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Fuel Pump/Electronic Injection Mystery 200 1989

posted by  Schneller on  Tue Apr 19 14:34 CST 2005
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The saga continues. Recap: 1989 200 wagon, no juice to the fuel pump, or fuses. Error code 1-4-4. I have put in a new fuel pump relay, and a few of you have replied with helpful info about bridging the relay to check and jump power. (Relay does click). In the meantime, a neighbor helped me find a used, tested ECU 951, which I have YET to install.

My friend, Mike, is helping me fix the car. He is a BMW guy and his comments from workin gon the car once are as follows:


"From a BMW guy just trying to help.
I tested these items with a digital voltmeter to find no signal at all with the ignition on, and while cranking.

Fuses 1-10.. No power.
Leads at the fuel pump.. No power.
Leads at main 25 amp fuse while jumped.. Power.
Pluged new fuel pump into leads, cranked motor, no reaction, no vibration, no power.

Tested all leads to ground on fuel pump relay with ignition on, only found power to two of the six prongs. Not knowing what I was looking at for lack of a Bently manual, I have no idea what this means.
Tested each and every fuse for continuity, then tested to ground, and couldn't find power on any but #11 and the was around half of the battery was output at best.

All of this leads me to the ECU.. I dont know enough, but if the ecu is bunk on the e28 bimmer, signals will not be routed.. Just trying to help.."


Thanks!

AP
--
'73 164E/'76 240SW/80 240SW/89 240SW @315Kmiles!






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