This was my first car and I parked it many years ago and when I did it wouldn't rev over 4000 when in gear and wouldn't go over 45mph. When I parked it the dash lights only consisted of the gas light and the check engine. The other day I was pissing around and decided what the hell maybe I'll fix it. I jumped it took a few tries but it started up and ran pretty shitty at first. I let it run for a bit and it cleared up. So I took it around the yard and back the drive way and I still it wont go over 45mph it shifts gears but has nooo power. Any ideas? I did change the air intake temperature sensor and the only dash light on now is the gas light. I hooked up a code reader and no codes are showing.It sounds like its missing a bit but wouldn't that throw the check engine light?

 

what engine is in it? could be dist. if a 2.5 and they are big bucks timming belt jumped? cat conv plugged? need to do a fuel pressure test also fuel filter could be plugged or bad pump

 

May sound stupid but is the throttle cable loose?

Ya second thought is timing is off and doesn't advance right

 

Plugged exhaust?

 

Tested all the spark plugs it is getting spark to all of them and it looks about equal amount of spark. The timing belt is tight and looks to be in good shape. I don't have the tool or knowledge to tell wether the timing is off. It will set and run for hours tho and it doesn't run rough until your start giving it gas. The cat was removed all ready because I thought that was the problem If it was fuel i don't think I could get it to rev to red line in neutral.
If a fuel filter clogs then you get a rough idle and it will bog down when you give it quick blips of the throttle right? The fuel pump is running I can here it kick on. Throttle cable is tight. I would blame it on the battery but its only 4 years old and when i parked it 4 years ago it was new and doing the same thing. I will test the fuel pressure tho. I wonder if there is a sensor that monitors transmission speed and the fuel system together?

 

I imagine you checked your vacuum lines?

 

Yes and no I checked all the ones I can see and find... But that doesn't mean I found them all a vac line is almost a guarantied check engine light tho. This is driving me nuts if it will rev to redline in neutral and wont go over 4 in gear it has to be a sensor I would think. I have a parts car im tearing apart looking for all the sensors then looking them up based on placement as to wtf they are. So eventually I will probably find one that sounds like it might help.

 

is this a 2.5 v6 engine? if so will need a dist. been a very common thing with these having been a chrysler tech for 30 years i have seen alot of this problem! chrysler cert. crossfire tech also

 

I am sure you are incredibly knowledgeable, but most of us here who have been to a stealership have not been impressed with the 'certified XF techs'. Unless they own one or used to work for Mercedes, they are generally not very helpful....

 

That's what i was getting around to posting when the website kept going down last night.

I would start with checking the distributor cap but it's probably a timing problem with your distributor.

 

I think you need to add more blue.. specifically convoluted tubing everywhere. That and a spectre filter; you'll be flying.


If its been sitting, the fuel system is likely gummed up. I would try a big bottle of techron with a fresh tank of gas first, then a tuneup (plugs, wires, filters).

 

just trying to help is that what we are here for grumpy

 

Luckly for OP the Cirrus wasn't made in Germany