CAR IDLE SPEED FAILED TO DROP BELOW 1100 RPM WHILE breaking
I OWN A 2006 VOLVO S60 WITH A 2.5T ENGINE.THE ENGINE IDLE SPEED FAILED TO DROP BELOW 11 TO 1300 RPM WHILE APPLYING BRAKES .THIS HAS HAPPENED TO ME 4 TIMES SINCE I'VE HAD THE CAR. DEALER CAN'T FIND ANYTHING WRONG.DEALER SAYS THERE IS NO MECHANICAL CABLE TO FUEL INJECTORS, EVERY THING IS ELECTRONIC., AND SINCE I HAVEN'T SEEN ANY TROUBLE LIGHT HE DOESN'T KNOW WHERE TO START. HE CLAIMS HE CALLED VOLVO CORP. AND THEY HAVE NO HISTORY OF THIS PROBLEM. THANK YOU, GEORGE P.S.THE LAST TIME THIS PROBLEM HAPPENED THE RPM WAS AT ABOUT 1300, I PLACED THE TRANSMISSION INTO NUETRAL AND THE RPM WENT UP TO 3200RPM. I SHUT THE ENGINE OFF. RESTARTE ENGINE , NO PROBLEM.
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Re: CAR IDLE SPEED FAILED TO DROP BELOW 1100 RPM WHILE...
This problem is due to the malfunction of the automatic cruise control by the Electronic Engine control Unit, I faced the same problem in my Honda n I rectified the same by simply resetting the ECU. You can simply pul out the cables battery terminals and leave it for 12 hours and fix the same again to sort out the issue.
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well I can't drive it and see all symptoms.
i can't see the idle speed drop below 800 RPM,. !
if the idle drops real low, then engine shakes, and PS gets weaker.
Id ignore the EPS till such time as all other things are perfect.
ever get an engine tuneup this decade?
low engine RPM , top number 1 cause is owners not servicing their cars. (spark plugs bad tops that list)
if you ignore that, tuneup the engine WILL misfire and RPM will drop and P/s (means power steering)will get weak (the assist is pump driven) and then the engine can stall.
i bet you also forgot to say the steering got weak
park or coming to a stop with foot off throttle.
do the head lights dim as this (bad) happens?
can you use your right foot to keep RPM above 800 and save stalls or near stalls?
IF RPM is ok, ?then check the fan belt next. (slips)
or buy a new on, my guess is 11 year old belt is kinda hopeless case.
Trouble Code: P0716
Input Speed Sensor Performance
P0716 The TCM detects an unrealistic drop in input shaft speed. ISS DTC P0716 is not failed this ignition. Transmission input speed is 1,050 RPM or greater for 2 seconds. Transmission input speed drops 1,000 RPM for greater than 4 seconds and does not recover with in greater than 0.80 seconds.
Go to a Volvo mechanic for specific help, they will probably replace a faulty sensor.
What's happening is, the engine is under increase load when the A/C is running. Typically there is a solenoid (near the throttle linkage) that controls idle speed when the A/C compressor (clutch) is engaged. It activates each time the compressor cycles on to regulate the system. If idle returns to normal when A/C clutch is disengaged (or A/C is off), then the solenoid or some signal that controls the solenoid to maintain the idle is the likely to be the problem. e.g. The solenoid fuse maybe blown. This might be a good place to start investigating the problem. Best of luck resolving this problem.
Hi Joseph, When starting the vehicle from cold in cold weather, the RPM can be as high as 1300 and in temperate climates about 1100 RPM. The RPM will drop to normal as the coolant is warmed. Normal idle speed is between 750 for Auto and 650 to 700 for manual transmission. Regards John
Yes, sounds like the idle speed is too high. If you keep driving like that, you will fry the torque converter / turbine. Since idle is computer controlled, you will have to take it for service tune up. There is one possibility that the rich, high rpm idle used for cold start is not disengaging properly after the engine warms up. Air conditioning will raise the idle speed by a couple hundred rpm, so avoid using it until you have the problem fixed. BTW.....warm engine rpm in idle, and neutral should be around 700-800. Anything over 900-1100 will result in a hard shift into 1st gear and dragging at stop lights.
These models had a problem with the electronic control modules, and this is what controls the idle speed. Sometimes they just need to be cleaned, but sometimes they are defective. Volvo has extended the warranty on some of them to 10 years or 200,000 miles if it is found to be defective.