3000 rpm

[ls2002ls]

HI guys, so i have a 2002 ls v8 bought new in dec 2001. I have 39,000 miles on it. Today driving home on the highway doing 70 to 75 miles an hour half mile from home breaking for a red light i had to press hard on the brake to stop and thats when i notice my car was revving above 2000 rpms in gear out of gear it would stay at 3000. got home and parked the car in my driveway with engine running had some antifreeze on the ground. looks like its coming from the thermostat cap. its wet around that area. all hoses are dry and degass bottle is dry. its only down a little. i replaced all hoses degass bottle put in aluminum tower a few years ago. there is anti freeze on some electrical wiring plugs on the driver side front. turn car off restarted still 3000 rpms.. no warning lights on dash wont be able to check and codes till tomorrow. Any ideas. Thanks Nick love my ls

 

[ls2002ls]

HI guys, so i have a 2002 ls v8 bought new in dec 2001. I have 39,000 miles on it. Today driving home on the highway doing 70 to 75 miles an hour half mile from home breaking for a red light i had to press hard on the brake to stop and thats when i notice my car was revving above 2000 rpms in gear out of gear it would stay at 3000. got home and parked the car in my driveway with engine running had some antifreeze on the ground. looks like its coming from the thermostat cap. its wet around that area. all hoses are dry and degass bottle is dry. its only down a little. i replaced all hoses degass bottle put in aluminum tower a few years ago. there is anti freeze on some electrical wiring plugs on the driver side front. turn car off restarted still 3000 rpms.. no warning lights on dash wont be able to check and codes till tomorrow. Any ideas. Thanks Nick love my ls

so no codes ordered idle air control valve from rock auto coming in a few days. found the anti freeze problem,, bad clamp. fixed it.

 

[Buckie]

so no codes ordered idle air control valve from rock auto coming in a few days. found the anti freeze problem,, bad clamp. fixed it.

Yea the IAC Valve is the first thing i would suspect when having a idling problem and no codes. Any air hissing sounds? I would also check my vaccum system for any dryrotted or broken hoses. Post back an let us know what you figure out.

 

[Firebrian]

I'd check that the throttle linkage or throttle cable is not sticking anywhere.
You can do that in the engine bay OR by feeling the response of the accelerator pedal.

 

[ls2002ls]

I'd check that the throttle linkage or throttle cable is not sticking anywhere.
You can do that in the engine bay OR by feeling the response of the accelerator pedal.

Thanks for the reply Firebrian. linkage is good. changed out the iacv. rpms does not stay a 3000. on cold start it goes to 1800 and slowly drops down to 900 but when i press the gas pedal it stumbles. have a new tps coming in a few days. also going to clean the mass air flow sensor. car has only 39000 miles on it. great shape inside and out. this is the first time i have this problem.

 

[ls2002ls]

Yea the IAC Valve is the first thing i would suspect when having a idling problem and no codes. Any air hissing sounds? I would also check my vaccum system for any dryrotted or broken hoses. Post back an let us know what you figure out.

Hey Buckie. i put in a new iac got a tps on the way no air hissing sounds. its not stuck at 3000 rpms like before also got a torx screw driver on the way in so i can clean the mass flow sensor. justs doesn't idle right.

 

[Buckie]

Hey Buckie. i put in a new iac got a tps on the way no air hissing sounds. its not stuck at 3000 rpms like before also got a torx screw driver on the way in so i can clean the mass flow sensor. justs doesn't idle right.

What brand IAC valve did you buy? I have to say nothing beats Motorcraft. I know motorcraft is expensive but its expensive for a reason its always the best choice when it comes to the Lincoln LS. There was a post on here not too long ago a guy replaced his IAC with a aftermarket one and his LS still wouldn't run right. He went and bought a Motorcraft IAC valve an it fixed his problem. I know thats not the answer you wanted to hear. It was hard for me to believe a new aftermarket IAC gave the LS problems but before you throw alot of uneccesary money at you're car do you still have you're old IAC? You can always try cleaning it up and then spray a little lubricant on it and take a screwdriver and press it up and down to make sure its opening and closing then stick it back on to see if it straightens the idle out. It might just be gunked up and sticking open. Since the idle has come down with the new IAC thats what i would try before i just started replacing parts. Let me know how it goes.