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Author Topic: 1.6L Fuel Pump  (Read 401 times)

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Offline homesteadertim

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1.6L Fuel Pump
« on: December 10, 2018, 02:38:57 PM »
Okay, I started a thread (http://www.fordpinto.com/index.php?topic=29035.0) over in the projects area with details about my Pinto wood splitter project.  The specific problem I'm having now is I'm not getting any fuel coming out of the fuel pump.  I think the old one was bad so I ordered a replacement.  Installed it and nothing.  If I manually activate the level on the fuel pump I get fuel (had to replace the line already). 

I've read conflicting things about whether there is a pushrod that drives the fuel pump or if it sits on the cam.  When I took the old one out I didn't see a pushrod in there so I'm not sure.  Any help would be greatly appreciated.  Thanks.

Offline Wittsend

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Re: 1.6L Fuel Pump
« Reply #1 on: December 10, 2018, 05:47:36 PM »
I'm not too familiar with the 1.6 Pinto engine (also called the Kent engine and found in the Cortina). That said, I see nowhere that a push rod would be supported and feel 99% confident it does not have one. The pump drives off an eccentric on the camshaft. That would be the silver metal area you see in the picture.

 If possible turn the engine by hand and watching with a flashlight see if that eccentric is not worn away (it should look like a bump). If possible try and get the raised spot pointing towards the area the pump lever would contact it. Then try installing the fuel pump. You should feel resistance because that 'bump' is what makes the pump lever move. It there is no resistance then the eccentric isn't making contact with the pump. The cause could be the eccentric is worn or the pump is not correct. 
Update:  I magnified the image and it is hard to tell if there is a build up of grime on the eccentric, or there is excessive wear, or there is a designed in channel in the eccentric to stabilize the pump lever.

It could also be that the pump is fine but there is either a clog or a leak somewhere that is causing the pump to draw air. I'm doubting either because you state manually the pump does work when actuated by hand.

  If for some reason the pump can not be made to function there are workarounds. Electric fuel pumps are available all over Ebay for about $15. They will need 12 volts to run but I assume you have a battery/alternator on this engine already. Just make sure you have a switch wired in so you can easily access it and shut the fuel flow off in an emergency.  This is also necessary when you stop the engine or it stalls. The existing mechanical pump opening can just be filled with the old pump, or as is commonly done, a block off plate can be made to cover the opening.

As with all modifications: Do at YOUR Own Risk.

Offline homesteadertim

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Re: 1.6L Fuel Pump
« Reply #2 on: December 17, 2018, 10:09:14 AM »
Thanks for the response.  There definitely seems to be a little groove in the eccentric where the actuator would ride.  Hard to tell if it's worn or not but that'd be my guess.  I've installed the pump about 4 times (with and without a shim it came with) to no avail.  Went ahead and ordered an electric fuel pump to at least get past this problem and on to the next one. 

Will report back once that is done.  Thanks.