engine running fault

[Simond]

Hi everyone Im a newbie on here joined up and hope someone can help.

I make kitcars for a living and the terrano is my tow vehicle for towing my cars and my caravan from time to time, had a couple of months hasnt missed a beat until now. Lent the car to a friend to pull his caravan as he bought the caravan which was way to big for his car to tow !!!!!!!!!

He had booked his hols felt sorry for him lent him my terrano.

Day before had been to Durham from manchester and back with a car on a trailer no problems at he towed van Manchester to Lincoln no problems,but on the way back going along 60mph powered dropped off to a crawl 30mph.
Pulled in got AA out couldnt sort it car got recovered back. I know my way around kitcars but not terranos yet.

This is what i have found.
car came back on a recovery truck,after AA looking at it it came back with with a leak off pipe leaking diesel not refitted properely. I have repaired that engine starts 1st time and ticks over perfect,no smoke nice clean exhaust emission.When you blip the throttle stationary slight shudder miss can be felt through the car comes on between 2000-2500rpm and a bit of puff of smoke whiteish I think as it misfires.

We blipped it a couple of times then the car would only rev to 2000rpm no misfire or smoke but with the throttle pedal pressed to the boards.

Turned it off restarted it,started 1st time, even idle tickover, engine sounds sweet, then drove it up the road seemed to go ok no miss no noises, but if you rev stationary stil has the miss at 2-2.5rpm
The fuel filter was new in Decemebr I have fitted a new maf sensor today but seems the same,the aa reputedly removed the small filter in the top of the injection pump below the banjo bolt,although i may recheck this myself to check for dirt. I am stuck now where to go next.

I drove the car again up the road and its seems to go ok when driven although I havnt tried it under load towing,but still has the mis when revved stationary.I should also mention that engine management light isnt coming on all the lights go out as they should.

Any ideas suggestions welcome.

thanks in advance.:thumb2

 

[R1cho]

i had misfire after having fuel line replaced, after a time it sorted it's self out, as did the revs, not much help i know but maybe your truck just needs a bit of time. P.S welcome to the club

 

[jims-terrano]

I'd be tempted to replace fuel filter again but use a different brand. Some of the cheaper filters don't seem to seal correctly and let air in to the system.

Jim

 

[Fez_uk]

common place for the fuel pipes to leak are around the drivers side rear axle. I made a guide which you can see in the downloads section.

Worth a poke around there.

 

[Simond]

Thanks for the welcome and replys so far gives me something to have a look at.
Had a read through some of the posts badgers post re a little valve on the fuel pump sounds interesting,any one else fitted one and had a good result.

When I first got the car it ran fine but I thought it was a bit sluggish but assumed this is how they are,after coming out of a bmw 528I petrol estate,
seemed to go at the same speed towing or solo.
So maybe the perfermance has been on the decline,as with many things you dont always notice if it happens gradually.

hope it something simple like fuel filter fuel line etc,but its the old needle in the haystack, guess will have to elimenate what i can then put some new parts on. no one near me seems to have a code reader that fits the car My mate has snap on Modis but dosnt have a key for it,even the AA man didnt have anything he could plug in to get a fault code off it, also dont want to take it to Nissan to many beer tokens. Anyone in the Manchester area can look at these Im in Oldham to be exact. for a fault code read not sure if there will be anything in there as no engine light on,but at least its something else checked.

thanks

 

[MudLifeCrisis]

http://www.nissan4x4ownersclub.com/links.htm

How to read fault codes can be found here about 29 down in downloads

My computer won't let me open it but this should show you how to do it using a paperclip ;O)


Apologies if Im wrong


Brian

 

[Simond]

Well thanks for the advice just need a little more help,if the engine eml light isnt coming on is it worth do the fault code checking ?
As if the lights on there are no faults stored ?

Also a quick report back cars starts perfect toof it for a run seems to drive as it did before it broke down all I have done is fit a new maf sensor.
But still has misfire if you rev stationary about 2-2.5 k rpm. dosnt seem to be present when driven will try to get something to tow to see if it pulls ok now. Is it worth replacing the fuel filter ?

just to elemintae it ? or am i wasting my money /

thanks

Simon:nenau

 

[Simond]

Forgot this bit .

Also I read a post by Badger about a banjo bolt in the fuel pump, at the rear of the pump that allows to much fuel to be returned to the tank,if the spring has gone weak inside, if my understanding is correct,then you get low fuel pressure in the pump and if you demand fuel quick,or at higher rpm IE a blip of the throttle it cant deliver enough,about 2000rpm misses.

