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1970's Range Rover Petrol Pump Cutting Out
The facet has a filter in the bottom. It can "stick" and cause the issue you
are having. I had this with a new pump When you turn off the ignition, the filter drops...and fuel will flow again. As far as I recall it unscrews. Check it and make sure it can rise and fall smoothly....also make sure the pump is fitted pointing the right way...... -- Neil |
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#2
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1970's Range Rover Petrol Pump Cutting Out
I'm having a problem with the fuel supply to the engine. Basically the
engine will run fine until all of a sudden it stutters and stops. If i turn the ignition off and on the pump clicks like mad and the engine will restart immediately. It doesn't happen often, but the intervals are not consistant, sometimes it can be a 5 minute gap, then sometimes a 30 min gap. I dont actually know how the fuel pump 'knows when to pump', and was wondering if anyone can enlighten me. Does the pump have some sort of mechanical pressure valve which turns it on and off at certain levels? Thanks for any help. |
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1970's Range Rover Petrol Pump Cutting Out
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#5
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1970's Range Rover Petrol Pump Cutting Out
check tank for any water in it , drain out into tray and let stand for an hour , then check if any water . i had similar problem to you , i had water in my tank . filter is useless one water in it and wont pass petrol . mine happened in winter and the water froze in the filter . the 12v feed wire from pump can get trapped under the pad between body and chassis , mine had this happen . make sure pump body is very well earthed to the chassis . these pumps do have habit of running and then stopping without any warning , and even when you remove and checked them they may not play up . id fit a new fuel pump, cheap from paddocks at £34 + vat or richard at beamends can supply same . loosen fuel line fittings on pump before removing pump from vehicle , use a HEXAGON spanner that has a gap in end of it , ie a brake nut spanner , or youll round the flats off the fuel pipe nuts !!!. im not sure of the size of spanner, 7/16 or 1/2 AF i think . there is a tank drain bung in bottom of tank , or at least my 1975 R/R had one , you can jack vehicle up one side so tank drains all out fully .. i think when you stop and the pump ticks madly, this is because its pumping fuel flat out for some reason , perhaps because pump stopped running whilst driving , or because of a bad wiring connection . i think theres a bullet connector about 6 inches away from the pump , in the 12v wire which is the one running into the CAP in middle of pump, this cap should undo and come away to show the solder connection .. you might have a loose wire connection at the pump body . fit a new pump, new fuel filter, drain tank and check for water . dont forget that the fuel filter housing has the rubber ring in its top and you need to make sure it seals all around the cup properly . i dont think youre getting fuel vapour locks [cavitation ] , but this can happen with unleaded fuel , it happens on some PFA light aircraft that use MOGAS [motoring gas] and doesnt happen when they run AVGAS . .. wrote: > I'm having a problem with the fuel supply to the engine. Basically the > engine will run fine until all of a sudden it stutters and stops. If i > turn the ignition off and on the pump clicks like mad and the engine > will restart immediately. It doesn't happen often, but the intervals > are not consistant, sometimes it can be a 5 minute gap, then sometimes > a 30 min gap. > > I dont actually know how the fuel pump 'knows when to pump', and was > wondering if anyone can enlighten me. Does the pump have some sort of > mechanical pressure valve which turns it on and off at certain levels? > > Thanks for any help. |
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1970's Range Rover Petrol Pump Cutting Out
> wrote in message oups.com... > I'm having a problem with the fuel supply to the engine. Basically the > engine will run fine until all of a sudden it stutters and stops. If i > turn the ignition off and on the pump clicks like mad and the engine > will restart immediately. It doesn't happen often, but the intervals > are not consistant, sometimes it can be a 5 minute gap, then sometimes > a 30 min gap. > > I dont actually know how the fuel pump 'knows when to pump', and was > wondering if anyone can enlighten me. Does the pump have some sort of > mechanical pressure valve which turns it on and off at certain levels? > > Thanks for any help. > Mine had something similar, but on a later model. After three weeks of checking relays and fuses etc. turned out to be the wire to the pump had broken, but was touching most of the time until we went down a mud hole when the mud obviously moved the cable and broke the joint, eventually the sparking made the cable dirty and lost conection. Worth checking the wire. |
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1970's Range Rover Petrol Pump Cutting Out
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#8
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1970's Range Rover Petrol Pump Cutting Out
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#9
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1970's Range Rover Petrol Pump Cutting Out
Thanks for all the suggestions, I think I've found the culprit: the
pump itself. Basically after checking the list of ideas below, I gave the pump a good tap on the top to see what happened; it stopped, another tap and it started again at full tilt. Bugger, should have hit it to start with! I guess the solenoid is sticking or something. 1) I checked the fuel filter, cleaned the magnet etc, 2) Then cleared the inlet of dirt, and the oultlet just incase, 3) Then checked the earth and supply cables, both seemed fine, 4) I have to admit i didn't fancy draining the tank to look for water, so i left that (pleased that i did now....), 5) I have recently had sticky floats and i cleared that up so didn't check that again (also when that happens petrol pours out of the carb breather), 6) I checked but couldn't hear any sucking noises as if air were being drawn in along the supply line, So has anybody got a good spare kicking about, or is somewhere like paddocks my best bet? On another note, I think my fuel system must have been modified because i cant see any 'bleed' back to the tank, or i wander if that only applys to the mechnical pumps? Thanks again. |
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1970's Range Rover Petrol Pump Cutting Out
> Thanks for all the suggestions, I think I've found the culprit: the
> pump itself. Basically after checking the list of ideas below, I gave > the pump a good tap on the top to see what happened; it stopped, > another tap and it started again at full tilt. Bugger, should have hit > it to start with! I guess the solenoid is sticking or something. > If the pump is like the old SU type then it is probably the contacts that close to power the solenoid. They are just like the points contacts in a distributor, and get pitted and burnt. If you are lucky you will be able to get the cover off and clean them up with a fine file or emery paper (if they are not too badly burnt away). Regards Jeff |
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