Author Topic: Aftermarket fuel pump (Read 3086 times)

firestorm13666 · « **on:** March 22, 2006, 07:56:59 pm »

Well after i got my new starter in and she starts right up and i get it around the block to a friends she will not start angin at all.I replaced the factory fuel filter is a small see throuth one for the time being because no one around here has one.Well i know the dring back valves in the fuel line are back and well i think who ever had the car last put in this aftermarket fuel pump to try to fix this problme and well i think the pump is bad now.The pump is one like J.C. Whitneyhttp://www.jcwhitney.com/autoparts/Product/tf-VehicleBrowse/s-10101/Pr-p_Product.CATENTRY_ID:2005671/showCustom-0/p-2005671/N-200731802+111+1986+600010927/c-10114sells.I am need help on what should i replace it with and what i can do to replace the cheak valves also and any other help i can get.Thanks

firestorm13666 · « **Reply #1 on:** March 22, 2006, 08:08:49 pm »

I did have a idea but i do not know what would be better a inline electric pump like what is on it now or get a mechanical pump for a older rabbit that bolts to the block but i have no idea if that would even work.Thanks for any help guys

tylernt · « **Reply #2 on:** March 23, 2006, 05:07:50 pm »

The injection pump is actually two pumps. One vane pump to draw fuel from the tank, and another high pressure pump which actually injects fuel into the engine. If your vane pump half is weak or broken, you can install an inline electic pump to get fuel from the tank to the pump. There are a couple of folks that have done it successfully. You may want to use a different fuel return OUT bolt on top of the injection pump though, it is kind of restrictive and you don't want to burn up your electric pump.

firestorm13666 · « **Reply #3 on:** March 23, 2006, 06:56:34 pm »

It has one on it now and i think it is bad and was wondering what would be the best pump to replace it with.Like PSI,gallons per hour and so on would be best.Thanks for any help

QuickTD · « **Reply #4 on:** March 24, 2006, 07:49:45 am »

Quote

You may want to use a different fuel return OUT bolt on top of the injection pump though, it is kind of restrictive and you don't want to burn up your electric pump.

You don't want change to "OUT" bolt. If you remove it the pump housing cannot be pressurized. Housing pressure is used to control timing, without it the timing advance will not function. Even a weak transfer pump will likely produce some housing pressure at speed and allow the timing to advance, even a little is better than none...

Most low pressure automotive fuel pumps can run into a dead head all day without trouble so I wouldn't worry about the restriction. A pump designed for use with a carburated gasoline engine should work fine as a booster pump. ~5-7psi would suffice. Higher pressure pumps may cause excessive housing pressure and timing advance at idle.

fatmobile · « **Reply #5 on:** March 24, 2006, 01:51:18 pm »

I don't know what kind of car we are taling about but my '91 Golf was a gasser to start with and came with a transfer pump in the tank.
I removed it and put the diesel fuel sender/pickup in but I just got a fuel pressure gauge put on the car and notice it is pulling about 5 in.hg. vacuum at times.
I am going to try putting the gasser transfer pump back in(along with a boost gauge on the fuel line so I can read positive pressure) and see what happens.

hillfolk'r · « **Reply #6 on:** March 30, 2006, 05:39:24 pm »

every industrial situation i have ever seen with a bosch ve injector pump,has a lift pump,,,except vw,,i believe this was a cost issue,,,i use a lift pump from a isb cummins,dodge truck,latemodel 24v ya know the model truck???it gives 15 psi all the time at the injector pump inlet,,i mounted it back near tank,,i have an a1,and its in the spot where a gasser would have a fuel pump,,,dont go mechanical pump,,doesnt flow near enough,,,,,,,also see people at work all the time trying an inline filter,,they dont flow either,,a little dirt kills their flow,,and thenthey wonder why it runs crappy,so try to get that inline filter off there soon