I have also just revved it up slowly stationary and it misses spluteers above 2000rpm with a puff of smoke each time you feel it miss it seems to be throughout the rev range about 2000rpm on tickover and below it runs spot on and the emission from the exhaust is clean as a whistle. As I say dont really notice the misfire when driving !

Does anyone know if this fuel pump thing is applicable to the pump fitted on my car and is worth a try ?

Getting deperate now going on holiday in a few weeks and need to tow my caravan.

Thanks

Simon:thumb2

Thanks

 

[clivvy]

did you read the codes (any MIL light on at all?)

 

[rayf3262]

If it is a plastic pipe, you may be able to temporarily restrict the return fuel flow to the tank by partially closing the pipe with a clamp/molegrips or similar. Then see if the ~2000 rpm glitch is still there...

 

[spudd]

similar symptons to mine just before a new diesel pump was needed.are you getting an eml light when you turn key but dont start as with all warning lights come on at first. turned out mine was on but blanked out.if your pump is bosch i have a new pump pressure relief valve if you want to try it.

 

[Simond]

Hi Guys,

fualt seems to be changing still missing when throttle blipped,

If reved steady on tickover from idle up to 3-4 k rpm dosnt miss, blip it it does, no misfire noticable on driving. when ignition turned on eml light comes on, as soon as started goes out. So didnt read fault codes

My mate a has a maverick his runs perfect i am going to swop his maf sensor over just to illiminate the aftermarket one that i have fitted and will try restricting the the return hose and see if its any better, took the car up the motorway seems to go ok up went up to 80mph no problems.

will report back,if no better would like to take you up on the offer spud of the releif valve will it be the right type for my pump how do I identify the pump is it a new one or used ?
how much do you want for it
thanks

Simon

 

[spudd]

Hi Guys,

fualt seems to be changing still missing when throttle blipped,

If reved steady on tickover from idle up to 3-4 k rpm dosnt miss, blip it it does, no misfire noticable on driving. when ignition turned on eml light comes on, as soon as started goes out. So didnt read fault codes

My mate a has a maverick his runs perfect i am going to swop his maf sensor over just to illiminate the aftermarket one that i have fitted and will try restricting the the return hose and see if its any better, took the car up the motorway seems to go ok up went up to 80mph no problems.

will report back,if no better would like to take you up on the offer spud of the releif valve will it be the right type for my pump how do I identify the pump is it a new one or used ?
how much do you want for it
thanks

Simon

Hi
valve is new bought it tried it discovered i needed a complete pump.if your maf sensor is bosch your pump is. but i believe valve fits bosch or zexel pump.just cover postage.

 

[Simond]

Hi Spud,

Thanks for your kind offer most generous of you.
Let me know how much you require and easiest way to send you the money.
and where to. I am not great on forums will try to send you a Pm with my address details on.
At least if I fit it it will eliminate that.

Thanks

Simon

 

[Smegg]

running problem

hi, simon if it does look like you have to replace the fuel pipes do the feed and return from tank to engine bay its not hard or expensive and worth it, old pipe will have tiny holes that may not leak fuel but will suck air in i may well have to do my tdi as previos owner only did over w/arch good luck mate

 

[Fez_uk]

just do from tank to half way down chassis. Worked for me.

See my download I made in the relevant section.

 

[Simond]

Hi Spudd anychance of trying that valve sent you a Pm but maybe you didnt get it or are on holiday.

Thanks

Also quick update car starts 1st time no fault light, pulls and drives what i beleive to normal misfire detectible when driving and revving engine up through the gearchanges. So only fault I have now is when car stationary,and you blip the throttle quickly up to 3k rpm not that you would normally, the misfire is there between 2 and 3k, if you build up the revs steadily when sationary it dosnt miss ! Maybe I should leave it alone and leave it as it is is dosnt seem to be causing any issues.

What do you think maybe it had this fault before but I just didnt know as I dont normally sit there and blip the throttle.

Cheers Simon

 

[Simond]

One other thing where is the best place to get new lockstops from is Nissan only part ?

Thanks again

Simon:bow

 

[spudd]

sorry just back from me hols. in post first thing tomorrow.

 

[chatterbox]

just a thought, is it a fly by wire throttle pedal, if is then sometimes they do wear and can cause glitches like that, just a thought anyway