Recently had timing belt replaced, but had this problem beforehand. have had 2 different mechanics try and fix, both were unable to solve, both had diagnostics ran. this car also still has check engine light comming on as well as abs light. now the drivers window wont come up. is this car typical of such problems? is there a common electrical or vacuum issue here?
i was able to get it to idle somewhat by adjusting linkage but now wants to idle too fast
should i just send it to the junk yard?
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The engine computer controls idle speed through the idle control valve. Sometimes the air passages this valve controls get gunked up and don't perform well, don't let enough air through. Cleaning them out may help, also give a good cleaning to the throttle body assembly. Use a throttle body cleaner, a good sensor safe cleaner, not regular carburetor cleaner.
Please use a different shop in the future. The fact is if that timing belt broke while the motor was running you most definitely bent a valve or two if not all of them. The 300M didn't use no contact or lock up valves which would have locked them up out of the way when the belt broke. The mechanic that did the repair should have had the head pressure tested and inspected all of the valves. It is possible the problem you are having is a few valves not operating properly however a more likely source is going to be a Crank position sensor or Cam position sensor that is damaged or the internal anti-knock assembly isn't in time with the rest of the motor. There is a slim possibility that when he did the repair he removed the motor and then failed to get it positioned correctly in the motor mounts or possibly didn't get the base cross connecting plate put up correctly as far as being tightened and torqued in. Do a compression check and leak down test on the cylinders to make sure you don't have a leaking valve then start looking at the other items. I seriously recommend you use a different shop than the one that did the timing belt because at this point there should be no question about the valves or rings in that motor. Since the motor was opened up they should have replaced the rings and checked the valves before they ever put it back together.
A timing belt should be good for between 60,000 and 100,000 miles. If there has been some kind of damage to the belt, then you would need a new belt and what ever caused the damage replaced. He is either padding the bill, trying to create business, or there should be two things wrong (something caused damage to the belt it needs to be fixed to). If you replaced the belt your self , take off the cover and inspect it. If you had a different mechanic replace the belt , get his opinion or at any rate get an opinion from a different source. You should not have to replace a belt after 21,000 miles.
How was it running before the work was done? A vacuum line in the wrong place could be holding the EGR valve open. Try unplugging the vacuum line from the EGR valve to see if it idles different. Plug the vacuum line with a small bolt or golf tee
put the crank at TDC and the cam gear and TDC slip the belt on adjust the tensioner and then rotate the engine two times make sure the timing marks are still lined up then put it back together and try it if you have the timing off it wont idle right and if could also be the throttle positioning sensor
1. Had mechanic check timing again. Belt off a couple degrees. Should fix problem.
2. Don't know. this is my son-in-laws car.
4. I think valves were bent due to timing belt breaking and son-in-law trying to start car when it went dead.
5. Will do this if timing belt reset don't work.
Thanks for your reply.