Jump to content
SAU Community

Recommended Posts

all he did was changed oil, oil filter and few minor things that dont contribute to motor, when you put your foot into it, it has power until about 3,000rpm then starts losing boost but picks up again and then cuts out again, its constant throughout the rev range

all he did was changed oil, oil filter and few minor things that dont contribute to motor, when you put your foot into it, it has power until about 3,000rpm then starts losing boost but picks up again and then cuts out again, its constant throughout the rev range

Could be any number of things from bad fuel, to coil packs to air flow meter to vacuum leak... Very hard to say based on the information you've provided. E-Mechanic isn't an easy occupation.

Did the mechanic do your fuel filter? Does the car seem like it's running rich at all, any black smoke coming out the exhaust when these surges occur? Does it idle nicely?

idles fine and only run 98oct fuel, no smoke at all and i cant remember if he did fuel filter, its the mrs car and the receipt is in her car. it doesnt seem to run rich whatsoever, what oil is best to run in the neo's?

Get that receipt, list everything done. Then we might actually be able to help.

RB oil filter changes are notorious for being a complete pain in the ass, a careless mechanic can easily damage a vacuum hose causing the motor to overboost and hit R&R.

ok heres what was done

-change oil and oil filter

-check brakes

-top up fluids

-check lights steering tyres suspension etc

-inspect underbody, hoses, belts etc

the oil that was put in is 10w-40 semi synthetic mobil formula

ok heres what was done

-change oil and oil filter

-check brakes

-top up fluids

-check lights steering tyres suspension etc

-inspect underbody, hoses, belts etc

the oil that was put in is 10w-40 semi synthetic mobil formula

This sounds like your issue. I bet he has played around with some hoses and not noticed has has pulled one off or he has replaced one and not put a clamp back on, etc etc. I would just go over all your hoses, and I mean all of them. Unfortunately it's not a fun job on a Neo confused.gif

As for oil, I personally always use full synthetic as well but it's not realllllly critical. Semi-synthetic will do the job.

This sounds like your issue. I bet he has played around with some hoses and not noticed has has pulled one off or he has replaced one and not put a clamp back on, etc etc. I would just go over all your hoses, and I mean all of them. Unfortunately it's not a fun job on a Neo confused.gif

As for oil, I personally always use full synthetic as well but it's not realllllly critical. Semi-synthetic will do the job.

ok will check it all out tomorrow thanks alot guys :)

  • 3 months later...

Did you find out what the issue was? I have a similar problem except mine surges between 4000 & 5000 RPM & then pulls fine from there to redline. It only happens when my foot is flat not at part throttle.

Did you find out what the issue was? I have a similar problem except mine surges between 4000 & 5000 RPM & then pulls fine from there to redline. It only happens when my foot is flat not at part throttle.

That sounds like RnR to me. Cold weather, possibly running a touch more boost and maxxing out your AFM.

I thought it might be R&R. It doesn't have a boost controller on it so should be running stock boost although the boost gauge shows about 0.7 bar.

I reset the ECU & also changed the BOV so it was re-circulating again & it seemed to almost fix the problem, now its just a slight hesitation at 4500rpm only sometimes, other times its fine.

The re-circulating pipe isn't 100% sealed so I will seal it all up & see if that fixes it.

unless the mechanic is a complete berk then he shouldnt of knocked any vacuum hoses off when changing the oil (at least)engine bay is large and oil filter easy to get to when compared to a 32 anyway

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • I feel I should re-iterate. The above picture is the only option available in the software and the blurb from HP Tuners I quoted earlier is the only way to add data to it and that's the description they offer as to how to figure it out. The only fields available is the blank box after (Input/ ) and the box right before = Output. Those are the only numbers that can be entered.
    • No, your formula is arse backwards. Mine is totally different to yours, and is the one I said was bang on at 50 and 150. I'll put your data into Excel (actually it already is, chart it and fit a linear fit to it, aiming to make it evenly wrong across the whole span. But not now. Other things to do first.
    • God damnit. The only option I actually have in the software is the one that is screenshotted. I am glad that I at least got it right... for those two points. Would it actually change anything if I chose/used 80C and 120C as the two points instead? My brain wants to imagine the formula put into HPtuners would be the same equation, otherwise none of this makes sense to me, unless: 1) The formula you put into VCM Scanner/HPTuners is always linear 2) The two points/input pairs are only arbitrary to choose (as the documentation implies) IF the actual scaling of the sensor is linear. then 3) If the scaling is not linear, the two points you choose matter a great deal, because the formula will draw a line between those two points only.
    • Nah, that is hella wrong. If I do a simple linear between 150°C (0.407v) and 50°C (2.98v) I get the formula Temperature = -38.8651*voltage + 165.8181 It is perfectly correct at 50 and 150, but it is as much as 20° out in the region of 110°C, because the actual data is significantly non-linear there. It is no more than 4° out down at the lowest temperatures, but is is seriously shit almost everywhere. I cannot believe that the instruction is to do a 2 point linear fit. I would say the method I used previously would have to be better.
×
×
  • Create New...