Hi All, Iv been having a nightmare for a while, iv been trying Australian(im from Ireland, but live in Aus) forums, but no luck. So thought I would try here.
Ill copy & paste my posts from the other forum. The good thing about duel fuel is it heps eliminate a good few things !
*sorry for the waffle !*
Post 1
Hey All, My car is a 2000 Nissan Pathfinder ST with 135,000 kilometers. I bought the car about 3 months ago. Iv been having an ongoing problem for the last 2 months. The car runs fine on LPG, but on petrol its cutting out. At first I thought it was dirty fuel. So, long story short, after doing lots of things, I eventually emptied the tank, and changed the fuel filter(actually changed it twice). The fuel that came out seemed dirty & oily to me, so I figured I had solved the issue. Put 20 litres in and it ran fine, cut out once early on. Then filled up & it ran for half a tank. Tonight I take it for a run and now its started cutting out again regularly. This can happen at any time, be it idle, cruising whatever. As soon as it cuts out, if im going fast enough and put my foot down, it will get going again. But if im stopped at lights or something, I have to put it in park & start it up, usually starts on first of second turn. The fuel pump seems fine, as thats how I emptied the tank. Unless its intermittently stopping working(do fuel pumps do this?). The weird thing is its fine on LPG. So im at a loss, and thinking I should just give it to a mechanic and get him to solve it. Cause its now pi**ing me off !!
Post 2
Gave it to the mechanic today. There was proper fuel pressure, but low fuel flow. Doesnt quite make sense to me, as I think they are the same thing ?? But maybe im wrong ?????? He said that a new fuel pump was his diagnosis. To be fair he did explain further as to why they would be different, but I was in the office and distracted by something really important so wasnt really listening properly. Anyway, thankfully, I had already located & removed the fuel pump access panel when presented to them, which was under the back seat. So I knew that would save the task of the tank being removed, and hence a **** load of labour costs. He did say its was a bit of a pain in the ass, which I can well believe, as its such a tight space working through a tiny access panel. Again being fair, he said it might be somewhere around $320 to $380, and I asked if he could try to keep it to $300, with no promises is something else popped up. Arrived to collect it & it was exactly $300, so I really think he was being fair. He could have easily got away with $350, and I wouldnt have complained. Labour:$180(1.8 hours testing for faults & also the actual fitting of the fuel pump) Pump : $93 GST: $27 Total :$300 Im off on a 200kms run tomorrow for work, so I will see how she goes. I think ill run a few tanks of petrol through her and see how she goes, no LPG for a while! Based on this => http://www.aamcovenice.com/4-common-...-pump-failure/ which I read last night Its very similar to my problems, so perhaps this is it ! Fingers crossed !!
Post 3
*UPDATE* All went fine for about 200kms, then the b1tch started acting up again ! So at this stage, fuel filter changed twice, fuel emptied, and fuel pump changed. Total bill so far, $400. Excluding the axle stands, jack, injector cleaner(x2). I checked the spark plug leads for tightness, and the MAF for dirt, this evening but all looked good, air intake bolts were a bit loose but thats all. Was going to work through the ECU diagnostics i found on the net, but that requires taking out the front seat. As my garage is tiny and poorly lit and its getting late, ill do it on the weekend. But while sitting there she's idling on petrol reading the service manual regarding the ECU, I was playing around with putting her in the different 4WD modes, and out again listening to the servos/motors, & she kept cutting out. Hmmmm. So I put on all the lights, radio, aircon, wipers etc and changed 4WD modes, while running LPG and she was running fine, never cut out at all, and idle was fine !! Did the same again on Petrol, and 3 out of 4 times she stuttered & then died ! So any ideas ?????? At least I can now sit with the mechanic and demonstrate it cutting out ! I know the battery is old and should probably be replaced anyway, but that doesn't explain why its cutting out as its the same battery on LPG or petrol. However there is an issue with the higher demand of petrol required by the increased electricity. So, does this help pin it down at all ?