Possible Fuel Pump Failure

Submitted: Wednesday, Oct 08, 2003 at 20:06
ThreadID: 7685 Views:1351 Replies:4 FollowUps:3
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I have a 92 GQ Nissan Patrol on duel fuel (Gas/Petrol) 4.2 litre fuel injected 4wd.
When driving on petrol and the fourby under load eg: (towing/car load) it just all of a sudden losses power, i have nothing. I then have to flick it over to gas to go again. My thought is the fuel pump it dying under load, can't put out the extra pressure when under load. Does anyone have any suggestions. As a fuel pump is going to cost me $400.00 from nissan i need suggestions to fix this annoying problem. Please help.

Azza
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Reply By: Willie - Wednesday, Oct 08, 2003 at 20:25

Wednesday, Oct 08, 2003 at 20:25
It is possible that your fuel pump is dying. Have you checked your fuel filter? Could you fit a $70 electric fuel pump to a fuel injected system?. If so remember to fit the pump as close to the fuel tank as possible.
Cheers
WillieNever a dull moment
AnswerID: 33170

Follow Up By: Member - Ross- Wednesday, Oct 08, 2003 at 21:34

Wednesday, Oct 08, 2003 at 21:34
Yeah .. check the filter, could have some crap in it which is closing off the line under load then clearing up when idling or stopped.Rosco
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FollowupID: 23748

Follow Up By: Member - Ken - Wednesday, Oct 08, 2003 at 22:58

Wednesday, Oct 08, 2003 at 22:58
Double yeah! to the filter check mate.

However, make sure you check the whole line as I have had three personal episodes with blocked filters and they all exhibited exactly the same symptoms as you describe.

However in two of these cases changing the main/usual/visible filter did absolutely dick all as one of the vehicles had a factory fitted second filter cunningly hidden externally up in a rear wheel arch, and the other had a second filter ( bleep y little ryco) fitted by an unknown, but 'well meaning' service mechanic at some point in time.

That was well disguised as well.

As no one knew about them they were never serviced and yep! chock a block with all sorts of crap.

Just a thought that may help you before splurging on a new pump.

Regards

Ken Robinson
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FollowupID: 23760

Reply By: Member - Ken - Wednesday, Oct 08, 2003 at 23:00

Wednesday, Oct 08, 2003 at 23:00
Sorry,

Forgot to include, have you checked the pump for flow and pressure.

Ken
AnswerID: 33196

Follow Up By: uppy - Thursday, Oct 09, 2003 at 08:49

Thursday, Oct 09, 2003 at 08:49
Hi Ken my fuel pump just went wiz bang ,with on sign at all. it just stopped working. I had to replace it at the 400$ price.No problems now and seems to get better milage, My truck is a gq 4.2 efi petrol 1994
regards uppy
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FollowupID: 23772

Reply By: Mick - Thursday, Oct 09, 2003 at 09:59

Thursday, Oct 09, 2003 at 09:59
Check repco out, i bought a pump for $350 for a gq shortie.
AnswerID: 33215

Reply By: azza - Thursday, Oct 09, 2003 at 22:19

Thursday, Oct 09, 2003 at 22:19
Hi Guys......Thanks for the tips/advice so far. I have replaced the fuel filter. To my knowledge there isn't a second filter anywhere but i am now going to have a really good look just in case. I have done a fuel presuure test it passed with flying colours but the car was at idle. This should have been done under load some how. I have thought of a dyno test......worth a try i suppose. I look forward to more tips.

Azza
AnswerID: 33285

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