CortinaDave Posted January 19, 2014 Posted January 19, 2014 After 12000 trouble free miles I've hit problems with my ZT CDTi. It's got some kind of kinky low fuel pressure fault.... Won't rev above 2800, no power, kangarooing etc. I've swapped both the in tank pump and the under bonnet pump - no difference. When I unplug the pressure sensor it runs absolutely fine, full revs etc - but occasionally won't start, and cuts out if you give it the gun hard suggesting the sensor isn't at fault, but the fact that unplugging it makes a difference suggests it is a low pressure fault as opposed to a leaky injector etc I've unplugged the MAF, no difference, so now I'm a bit at a loss... My plenum drains are dry and unclogged so I don't think the ECU has had a bath.Any ideas ? I'm considering bailing out and buying the silver J reg calibra on eBay as I need the car for work and can't afford to spend ages/£££ trying to track down an obscure fault, getting stranded at the roadside in the meantime when I should be at work . So 1) any ideas what the fault could be? 2) am I better bailing out, advertising it as spares or repairs and buying that calibra?
Partridge Posted January 19, 2014 Posted January 19, 2014 SCRAP IT IT'S A ROVER. I'll ask Mr H of AR what he thinks is going on... Junkman and CortinaDave 2
CortinaDave Posted January 19, 2014 Author Posted January 19, 2014 Only when I unplug the pressure sensor. Being a 53 plate it's not OBD compliant annoyingly Partridge 1
cort16 Posted January 19, 2014 Posted January 19, 2014 If it was a dribbly injector it'd probably be smoking. It could be on of your injectors isn't firing for what ever reason have you checked all the connections etc? You could pull the injectors but you might need the assistance of iron man.
alf892 Posted January 19, 2014 Posted January 19, 2014 iS there another pump? I had 5 seires with same symptons and it was the middle pump..... Pump in tank was low pressure supplying middle one which then supplied the HP one. If middle pump is iffy it cannot supply enough fuel at high demand times with result as you describe
CortinaDave Posted January 19, 2014 Author Posted January 19, 2014 There's a high pressure pump as well.. But apparently it's very unusual for the HP pump to fail- that coupled with the unplugging of the low pressure side sensor leading to power being restored leads me to think the fault is on that side rather than the HP side... I could be wrong though... I'm a bit out of my depth beyond the basics The middle pump (under bonnet one) was noisy and knackered sounding when I replaced it and the new one is quiet and smooth - but the fault didnt go away... Making me think the fault was the in tank pump, and that the under bonnet pump had burned itself out trying to compensate. Yet changing the tank pump made no difference and disconnecting the pipes to check it seems to be working fine. The only thing I can think if is possibly a partial blockage between the two.
Bren Posted January 19, 2014 Posted January 19, 2014 Sounds like the low pressure side - it will be a case though of how much it will cost v how much it is worth. A 53 plate rover is'nt worth a great deal - unfortunately this is exactly the kind of problem which means many diesels will be fragged, even if the car is otherwise excellent. I am seriously considering going back to pez - less hassle and they warm up quicker in the winter months. Just think, you could have had a nice 406. Twiggy 1
Joey spud Posted January 19, 2014 Posted January 19, 2014 Have you changed the fuel filter yet ?? scruff 1
CortinaDave Posted January 19, 2014 Author Posted January 19, 2014 Yep, first thing I did. Strangely that cured the problem for a couple of days
Guest Tony Hayers Posted January 19, 2014 Posted January 19, 2014 Have you changed the fuel filter yet ?? Yep, first thing I did. Strangely that cured the problem for a couple of days Has to be supply issues of a sort if the change cured it and then returned. Any idea on if the tank is sludged up? As this is the BMW unit what's it lifted from?
saucedoctor Posted January 19, 2014 Posted January 19, 2014 It's the M47R, same as earlier E46 320d. The M47TU is the "Technical Update" with the Piss Flaps, and not used by Rover.
dollywobbler Posted January 19, 2014 Posted January 19, 2014 What's the fuel level like? The saddle tank design can cause issues below quarter of a tank.
Barry Cade Posted January 19, 2014 Posted January 19, 2014 Are you 100% that a diagnostic scanner won't work?
