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how do you replace a 92 sc400 fuel pump?

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Old 11-15-08, 01:53 PM   #1
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Default how do you replace a 92 sc400 fuel pump?

A little back story I tried jumping the fuel pump ecu by going from Fp to +B and I still get the stumbling, jerking under heavy accelerating. I found out that I didnt have the spark plugs torqued down all the way and that took some of it away, its not as violent when getting on the gas. Also I'm about 4 pounds low on my fuel pressure. My line if thought was that the fuel pump ecu wasnt going over from 9v to 12v under load.
So long story short I want to try to replace the fuel pump? How do I do it? Also who makes a drop in replacement, I thought I read somewhere maybe on one of the Aussie sites that Bosch(?) needed some wiring mods to work right?
Is the Python or Walbro fuel pump a direct drop in or do you need to fab it up?

And I thought this was weird, I notice a slight beeping as I'm starting it up, it almost sounds like its coming from the rear of the car.
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Old 11-15-08, 04:03 PM   #2
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4 psi should not cause your issue...
-cody: maintenance forum moderator
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Old 11-16-08, 09:56 AM   #3
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I tried messing with the TPS in one position I got it so that if I let off the gas while driving I could feel the car kinda lurch like if you where driving in first and let off, so I re-tweeked and got so that it stalled at a stop light, re-tweeked and now its better but on hard acceleration it still seems to miss. Any ideas?

If its still the TPS does anyone have what the ohms are supposed to be across the pins and the pin out for the TPS, I found on it some Aussie site but I didnt book mark it
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Old 11-16-08, 09:56 AM

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