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smaller fuel pump?


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Pulled my sending unit since it wouldn't come on and the hard lines are about shot but found this when comparing it to the new one

 

It fits perfectly in the new (used) unit I got and everything lines up

 

Triple checked numbers and they are the right parts

Any ideas?

 

89 6cyl long bed

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I know when I did mine a few days ago there were two pumps depending on TBI or MPI setups. Walbro and Bosch are listed for the 4.0 (mine is 88) but the Bosch is the correct one for MPI which I believe most of ours are. Though the two were very different as the Walbro uses a different mount and filter system. The new (correct) bosch was smaller than the original too and looked much like yours, though a little bit different.

 

I took a pic of the Walbro next to the OEM before returning it (wrong on the left, original on the right)

 

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