wtriton097 wrote:Hi all...
I recently had a full rebuild done on my 2011 mn. Everything new except fuel pump and injectors ( both out of a 2012 mn with 30 thou kms on it.. ) My issue is now i have a surging problem which wasnt evident prior to rebuild ( injectors and pump were used on old motor before diaster struck) which i relly dont know if they were playing up with the old motor.
Ive read all the thread regarding scv replacements and lubing etc but am wondrring if rpms spiked when surging occured... i dont lose power or drive and happens usually went engine hits temp. Its odd however as its usually about 40-60kms or 80-110kms. Rarely in between and inconsistent.. my mechanic mate threw the OBD over it and the code of P0638 was pending... we threw another TAC on and same result.. surging... should the replacement be "relearned"? i also replaced the scv and same result. MAP & MAF connectors cleaned.. new air filter.. have done 3 fuel filters ( as i had used Cost Effective in old motor) drained fuel tank and started totally new. Im at a loss.. i have no engine light indicated either and no further codes..
Any suggestions?
leonbee wrote:wtriton097 wrote:Hi all...
I recently had a full rebuild done on my 2011 mn. Everything new except fuel pump and injectors ( both out of a 2012 mn with 30 thou kms on it.. ) My issue is now i have a surging problem which wasnt evident prior to rebuild ( injectors and pump were used on old motor before diaster struck) which i relly dont know if they were playing up with the old motor.
Ive read all the thread regarding scv replacements and lubing etc but am wondrring if rpms spiked when surging occured... i dont lose power or drive and happens usually went engine hits temp. Its odd however as its usually about 40-60kms or 80-110kms. Rarely in between and inconsistent.. my mechanic mate threw the OBD over it and the code of P0638 was pending... we threw another TAC on and same result.. surging... should the replacement be "relearned"? i also replaced the scv and same result. MAP & MAF connectors cleaned.. new air filter.. have done 3 fuel filters ( as i had used Cost Effective in old motor) drained fuel tank and started totally new. Im at a loss.. i have no engine light indicated either and no further codes..
Any suggestions?
Whats the story with the EGR is it blanked, blocked, Broken, stuck open or something.............
taxman74 wrote:I replaced my SCV and it still surged I didn't know it had to be relearnt, Anyway my issues got worse but all sorted now. Relearn only cost $50 so you might as well get it done.
triton097 wrote:taxman74 wrote:I replaced my SCV and it still surged I didn't know it had to be relearnt, Anyway my issues got worse but all sorted now. Relearn only cost $50 so you might as well get it done.
Gday Taxman
Yeah i replaced scv also.. to no avail. Had the relearn done also as there was a bit of new gear installed at rebuild.. issue still remains.. had a crank sensor code show, reset and no more... most recently (yesterday) coded up throttle control valve.. debating now about replacement or MAP... what other issues did you have mate?
taxman74 wrote:triton097 wrote:taxman74 wrote:I replaced my SCV and it still surged I didn't know it had to be relearnt, Anyway my issues got worse but all sorted now. Relearn only cost $50 so you might as well get it done.
Gday Taxman
Yeah i replaced scv also.. to no avail. Had the relearn done also as there was a bit of new gear installed at rebuild.. issue still remains.. had a crank sensor code show, reset and no more... most recently (yesterday) coded up throttle control valve.. debating now about replacement or MAP... what other issues did you have mate?
After replacing the SCV i replaced the Fuel Filter then cleaned the MAP and MAF sensor as well as that sensor on the throttle body (Cant remember its name) Then the car started to misfire in the mornings all from injector 3 engine light stayed on, code came up P0203 - the problem was not the injector but the injector plug connector so they got cleaned and had some WD40 sprayed on them - error went after that. I really still don't know if my surge issue has stopped as I have not gone up hills or gunned it past 100km. But had the fuel pump relearned +SCV+ some other thing cant remember atm.
Other then surging and then the misfiring I had no other problems.
RHKTriton wrote:If you're getting random errors from all over the shop, I'd be looking at where all these sensors come to a common point in the wiring loom. Probably a dodgy plug somewhere.
destorman wrote:Hey crew,
Haven't been on here much due to a few family issues, but just did a post update on the Tyres thread and while on here thought I'd do a quick update on this issue too
So, a FWIW FYI update ... after many, many phone calls and trips back to the dealer, arguments with MMA, and eventually our 2015 MN puffing black smoke as it surged like and old steam train, I shot video of is doing it an suddenly about 10,000km ago and 3 1/2 years of owing it, we got some serious action.
I think it was the threat of the video going on social media and to the today tonight / ACA type shows that finally got the action. Having said that, I do believe the dealer service manager (who I had a lot of one on one contact with) was truthful in that they, the dealer needed MMA and MM (japan) to do something about it as it was software related.
So, in the end, yes, it was software related. They loaded whatever Japan sent over and it sorted out the whole mess. No more surge under cruise control, no more surge going up n down hills. There is an even so slight faint hiccup as I call it still, but after wasting so much time going back to the dealer and getting so angry and worked up, etc. it's just not worth fighting of the last little, faint stumble it only gets on a few roads.
In the process, they had to do a full system clean, manifold and turbo lines etc ... they were full of the carbon build up soot (I have seen photos as the service tech took them for me as he was a genuine caring guy).
Hope this helps others find the solution.
NOTE - fuel economy has improved too, by a about 1l/100km (so back to getting mid 8's rather than mid to high 9's) and the engine is a lot smoother and a lot more quiet.
RHKTriton wrote:If it's happened as a result of service work, you'd have to consider what components are disturbed.
Bad connection at the MAF sensor plug would be possible. Unplug, give the pins a slight twist and reinsert.
Check that the plugs on SCV & MAP are seated properly.
Only other suspects are the hoses on fuel filter may not be clamped properly.
RHKTriton wrote:Hopefully you'll be right soon.
Just observing what goes on in dealer workshops over the years (when you could still go in there) nearly always left me shaking my head and deciding it was time to take over servicing.
Diesel systems are high precision gear that really should only be pulled apart in the cleanest environments.
Let them replace the SCV at their cost ( virtually admitted that they stuffed up).
Do the 2stroke regime. Since keeping up with regular dosing, I have found that the current SCV has provided the longest run without issues.
If you are stuck with dealer service, I would suggest you make sure the engine bay is spotless before dropping off your vehicle. Most likely they won't.
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