keeps threatening to stall
Moderator: martauto
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Cloggy Saint
- Old Skooler
- Posts: 8024
- Joined: Sun Jan 09, 2005 11:00 pm
- Location: zummerzet
My 320 has developed an annoying problem. Whenever I slow to a standstill and then take it out of gear the revs drop to about 350-400 before picking up to the normal level and idling nicely. I suppose cleaning the ICV would be a good starting point but then what?
E30 zone - promoting adult illiteracy since 2004
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hongkongfuey
- Mad-tango-geezer
- Posts: 3304
- Joined: Fri Jun 08, 2007 11:00 pm
- Location: portsmouth
check for air leaks, air filter dirty? serviced? afm set up properly?
if there wern't people like me,
with cars like mine,
who would you put down to make yourself feel better?
with cars like mine,
who would you put down to make yourself feel better?
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Cloggy Saint
- Old Skooler
- Posts: 8024
- Joined: Sun Jan 09, 2005 11:00 pm
- Location: zummerzet
Regularly serviced and afm should be good. I'll check for air leaks. Cheers.
E30 zone - promoting adult illiteracy since 2004
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mrLEE30
- E30 Zone Team Member
- Posts: 6589
- Joined: Tue Jan 18, 2005 11:00 pm
- Location: Sweating buckets in Bahrain
Good way is to spray carb cleaner on the inlet side with the engine running, any variation in engine speed while spraying is your airleak. Wipe it off after as the cleaner can eat away plastic.
Mine does this to a very slight extent also. All of my inlet pipes have been off (and inspected) and all gaskets changed when I did the head, and I have since searched repeatedly for air leaks by various methods (including the carb cleaner spray) and never found any.
The AFM has been set by a reputable garagae to 1% CO at idle, but does this mean that my AFM is possibly faulty?
It has been adjusted to swipe on new, clean parts of the contact tracks but I guess that's only really borrowing time....
I hate buying parts just to try them out, but I too would like to get rid of this niggle.
The AFM has been set by a reputable garagae to 1% CO at idle, but does this mean that my AFM is possibly faulty?
It has been adjusted to swipe on new, clean parts of the contact tracks but I guess that's only really borrowing time....
I hate buying parts just to try them out, but I too would like to get rid of this niggle.
These are sensations as hard to forget as they are to ignore.....
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Touring_IOM
- E30 Zone Newbie
- Posts: 173
- Joined: Mon Aug 22, 2011 11:00 pm
Mine has also started doing it today; also managed to stall once.
Replaced pipes
Meticulously cleaned intake parts
AFM set at 1%
Replaced intake manifold gaskets
Cant think what else could be the problem, so I am going to check values on components this weekend, make sure they are all in line.
Replaced pipes
Meticulously cleaned intake parts
AFM set at 1%
Replaced intake manifold gaskets
Cant think what else could be the problem, so I am going to check values on components this weekend, make sure they are all in line.
Learning mechanics as I went (rather than from a book or course) it amazed me the huge number of places that an intake leak can occur other than the intake tubes.
Maybe it would be useful to list the tubes / hoses / joins / gaskets that could cause these types of issues.
I'll try to make a decent start working from the AFM towards the motor (thinking of an M20 here):
AFM to throttle body bellow tube and connections at both ends.
Connections to Idle Control Valve including metal elbow into throttle body.
Brake servo pipes and connections at both ends.
Blanking grommet on underside of throttle body.
Throttle body to manifold gasket.
Manifold to head gaskets.
Gasket between manifold and FPR vacuum pipe take off.
FPR vacuum pipe.
Cam cover gasket and half moon rocker shaft plugs.
Oil filler cap seal.
Dip stick seal.
Crank case to manifold breather tube o rings.
Have I missed anything?
Maybe it would be useful to list the tubes / hoses / joins / gaskets that could cause these types of issues.
I'll try to make a decent start working from the AFM towards the motor (thinking of an M20 here):
AFM to throttle body bellow tube and connections at both ends.
Connections to Idle Control Valve including metal elbow into throttle body.
Brake servo pipes and connections at both ends.
Blanking grommet on underside of throttle body.
Throttle body to manifold gasket.
Manifold to head gaskets.
Gasket between manifold and FPR vacuum pipe take off.
FPR vacuum pipe.
Cam cover gasket and half moon rocker shaft plugs.
Oil filler cap seal.
Dip stick seal.
Crank case to manifold breather tube o rings.
Have I missed anything?
These are sensations as hard to forget as they are to ignore.....