2nd Generation Specific 1986-1992 Discussion

Difference Between Fd And Fc Part?

Old 06-03-2004, 03:57 PM
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Wondering if there is a difference between the FD and FC walbro fuel pumps? I can get FD fuel pump from somebody for ten bucks, and I would like to swap it out since I have not changed my stock one.



Anybody? Would the connections be the same, or would I run the risk of having the walbro pumping too much fuel to the block, and not having enough air to compensate for it, causing me to run rich?



Car is a 88 N/A. Thanks
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Old 06-03-2004, 04:09 PM
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I dont know anything about the connections but I wouldnt worry about going rich. The cars run pretty rich as it is. The danger is running lean.
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Old 06-03-2004, 04:21 PM
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I was told running lean was a good thing? Was I lied to?



Anyone else think the connections would not work?
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Old 06-03-2004, 04:26 PM
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Originally Posted by RowTarEh?' date='Jun 3 2004, 01:21 PM
I was told running lean was a good thing? Was I lied to?



Anyone else think the connections would not work?
Dont worry about the fuel pump Justin. I doubt that is your problem.

Running lean in a turbo charged rotary is bad news. But your N/A so that wouldn't apply to you. BTW for those reading I told him he could have my old Walbro if he wanted it, he is only asking if he can use it. He is not under the assumption that he needs to upgrade his pump.
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Old 06-03-2004, 04:35 PM
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Originally Posted by Fd3BOOST' date='Jun 3 2004, 05:26 PM
He is not under the assumption that he needs to upgrade his pump.
Would be no reason to upgrade the pump, I am not running anything modded that I need to deliver more fuel than the stock pump. Just seeing if it would fit, since I have not changed mine out. And it is probably needing to be changed in the future.



Need to get the thermostat changed and get it started back up again.
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Old 06-03-2004, 05:37 PM
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i could prob go for a new fuel pump
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Old 06-03-2004, 06:11 PM
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A walbro will make a n/a run like ****. It flows more than the fpr can handle, and therefore raises the fuel pressure across the board, causing the injectors to flow more. N/a's already run too rich, you will only make your car run worse.
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Old 06-03-2004, 07:39 PM
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Thanks mazdaspeed7. Just thought it would be worth a shot. Now Dave can sell his fuel pump, or just keep it. Thanks also Dave. I tried.
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Old 06-03-2004, 10:01 PM
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there is a slight difference in the install kit, but i didnt know that when i put mine in and its fine
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