different car giving me bags of trouble

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darbuck
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different car giving me bags of trouble

Post by darbuck »

Hi Guys I havent been on for a while I have been super busy doing an honours degree in energy engineering anyway the C5 died so I bought a nissan maxima 01 ran ok but was a bit iffy cut out the odd time but now I sorted that the car wont hold idle between 1500 and 3500 any suggestions as to what could be causing this. :hb: :help2:

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GiveMeABreak
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Re: different car giving me bags of trouble

Post by GiveMeABreak »

Moved from the Citroen Technical Forum - Sorry to hear about your C5 - you may get some general advice concerning your Nissan, but we don't really do other makes here. :wink:

Gibbo2286
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Re: different car giving me bags of trouble

Post by Gibbo2286 »

Look up 'How to clean the IACV' that's the most common reason for your fault.

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darbuck
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Re: different car giving me bags of trouble

Post by darbuck »

Hi Marc, I know, I just think the expertise on this forum can help me. respect to all here.
Darren

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darbuck
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Re: different car giving me bags of trouble

Post by darbuck »

Hi Gibbo, how are you I tried cleaning IACV I ave actually replaced it and still the same problem I am going to pull the well hidden ecu to to see if the driver is blown but I checked it before and it was fine. I have also replaced TPS and Knock sensor. 8-[

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myglaren
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Re: different car giving me bags of trouble

Post by myglaren »

GiveMeABreak wrote:
19 Jun 2017, 10:55
Moved from the Citroen Technical Forum - Sorry to hear about your C5 - you may get some general advice concerning your Nissan, but we don't really do other makes here. :wink:


But it is French-ish surely!

Can't assist with the problem though, sorry.
I imagine a diagnostic session would be the first thing to try, might narrow down the possibilities.

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darbuck
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Re: different car giving me bags of trouble

Post by darbuck »

Hi myglaren I tried running a diagnostic, no faults coming up so maybe a vaccuum leak, or faulty new TPS. she just isnt as talkative as a C5. I will keep trying, I think I will try to build a smoke machine and try to find a leak, if there is one. I am going to have to try to work blind on this one. Thanks guys if I make any progress I will let you know.

wurlycorner
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Re: different car giving me bags of trouble

Post by wurlycorner »

Idle between 1500 & 3500?
The engine shouldn't be idling that high anyway???

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darbuck
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Re: different car giving me bags of trouble

Post by darbuck »

Hi Wurly, I know it sounds mental but its for the emmissions test it just keeps hunting up and down so they cant complete the test which means I cant get an NCT the same thing as an MOT just with a bit more beurocracy and non mechanic testers that can only follow the computer readout.But that aside she wont run steady and tends to hesitate and surge so not exactly safe to drive so I have it off the road at present. pain in te rear end. I have a loan of a pug 205 wich is a good little motor but uncomfortable for a 140 mile round trip to work.

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Re: different car giving me bags of trouble

Post by wurlycorner »

Ah right, gotcha...
Have they not got a generic OBD diagnostic tester that can tell them what is going on?

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darbuck
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Re: different car giving me bags of trouble

Post by darbuck »

Hi Wurly, yeah I have a delphi and wurth wow knock off which gives a good bit of info there is only one code for a knock sensor but that shouldnt cause this kind of issue should it ? unless it is preventing idle relearn but It was doing tis long before the knock sensor became an issue obviously it could have been failing but I think tere is another issue I ave attached some readings if someone can tell me if they look mental to them too. any ideas this is going on months now the car is off the road since march.
Attachments
fuel trims at idle 850rpm.PNG

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darbuck
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Re: different car giving me bags of trouble

Post by darbuck »

Hi guys update on this the bank1 sensor 2 O2 sensor is constantly reading lean does this mean it is kaput

jgra1
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Re: different car giving me bags of trouble

Post by jgra1 »

hi Dar, i had similar lean banks on someones BM last week.. said I would take a look..

the rubber pipe from MAF to inlet was perished..! i spent a bit of time before finding this.. and at the moment do not know if i have cured the lean banks.. I hope I have !

John

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darbuck
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Re: different car giving me bags of trouble

Post by darbuck »

Hi John, I actually replaced the rubber boot between the Maf and throttle body and I have replaced the vaccuum lines could it be the sensor, I done a smoke test but couldnt see anything. I am beginning to think its electronic but cant be sure.
Thanks John by the way