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#1
09-01-2004, 09:05 PM
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Help ..190E 2.3 question
I have an 86 190E 2.3 and looking for some help..
When you start the car it runs 3 seconds and then dies immediately..I figured out that the pump shuts off ??......I bypassed the fuel pump relay like I saw on a post to test the fuel pump and the car runs great.. So I replaced the fuel pump relay and the OVP but that has not worked and the car still dies..I have checked every fuse in the car and most of the electrical wires....Is there anything else that sends a signal to the fuel pump relay that I am missing....or any idea why my pump shuts off.. I have been trying to figure this out for some time with no success...plus I have no Benz dealer or technician in my area..... Has anyone ever seen this type of problem...any suggestions ??...Please help me get my old girl back on the road ...I miss driving my Benz 
Last edited by graybenz190E; 09-01-2004 at 09:10 PM. 
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#2
09-01-2004, 09:29 PM
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During cranking the fuel pump relay is activated by the starter. Once the engine is running the fuel pump relay evaluates the engine speed signal "TN' for engine speed of 300rpms. If that condition exists the fuel pump is continued to be energized.
I have had 190e 2.3s that had an ignition controller problem that caused no speed signal. Without speed signal the fuel pump relay shuts off.
__________________
Steve Brotherton Continental Imports Gainesville FL Bosch Master, ASE Master, L1 33 years MB technician
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#3
09-02-2004, 07:50 AM
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Great.... Thanks for the advice I will have a look at that...
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#4
09-10-2004, 04:02 PM
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Thanks Steve for the great advice..
I changed the ingnition control unit today and the car started and runs great... Eric graybenz190E 
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