What effect does an air leak at the servo have? My car starts but struggles to run and then dies when pumping the throttle. In the brief time the engine was running I found an air leak where the plastic elbow enters the servo. Would this explain my poor running?
Air Leak At Servo
Started by
Guest_mark clark_*
, Mar 02 2014 03:19 PM
7 replies to this topic
#2
minimanclive
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One Carb Or Two?
- Location: Bromley
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Posted 02 March 2014 - 08:50 PM
If it's sucking in extra air then it's going to make the engine run too lean if it runs at all.
#3
Guest_mark clark_*
Guest_mark clark_*
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Posted 02 March 2014 - 09:51 PM
That's what I was thinking. Will have to see if the poor running's sorted after fitting the new grommet I've ordered.
#4
dklawson
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Moved Into The Garage
- Name: Doug
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Posted 03 March 2014 - 03:21 AM
A vacuum leak at the brake servo connection can make for a very hard to start engine and one that will only work with the choke on or throttle held open. A quick check is to remove the servo hose from the intake manifold. Plug or cap the connection on the manifold to make sure it is sealed, then take the car for a short drive. If the engine runs better you'll know the air leak is responsible.
The servo is not necessary for the brakes to work, it just reduces the amount of pedal effort. During your test drive, if you notice no difference in braking effort, it indicates that your servo has probably had the vacuum leak for quite a while and you've gotten used to the increased effort.
#5
Guest_mark clark_*
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Posted 03 March 2014 - 02:39 PM
Cheers Doug, much appreciated.
#6
Posted 03 March 2014 - 02:45 PM
If its an 89 on car the grommets that take the elbow do tend to go, we stock these on their own as you only used to be able to buy them with a rebuild kit
#7
Guest_mark clark_*
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Posted 04 March 2014 - 05:36 PM
Cheers Simon, but I already have one on order.
#8
Guest_mark clark_*
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Posted 07 March 2014 - 12:45 PM
So I replaced the grommet....no change. I decided to check the electrics by swapping parts from one car to another and lo and behold yet another s**t condenser. After going through about 4 between both of my cars in the last 18mths, it's time to go points free I think.
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