Have you checked your timing belt for slipping?

 

Unfortunately not yet. Dont have any tools, space or know how to do it actually. I need my trusted mechanic to have the free slot for me to drop it off for a full run down.

BTW, how would a timing belt that is toothed be able to slip? Also, the AFR issue does go back into a neutral state if left to idle for a few seconds after it has dipped.

 

The timing belt can slips at high revs if the belt tensioner is not working properly - it happens quite often. However, the things you are describing seem more like a faulty idle step motor issues. But you have said that you replaced it with a new one... I'm getting confused now... You are running stock camshafts, right?

 

Yup, stock cams, as you was mentioning about the belt slipping on high revs, i have not seen any abnormal situations on high revs actually, this is only happening during idle or when coming to a stop regardless of speed.

Going to be pulling the injectors later in the week and cleaning them, and replacing the o-ring seals as well as taking the whole inlet manifold off for a complete clean.

 

And you are absolutely sure that you have no holes in the intake and no cracks in the exhaust? The most easy way for you to solve the issue is to find someone close to you with tatrix cable and log the engine performance at that moment. Otherwise we can be guessing for a long time...

 

Did you check your MAF?

 

For sure no cracks, and holes.

Unfortunately over here in HK, not many ppl are too clued up on hooking up and logging, as far as help I would get, would be a shop telling me to ditch the Ralliart ECU and going for a full on HKS Fcon Vpro or Motec etc, TBH, at this point not in the position to do so.

Yes, was changed for a brand new unit as mentioned in earlier posts.

 

Quick update,

So the car went into the workshop again, and had the injectors pulled out, flow tested, cleaned o-rings replaced, inlet manifold taken off, cleaned, MAP sensor cleaned, TPS cleaned, and the problem is still present.

So what has been checked and ticked off the list is as follows:

Coils (brand new mitsubishi part)
Plugs
IACV (brand new mitsubishi part)
MAF (brand new mitsubishi part)
o2 (brand new mitsubishi part)
TPS - tested, no fault found
MAP sensor - tested, no fault found
Injectors - flow tested and cleaned
Injector o-rings - replaced
Fuel pump - replaced with AEM 320LPH
Fuel pump wiring - re-done
Compression - tested, no fault found
Timing belt - checked, not slipping, nor is it in bad condition
Timing - checked, all in check
Throttle body - cleaned out
Throttle body seals - no leaks
BOV - internal diaphragm was split before, new BOV replaced

Theres absolutely no vacuum/boost leak, theres no holes in the exhaust.

What next?

 

Did you ever solve this issue?

 

same problem here, any solution to this problem?

 

these forums are horrible for answers lol. It's never finished. Or pictures links are broken which makes the diy section useless.

 

Horrible forum. Why is there still no response to solve the problem?

 

lol, bumps a super old thread and states "WhY iS tHeRe No ReSpOnSe, YoU aLl SuCk!"

 

How so did you even look at the dates on the post.. ? Even if its old who gives a ****.

 

This is an enthusiast forum, you're not entitled to help. Any attempt at helping a fellow member solve a problem is a pure act of generosity. If you aren't getting the help you need, go pay someone who knows what they are doing to fix your problem. A great number of new threads are from people coming to the forums seeking help with their problems. Sometimes they get the help they need, sometimes they don't. Diagnosing a problem over the internet without access to the car and usually with very limited information is difficult to say the least. There are professionals who do this for a living, and they aren't here doing it for free. Most of the time in life you get what you pay for.