So recently I've had a mechanic make a valve in the side of my intake manifold to give my fuel pressure reguator a vaccuum, as the previous owner swapped the intake for the 325E on my car with a 325I...
So basically, after swapping the Idle control valve, and installing that valve, the car idles perfectly, AFTER it is initially ran for a minute or two, sometimes not. I theorize this is because of the difference in intake manifold not giving enough vacuum to the fuel pressure regulator until a little bit into running it.
After it has been running for 30 seconds to a minute with throttle, normal driving, it will idle perfectly for the whole time I use it until I turn it off. if I start the car back up right away after recently driving it, it idles perfectly. but if I wait over a half hour it does not. This makes me think that it has to do with the vacuum to the FPR being incorrect due to the intake manifold being for a 325I.....
so basically I'm wondering if my theory is correct here? I would really prefer to do this work myself as I'm sick of either having to drive over 100 miles to a good mechanic or getting ripped off by local mechanics. I typically get a couple days off from work so I should be able to have atleast 2 days to work on this at some point, but for now I consider it completely driveable as it only takes around a minute to achieve this prime running condition. but I'm not satisfied with it so that's why i'm posting here.
here's some old pics of the engine before I had the mechanic install a new valve for the FPR and a new idle control valve. I will take pictures at some point today hopefully.
been trying to figure this out for a little while now and am still really wondering, it idles damn near perfect after it's been drove like 5 mins. (I can still sense a /very/ subtle sputter, but it's still very smooth. when I start it, without fail I /have/ to apply a slight amount of throttle to get it to start up, then it's ok after that.)
So basically, after swapping the Idle control valve, and installing that valve, the car idles perfectly, AFTER it is initially ran for a minute or two, sometimes not. I theorize this is because of the difference in intake manifold not giving enough vacuum to the fuel pressure regulator until a little bit into running it.
After it has been running for 30 seconds to a minute with throttle, normal driving, it will idle perfectly for the whole time I use it until I turn it off. if I start the car back up right away after recently driving it, it idles perfectly. but if I wait over a half hour it does not. This makes me think that it has to do with the vacuum to the FPR being incorrect due to the intake manifold being for a 325I.....
so basically I'm wondering if my theory is correct here? I would really prefer to do this work myself as I'm sick of either having to drive over 100 miles to a good mechanic or getting ripped off by local mechanics. I typically get a couple days off from work so I should be able to have atleast 2 days to work on this at some point, but for now I consider it completely driveable as it only takes around a minute to achieve this prime running condition. but I'm not satisfied with it so that's why i'm posting here.
here's some old pics of the engine before I had the mechanic install a new valve for the FPR and a new idle control valve. I will take pictures at some point today hopefully.
been trying to figure this out for a little while now and am still really wondering, it idles damn near perfect after it's been drove like 5 mins. (I can still sense a /very/ subtle sputter, but it's still very smooth. when I start it, without fail I /have/ to apply a slight amount of throttle to get it to start up, then it's ok after that.)
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