Be prepared for a long post.
Background: This vehicle has a new starter, alternator, fuel filter and complete tune up(plugs, wires, cap, rotor) with in the last two weeks.
It was around zero degrees F last night. This morning I start the 62 up and it starts great! however the high idle kicks in and it is no big deal right? Well the high idle starts to fluctuate a lot like it can't decide if it is warming up or not. the fluctuations started almost imediately with in 1 minute after startup. So I let it go, not knowing if this is normal, and it keeps doing this? Once it gets warm it idles down to the appropriate 600 rpms. Then When I drive it and put it in park the idles shoots up to 900-1500 depending on how it feels that day? So what gives with the fluctuating high idle? Is there a temp sensor that is going bad?
As far as the high idle goes after driving I assume my "TPS" needs a check and adjustment? However could a Leaky Brake booster cause a high idle situation? HOw do I tell if the booster is leaking? WHen I go to stop I stop fine but if I let up on the brake once then aply again I get more posotive feel. There are no leaks in the system so is my booster bad or do my rear brakes just need adjustment?
I think that makes a short story long so can anyboddy help me out? I am fairly mechanicaly sound where I have built engines bfore, but When it comes to modern vacuum and idle circuits I am just trying to catch up. Thanks for you help so far and look forward to a lot of responses.
-Seth in Wisconsin
Background: This vehicle has a new starter, alternator, fuel filter and complete tune up(plugs, wires, cap, rotor) with in the last two weeks.
It was around zero degrees F last night. This morning I start the 62 up and it starts great! however the high idle kicks in and it is no big deal right? Well the high idle starts to fluctuate a lot like it can't decide if it is warming up or not. the fluctuations started almost imediately with in 1 minute after startup. So I let it go, not knowing if this is normal, and it keeps doing this? Once it gets warm it idles down to the appropriate 600 rpms. Then When I drive it and put it in park the idles shoots up to 900-1500 depending on how it feels that day? So what gives with the fluctuating high idle? Is there a temp sensor that is going bad?
As far as the high idle goes after driving I assume my "TPS" needs a check and adjustment? However could a Leaky Brake booster cause a high idle situation? HOw do I tell if the booster is leaking? WHen I go to stop I stop fine but if I let up on the brake once then aply again I get more posotive feel. There are no leaks in the system so is my booster bad or do my rear brakes just need adjustment?
I think that makes a short story long so can anyboddy help me out? I am fairly mechanicaly sound where I have built engines bfore, but When it comes to modern vacuum and idle circuits I am just trying to catch up. Thanks for you help so far and look forward to a lot of responses.
-Seth in Wisconsin