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Old 08-17-1999, 12:53 PM
Paul F
Posts: n/a
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
85 190E
85 Toyota 4X4

Old 08-17-1999, 08:02 PM
Alain V.'s Avatar
Senior Member
Join Date: Aug 1999
Location: KS.
Posts: 476
When was the last time the fuel filter was changed?
Old 08-17-1999, 09:40 PM
Registered User
Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
IF the fuel filter is not at fault, I have seen fuel pump(s) cause this!!


Old 08-18-1999, 09:24 AM
Paul F
Posts: n/a
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
85 190E
85 Toyota 4X4
Old 08-18-1999, 08:37 PM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
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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