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#1
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Hi all,I'm having an odd problem with my 85 190E. It started on my way back from KC sunday night. With the cruise set at 100, suddenly I notice when going up hills the speed would start dropping. At first I thought the CC amp was failing again, but then when I applied some throttle it
appeared to have a dead spot. If I backed off and then tried again it pulled strong, back up to 100 and higher. It would continue to lose power intermittently. When I stopped to get fuel I noticed the whine of the fuel pump not to be a constant buzz like normal. It was kind of a "pulsating buzz". Could this be related to the problem I am experiencing? I have noticed it doing this at lower speeds as well. It did it while accelerating from a stop, started sputtering, when backed off the go pedal and applied throttle again it smoothed out and accelerated normally. What are symptoms of the fuel pump going bad? FWIW, I did repair the fuel pump relay a few months back and inpsected it again yesterday.. I don't suspect that its bad, but who knows... Any ideas guys? Paul Finnessey toyo22r@yahoo.com 85 190E 85 Toyota 4X4 |
#2
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When was the last time the fuel filter was changed?
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#3
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IF the fuel filter is not at fault, I have seen fuel pump(s) cause this!!
------------------ Benzmac: ASE CERTIFIED MASTER AUTO TECHNICIAN SERVICE MANAGER FOR 14 BAY FACILITY MERCEDES SPECIALIST 8 YRS PARTNER IN MERCEDESSHOP.COM |
#4
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I replaced the fuel filter approx. 3 months ago. Oddly I filled the tank yesterday morning and drove to work and back, it drove normally. Could i have possibly got a bad tank of gas? I'll keep inform if it acts up again, I havent listened to the pump to see if it is still "pulsating", could a pressure regulator cause this? thanks
Paul Finnessey toyo22r@hotmail.com 85 190E 85 Toyota 4X4 |
#5
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At the speed you are talking about I believe that you have pushed the pump past its capacity. Later models have 2 smaller pumps.
Perhaps the reason the relay had to be repaired is the the pump draws too much current(over 10a). |
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