Maverick won't rev above idle

[Jethro]

Hello folks, I am looking to get back into a 4x4 after 10 years away from them , and near me is a Maverick TDI that won't run properly ( I'd like to buy it if I can find a fix for it 1st), I am good with the spanners but not great with electronics.

So, it will start on the key but not great when cold, and you can only rev it up about 3 times and then it will only sit and idle; nothing else. After a bit of experimentation it was discovered that if you flick the key off and on again quickly before the engine stops, you can make it rev another few times, then back to idling.

Now, the MAF is brand new, crankshaft sensor new, fuel filter new, in fact the filter head was bypassed altogether and fuel fed in from a small jar, but no difference. The injector pump was removed and sent to a specialist for checking, nothing wrong.

It's been to a main dealer but no codes show up during diagnostics; however it was discovered that 5 volts were going to somewhere that they shouldn't be ( its almost a year ago so no-one can remember exactly what this was) but dealer said that they wouldn't guarantee that a new ecu would cure the trouble.

I'm willing to invest a bit of time into it. Hopefully some of you folks can give me a bit of a hand on this one. Thanks in advance for any assistance, and I apologise if this ought to have been in the electrical forum.

 

[jims-terrano]

Check out the downloads section in "Quick Links", there is a workshop for the mini filter.
Theres been a post in last few days with same problem and it was the mini filter that was blocked.

Jim T

 

[Jethro]

i'm sure the fuel lines are clear, like I say , the whole pump was off the vehicle and sent to a diesel injection specialist.

I feel its electrical or electronic, although there are no fault codes it behaves as if something resets itself when the power is removed.

 

[tezzer]

does your vehicle have fly by wire?? could be throttle sensor, try spraying with wd40. :augie:thumbs

 

[Jethro]

Where is the sensor Tezzer? Is it near or attached to the pedal or in the engine bay?

I haven't bought this thing yet, but I will do if I can cure it easily. Been at the garage nearly a year, garage man is owed a fortune so far, owner won't pay cos it still doesn't work, garage man doesn't want to waste valuable time on it. I think its 98 or 99, its got round headlamps and chrome grille.

Then again, if it's sat a year what else will be wrong with it?

 

[Qplate]

Sounds like the ignition barrel/switch to me as i had the same thing on my TDi.

It would start no problem but when you pressed the accelerator it did not rev, also noted that the window wipers and radio would not work when this was occurring.
Try squirting WD40 into the ignition barrel and jiggling the key a few times,it solved the problem on mine for the short term but i think a new switch will be needed.

Hope this helps.:thumb2

Steve..

 

[tezzer]

Where is the sensor Tezzer? Is it near or attached to the pedal or in the engine bay?

I haven't bought this thing yet, but I will do if I can cure it easily. Been at the garage nearly a year, garage man is owed a fortune so far, owner won't pay cos it still doesn't work, garage man doesn't want to waste valuable time on it. I think its 98 or 99, its got round headlamps and chrome grille.

Then again, if it's sat a year what else will be wrong with it?

i think its on or by throttle pedal, have a look here.--

http://bebrs.pie-dabas.net/Webs/Terrano/R20/fe.pdf

and keep scrolling down.

 

[jims-terrano]

i'm sure the fuel lines are clear, like I say , the whole pump was off the vehicle and sent to a diesel injection specialist.

I feel its electrical or electronic, although there are no fault codes it behaves as if something resets itself when the power is removed.

Don't dismiss it quite so quickly, read previous threads as it was only yesterday or day before that someone replied back with an update on theirs and it turned out to be the mini filter. See this http://www.nissan4x4ownersclub.com/forum/showthread.php?t=6837

Jim T

 

[guncharmer]

i am really hoping someone can help out here.
i could be wrong but my understanding is that spraying wd40 on the throttle pedal sensor is a no no and if yours is not faulty then wd40 getting inside the potentiometer can wreck it.no harm in checking connections though. its situated above the throttle pedal in the footwell.
when you state that if you rapidly turn off then on again and it will rev a little that is probably the ecu rebooting and then again deciding its not going to rev anymore and generally that would be due to some signal its receiving.thats interesting the post about the ignition being the culprit as it sounds as though it sorted the problem i dont know if you got more details or not or tried a remedy.
for a total wild guess , according to an electrical diagram i saw,the brake pedal switch is on the same circuit as the throttle and supposedly sends a signal to the pump to cut fuel under braking so that could potentially cause a problem and is known to cause running problems on merc e class models if my memory serves well.
worth checking the engine earth strap is grounding well.
anyway,come on lads this thread is a messers and guessers paradise!

 

[danielj]

As messers and guessers paradise has been mentioned any chance of a really wild guess--would it have anything to do with the key chip. Some autos will start without the chip in the key but won't do much else. Although they usually cut out after a few revs as far as I know and won't stay running.

 

[Jethro]

Keep it up, whether the guesses are wild or not at least I am getting some food for thought. At least I found on the online manual that you can actually measure (by voltage) whether the potentiometer works or not.

 

[guncharmer]

Have you checked the tyre pressures?

sorry about that,but methinks you are going to need a good sense of humour to get it up and running right.if its cheap enough buy it anyway and if it doesnt go sell it for spares. how about somes guesses as to what its worth?

 

[Jethro]

I was thinking £400-500. This had only passed MOT 3 weeks before breaking down. Its in nice order.

I was hoping that it wasn't the only one in the world with this problem and that someone in an owner's club somewhere had solved this before me!

 

[guncharmer]

how old is it and which model? is it a bosch maf ? i only know from experience the bosch,if its this one you could check just to see if it will rev with the maf disconnected as these trucks will run without them though not great but at least run and rev and if for any reason the new one is bolloxed and stopping the motor revving disconnecting it will check this. hmmm i suppose if you manage a quick cheap fix at the garage they will want more for it. take a risk and buy it if its cheap enough and spend hours and hours trawling the internet at least it will keep you out of the pub.then give up and become an alcoholic as you make up for lost time! then have another go at trying to find the answers to terrano running problems when you are in recovery. thats what i am doing!

 

[Jethro]

I have been on t'internet for weeks already! The guy at the garage doesn't care its not his jeep, all he wants is for the owner to cough up for the work so far, which said owner seems unable to do.

Then again, I have enough things round here that need work..........

 

[lacroupade]

I have been on t'internet for weeks already! The guy at the garage doesn't care its not his jeep, all he wants is for the owner to cough up for the work so far, which said owner seems unable to do.

Then again, I have enough things round here that need work..........

Jethro see what the bloke will take for it. Then let us know..,..£500 would be a steal even if you spent a bit of cash getting it running.

But he has to go through due process before selling it, although if its been there a year it shouldn't take much.

 

[guncharmer]

you could get a secondhand ecu for circa £150 but i have a feeling it may need to be programmed in by nissan for various reasons.if it turns out not to be required then you can almost certainly sell it for roughly what you paid.

does anyone know if this is the case that a replacement ecu must be programmed to the car?

 

[danielj]

you could get a secondhand ecu for circa £150 but i have a feeling it may need to be programmed in by nissan for various reasons.if it turns out not to be required then you can almost certainly sell it for roughly what you paid.

does anyone know if this is the case that a replacement ecu must be programmed to the car?

Couple of second hand ecu's for Terrano on e-bay the the minute in and around the £ 30 to £ 40 mark if it's of any interest. No idea if they would fit the Maverick under discussion here though. Punch in E-bay item number 310168334590 into the e-bay search bar and you will see details of the seller.