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E30 (1982 - 1993)
God's Chariot. The E30 was produced primarily from 1982 through 1991. The cabriolet was the one exception which was produced through 1993.

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  #1  
Old 02-21-2014, 11:58 PM
1984e30 1984e30 is offline
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Location: california
 
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Mein Auto: 1984 318i
1984 not running properly after engine washing

before you want to start telling me it's wrong, trust me I know, i know the side effects of washing an old dry rotted engine, but i also hate a dirty engine..

anyways: please read FULLY before commenting, thank you.


Anyways, things that arent the problem:
sparkplugs, distrubtor, air flow meter/air intake..


me and my friend did change the fuel filter, and we didn't test to see if it started afterwards, but it was a simple swap(yes the flow arrow pointed in the right direction[up])

anyways, possible culprits:
fuel injectors? how can water affect them?
???


it cranks fine, and can run very rough up until 2.5k+ rpms, if the rpm drops below 1.5k it gets VERY TOUGH to get it to run, and it will most likely die out again..


what we've done:
cleared all electrical connections of water(might've missed something)
checked all fuses due to a closed circuit(from water) all were OK..
took out spark plugs, and cranked engine over(excess fuel came out)
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  #2  
Old 02-22-2014, 07:51 AM
7pilot 7pilot is offline
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Mein Auto: 90 Ford Tempo
It could be that it got flooded when the ignition system was wet, and now the plugs are in need of a cleaning with a heat torch to burn off the varnish, or replacement.
If the plugs are bosch, replace them with NGK

m
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  #3  
Old 02-22-2014, 08:20 AM
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hornhospital hornhospital is offline
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You are getting SOME fuel injector pulses and SOME spark at the plugs (at least some of them), so you can say the ECU is probably OK. I'd still open the glove box, drop the ECU and check to make sure it doesn't have water on/in it.

You didn't eliminate the plug WIRES as being something that "aren't" the problem. If they are old and as dry/cracked as the rest of the rubber bits, you are probably losing most of their spark before they ever reach the plugs. Even a tiny bit of moisture on a plug wire that's dry rotted will drain most of the spark energy or even dead short that wire.

And never say it CAN'T be one thing or another. You don't know that. The parts can look perfect and still not work. A distributor cap can have a hairline carbon trace that kills one or more cylinders. The fuel injectors can have poor connections due to water in the plug sockets. They work some, but not always. Don't be closed-minded about what it can and can't be.

My suggestion in a few words: DRY EVERYTHING AGAIN.
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Last edited by hornhospital; 02-22-2014 at 08:21 AM.
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  #4  
Old 02-22-2014, 01:50 PM
1984e30 1984e30 is offline
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Quote:
Originally Posted by hornhospital View Post
You are getting SOME fuel injector pulses and SOME spark at the plugs (at least some of them), so you can say the ECU is probably OK. I'd still open the glove box, drop the ECU and check to make sure it doesn't have water on/in it.

You didn't eliminate the plug WIRES as being something that "aren't" the problem. If they are old and as dry/cracked as the rest of the rubber bits, you are probably losing most of their spark before they ever reach the plugs. Even a tiny bit of moisture on a plug wire that's dry rotted will drain most of the spark energy or even dead short that wire.

And never say it CAN'T be one thing or another. You don't know that. The parts can look perfect and still not work. A distributor cap can have a hairline carbon trace that kills one or more cylinders. The fuel injectors can have poor connections due to water in the plug sockets. They work some, but not always. Don't be closed-minded about what it can and can't be.

My suggestion in a few words: DRY EVERYTHING AGAIN.

spark plugs, wires, distrubtor, rotor, are all new.. the ecu was fine.
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  #5  
Old 02-22-2014, 06:48 PM
1984e30 1984e30 is offline
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update: it was the air flow meter.
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  #6  
Old 02-25-2014, 04:05 AM
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Nick323 Nick323 is offline
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Quote:
it was the air flow meter
But what ?
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  #7  
Old 02-25-2014, 11:18 PM
1984e30 1984e30 is offline
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Quote:
Originally Posted by Nick323 View Post
But what ?
what do you mean "but what"
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  #8  
Old 03-12-2014, 02:24 AM
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Nick323 Nick323 is offline
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Sorry for getting back so late, as it is hectic here...
I wanted to know what went rong with the air flow meter after the washing ?
Did water get inside & gave incorrect readings on the tracks.
Just for future refference
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  #9  
Old 03-12-2014, 05:59 PM
1984e30 1984e30 is offline
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Quote:
Originally Posted by Nick323 View Post
Sorry for getting back so late, as it is hectic here...
I wanted to know what went rong with the air flow meter after the washing ?
Did water get inside & gave incorrect readings on the tracks.
Just for future refference
Well I'm not sure, it was a friends car. He replaced it after attempting to clean and dry the original to no success..

He replaced it and the car still hasn't ran since, I need to ask him for an update, but I believe they haven't even found out what it is yet.
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  #10  
Old 03-17-2014, 01:51 AM
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Nick323 Nick323 is offline
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Throwing money and parts at a problem, is very comon here
Any issue seems to get dealt with that way. possibly because it is always somebody elses money
And strangely enough it never works
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