CortinaDave Posted January 20, 2014 Author Posted January 20, 2014 Had a look at the fuel in the tank when the pump was out and it didn't look sludged at all really, the tank seemed fairly clean as far as I could see. I'm still driving it (with sensor unplugged) and have tried filing the tank but that seemed to make no difference either. Tried my own OBD scanner and it wouldn't read, as did the RAC when it initially stranded me a couple of weeks ago on their machine - sod all. The sensor itself is a possibility, but although it runs fine generally with it unplugged, it will cut out if you give it the gun, suggesting that there is a fuel supply problem there rather than a dodgy sensor. I'm baffled
aldo135 Posted January 20, 2014 Posted January 20, 2014 Try Thompsons Motors on Ferry Road Dave, it's the garage behind Howard Johnston's showroom. They are Rover specialists and were good with me and my old ZS Sent from my iPhone using Tapatalk CortinaDave and Fatchance 2
Fatchance Posted January 21, 2014 Posted January 21, 2014 I'd second that. Thompsons keep the plate-spinning exercise of running the Fatchance fleet a viable proposition. The 2004 Rover 75, 2003 MG ZT180 and 1993 416Si all survive as a result of Thompson's skill and knowledge. aldo135 and CortinaDave 2
CortinaDave Posted January 21, 2014 Author Posted January 21, 2014 I'll give them a shout after payday next Tuesday. Currently I have £80 to my name lol. I'd heard there was a garage in cardenden with the rover T4 diagnostic machine who were also pretty reasonable... It's just the thought of running up a big labour bill trying to trace what the bloody problem actually is
Barry Cade Posted January 21, 2014 Posted January 21, 2014 There's a Rover guy in Glenrothes- has a wee unit in Poplar Road, behind Target Tyres. I'd imagine he'd have the right gear as he specialises in them. T4 machine is well outdated now- there are lots of others which do the same and more...
CortinaDave Posted January 29, 2014 Author Posted January 29, 2014 Well the car went into Thomson's motors in Leith this morning as suggested here.... They are proper MG Rover lovers in there... and were all wearing MG boiler suits. They guy was delighted when I turned up in the ZT and chatted on about it/the death of MG Rover for ages. Anyway they ran it through the diagnostics and its flagged up that rather than low fuel pressure the car is drawing in air. Theres a broken in-tank mount that means the fuel pickup is floating in the diesel rather than collecting from the bottom of the tank as it should. Needs a new mount and seal so I'll get them to do that. They spent two hours on it, went over it with a fine tooth comb, did a leakback test on all the injectors etc as well and gave me the report, and put on a new decent brand front tyre. total bill £117 plus VAT. Given the last time i bought a tyre the best deal i could find was a Dai Yung from farmers for £80, (its got 18 inch wheels) Im really pleased with that, and i'll certainly use them again... thanks for the tip! Twiggy, Fatchance, cort16 and 3 others 6
Bren Posted January 29, 2014 Posted January 29, 2014 At least you know what's wrong, and it is'nt going to get fragged.
dollywobbler Posted January 29, 2014 Posted January 29, 2014 Aye, always nice to have a result! Specialists are worth their weight in gold at times. Charlie Croker 1
CortinaDave Posted January 29, 2014 Author Posted January 29, 2014 If I'd known about that place earlier I'd just have taken it there rather than all the farting about trying to diagnose it myself.. Long run it'd have been cheaper. I like having a go myself but when it comes to engine management related issues I'm out of my depth
dollywobbler Posted January 29, 2014 Posted January 29, 2014 The thing is, a lot of garages are too I reckon. You still need to be able to interpret WHY a fault has been flagged. I suspect a lot of garages end up changing all manner of parts before curing a problem. tooSavvy 1
tooSavvy Posted January 29, 2014 Posted January 29, 2014 The thing is, a lot of garages are too I reckon. You still need to be able to interpret WHY a fault has been flagged. I suspect a lot of garages end up changing all manner of parts before curing a problem.Well not quite the same thing, but.... I arrived with a replacement M/Board for a till today. Staff said 'look won't switch on!', pressing 'magic' button under screen.... OK so I swap board - 15 mins - switch on >> nothing!! The screen is connected to the main body by a cable and a snap-latch connector, this was loose. Snapped in - started straight up. Someone vetted the call as 'part required'..... If I had been in to 'diagnose' then the cable connection would have been high up on my list. still, they pay TS
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