We recently replaced a timing belt on a 2006 Mitsubishi Galant, but now when you drive the vehicle at highway speeds the rpms run high like its not going to the next gear. What might the problem be?

SOURCE: 2003 Mitsubishi Galant ES Clunking noise

the first thing i would check is the sway bar bushings they usualy go first. you have a bushing out somwhere. ive replace many struts because people have requested new struts and when we install them they come back and complain that the clunk is still there and all it needed was a bushing kit for $20
hope this helps

Marvin

• 85242 Answers
• Posted on Jan 13, 2009

SOURCE: dodge ram 1500 engine rpms surge at freeway speed

those sensors could cause the issue, clean the MAF 1st, also clean the idle system using the following procedure, the IAC can cause cruise surge. I use this to cure these problems all the time.

Here is the most common cause of surges and stalls and low idle, it is the idle speed control air-bypass valve (IAC) and throttle valve, they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

SOURCE: Hammer H1 / 2006. While driving engine cuts off.

Two year old vehicle. You have warranty. Take it to the dealer and tell em to fix the problem.

SOURCE: need to know about changing the timing belt on my 2001 mitsubishi

This will take about 3-4 hours. If you look at the drive belts, they will all have to be taken off to get to the timing belt. The engine crankshaft has to be positioned for marks to line-up. The crankshaft will have to be prevented from turning so you can take off its drive pulley. Rotate until the alignment cylinder is near TDC, remove sparkplug, then packing a small rope on top of the piston prevents the engine from turning.. Once you change one timing belt, you will never buy another car with a timing belt again. You can get a manual on eBay.

SOURCE: Mazda 626 'HOLD' light after gear box oil seal was replaced

I have the same problem with my car I think its the torque converter clutch but you should visit a diagonestic machine just to find out