Fuel pump problem........!!!!!!!!!!!

[MK3MAD]

Just wondering if anyone can give me a straight answer of why my new HEAP (astra estate 1.4 MPi) keeps blowing up the injection pumps?
I brought it off ebay and the bloke was selling it due to the same reason,
i fitted my 2.0 redtop pump and was going fine and hen that packed up,

i tried the old one an now it was working again, so i put that one back in, was working ok again, sudenly it stoped again, i thought t was the fuel pump relay or maybe a bad connection somewhere,
so i put a live wire straight to the pump as well as a good earth to elliminating the problem, yeeeaaahh,

it started working again, but then guess what, its dead again, any suggestions willbe great, many thanks before hand

 

[Alex]

Where did you put a live wire straight from? As tbh that does sound like the relays on it's way out

 

[MK3MAD]

i put the live straight from the ignition live straight to the pump itself, its had 3-4 new fuel pump relays already mate, something is telling me that there is excesspreasure in the fuel return and making the pump work to hard if that makes any sence

 

[Alex]

Could be try running a fresh return

 

[MK3MAD]

do you think it could be the FPR stuck to hi such i dont know.....more than 5,6 or maybe 7 bar?

 

[Alex]

Doubtful, the fpr's are fixed rate as long as it is the orignal fpr and hasn't been damaged

 

[MK3MAD]

come on peeps, shorly someone must have a good explaination......?

 

[tabetha]

Either loads of crap in the tank is getting in, the mesh only stops thinks like sticks, logs etc not fine stuff, or as you say I would make sure the return was clear.
Just take return off where you can, disconnect from tank and use air line to check if clear, I would also do the same for the feed line after taking off from fpr and pump.
I would also make sure the earth is good by running a seperate wire into the existing one from a known good earth point, body etc.
tabetha

 

[Twelfty]

so when you say the pump is blowing up do you thinking its burning out or otherwise?

also did you fuse the live you ran?

 

[MK3MAD]

yes the pumps keep burning out and no i aint fused the pump with the direct feed