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Discussion Starter #1
hey guys I've just got an 85 528e and was in the process of tunning it up.
I cleaned the intake system first cause of a sticky throttle and at the same time the map sensor. It had alot of gunk in the piping and around the butterfly.
Now my problem is it wont run. I't's starts for like 2 seconds and then dies

So my question is which area should i check first? before i go into the wrong area

I took the plug of the maf sensor to see whats in it. Don't have a book yet. they look like contact points on the inside. any harm in soldering them down?

I took the Tb off to clean it but didnt put the new gasket in it yet

Any help would be appreciated. Thanks :)
 

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catso
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3,160 Posts
hey guys I've just got an 85 528e and was in the process of tunning it up.
I cleaned the intake system first cause of a sticky throttle and at the same time the map sensor. It had alot of gunk in the piping and around the butterfly.
Now my problem is it wont run. I't's starts for like 2 seconds and then dies

So my question is which area should i check first? before i go into the wrong area

I took the plug of the maf sensor to see whats in it. Don't have a book yet. they look like contact points on the inside. any harm in soldering them down?

I took the Tb off to clean it but didnt put the new gasket in it yet

Any help would be appreciated. Thanks :)
What did you clean the Air Flow Sensor (MAF) with? It's a very sensitive electronic device. Your model also has a cold start valve. The procedure for testing it is well described in the Bentley.
 

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Discussion Starter #3
i used brake parts cleaner to clean out the flap and surrounding area. it looks like the electronics are all on top over the flap so i might try the gasket first
 

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catso
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Can it harm it to clean out inside around the flap with spray?
It's not the cleaning that would harm it, it's the type of solvent in the cleaner and whether it's compatible with the device. They make a special MAF (and electrical device) cleaner. The throttle body is mostly metal and carb cleaner probably is OK to use to get the gunk off. I regularly use it to clean my Idle Air Control Valve.
 

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Discussion Starter #6
turns out when i put the plug back in on theb afm i moved the contacts that move around the track. Bent them back and all good now so the start die thing is the afm maf whatever it's called on these cars.
 

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catso
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turns out when i put the plug back in on theb afm i moved the contacts that move around the track. Bent them back and all good now so the start die thing is the afm maf whatever it's called on these cars.
:dunno: So does it now run better after cleaning the Air Flow Sensor with carb cleaner?
 

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Discussion Starter #8
no real noticeable difference
im gonna try tightening up the spring a bit. Having a problem with mid range power. could still be intake or exhaust but the car doesn't smell rich so im gonna give it a try
Someone has already adjusted it before. The cap was glued down and theres marks on the gear inside.
 

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catso
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no real noticeable difference
im gonna try tightening up the spring a bit. Having a problem with mid range power. could still be intake or exhaust but the car doesn't smell rich so im gonna give it a try
Someone has already adjusted it before. The cap was glued down and theres marks on the gear inside.
What about the ignition system; plugs, wires, cap, and rotor. Have you checked/replaced any of these? How old is the Oxygen sensor?
 

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Discussion Starter #10
20 years? lol i dunno got another 2 accords to swap before i start on it again, but that and the timing belt water pump oil pump and whatever else i notice will be on the list soon
 
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