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Old 04-20-2014, 04:47 PM
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lsmalley lsmalley is online now
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Join Date: Oct 2006
Location: California
Posts: 2,176
Quote:
Originally Posted by Elektri View Post
Monitor electrical power to the fuel pumps when driving. And/or monitor fuel pressure while driving.

Note: My A/C fan was acting up - not working sometimes, maybe once every 4 days it would briefly go off. So I set up a voltmeter to monitor the power going to it... Well it NEVER did it again! (These things know when you are watching and will then behave... )
Monitored the power to the fuel pump and though I originally had a faulty fuel pump, turned out to be the MAS unit. I swapped it out with a known good one and still stalled out. So far I have ruled out all electrical ignition components and narrowed it down to a fuel related problem since spraying carb cleaner in the air intake seems to make the car start up after a stall. IF I don't spray the carb cleaner after a stall it will just crank and crank. So this is what I have done/replaced:
1) 2 new fuel pumps (replaced)
2) fuel accumulator (replaced)
3) MAS unit (replaced/tested)
4) ovp (replaced)
5) EHA (tested)
6) fuel pressure regulator (p/n 0438161001) (tested)
7) fuel pump check valves (replaced)
8) IACV + hoses (replaced)
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1990 190E 3.0L
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