:ba93099.0405051918.1d2e4e06@posting.google.co m... > Hi, > > I have a 2000 Grand Cherokee Laredo w/ 4.7 V8. Sometimes when it is > idiling in park the engine will surge. The tach starts rising and > falling just below and just above 1,000 RPM. It doesn't do it all the > time and restarting will usually stop it for a while. I took it to the > dealer a few weeks ago and they said it was a dirty air filter. That > didn't stop it so before I spend more $$ does anyone have suggestions? > The Jeep has 68K miles. > > Thanks for any help, > Brandon Sounds like symptoms of an idle air control (IAC) valve, but it's just a guess without testing it. Sometimes they just need a good cleaning. Maybe someone else can confirm this for you. Chris |
Re: Idle Problem
Maybe the throttle position sensor?
Brandon wrote: > Hi, > > I have a 2000 Grand Cherokee Laredo w/ 4.7 V8. Sometimes when it is > idiling in park the engine will surge. The tach starts rising and > falling just below and just above 1,000 RPM. It doesn't do it all the > time and restarting will usually stop it for a while. I took it to the > dealer a few weeks ago and they said it was a dirty air filter. That > didn't stop it so before I spend more $$ does anyone have suggestions? > The Jeep has 68K miles. > > Thanks for any help, > Brandon |
Re: Idle Problem
Maybe the throttle position sensor?
Brandon wrote: > Hi, > > I have a 2000 Grand Cherokee Laredo w/ 4.7 V8. Sometimes when it is > idiling in park the engine will surge. The tach starts rising and > falling just below and just above 1,000 RPM. It doesn't do it all the > time and restarting will usually stop it for a while. I took it to the > dealer a few weeks ago and they said it was a dirty air filter. That > didn't stop it so before I spend more $$ does anyone have suggestions? > The Jeep has 68K miles. > > Thanks for any help, > Brandon |
Re: Idle Problem
Maybe the throttle position sensor?
Brandon wrote: > Hi, > > I have a 2000 Grand Cherokee Laredo w/ 4.7 V8. Sometimes when it is > idiling in park the engine will surge. The tach starts rising and > falling just below and just above 1,000 RPM. It doesn't do it all the > time and restarting will usually stop it for a while. I took it to the > dealer a few weeks ago and they said it was a dirty air filter. That > didn't stop it so before I spend more $$ does anyone have suggestions? > The Jeep has 68K miles. > > Thanks for any help, > Brandon |
Re: Idle Problem
Maybe the throttle position sensor?
Brandon wrote: > Hi, > > I have a 2000 Grand Cherokee Laredo w/ 4.7 V8. Sometimes when it is > idiling in park the engine will surge. The tach starts rising and > falling just below and just above 1,000 RPM. It doesn't do it all the > time and restarting will usually stop it for a while. I took it to the > dealer a few weeks ago and they said it was a dirty air filter. That > didn't stop it so before I spend more $$ does anyone have suggestions? > The Jeep has 68K miles. > > Thanks for any help, > Brandon |
Re: Idle Problem
Classic spark plug misfire.
God Bless America, ßill O|||||||O mailto:-------------------- http://www.----------.com/ Brandon wrote: > > Hi, > > I have a 2000 Grand Cherokee Laredo w/ 4.7 V8. Sometimes when it is > idiling in park the engine will surge. The tach starts rising and > falling just below and just above 1,000 RPM. It doesn't do it all the > time and restarting will usually stop it for a while. I took it to the > dealer a few weeks ago and they said it was a dirty air filter. That > didn't stop it so before I spend more $$ does anyone have suggestions? > The Jeep has 68K miles. > > Thanks for any help, > Brandon |
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