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  1. Guides: Engine
    As title says, I need someone proficient with the ME442 software and if possible to look at some data logs. NB turbo Miata, starts and idles perfectly fine, but when given some gas, it instantly dies. I want to see if altering the AFR map will help it, but any advice from you guys?
  2. Problems
    Hi, been fighting with an issue on my 1.6 1991 NA where the car will start pretty much first time every time, it will then idle pretty lumpy. The issue though is that any time you apply the throttle it will just bog down and stall. If you raise the revs slowly you can get it to higher RPM where...
  3. Problems
    Hi All, This is my first post about my 2006 NC so i will include as much information as i can. The problem started a few months back where the engine revs were bouncing after de-clutching when the engine was cold. It was most noticeable when I was heading towards say a roundabout in second or...
  4. Problems
    UPDATE: SOLVED! Ongoing issues with my rebuilt 1.8 VVT Once its warm this issue tends (not always) to go away but occassionally it will drop rpms like this (video) and stall but will start straight back up again. Password: mx5 I am not sure if it is a vacuum leak? is the carb cleaner...
  5. Problems
    So my Turbo build in progress is has been a roller coaster of problems and issues and this is the latest that I have come across. It's being done at a well respected garage among the MX5 scene (in the interest of fairness I won't disclose their name), however currently have us both confused on...
  6. MX-5 / Roadster Forum
    Hi all I took Maggy (my beloved '94 MX-5 Mk1 1.6 BBR Turbo) in for her MOT a few weeks back and there were a few mechanical issues (now sorted) but they couldn't test the emissions as they couldn't hold the revs at the right level. I'd noticed she wasn't running right and would often rev very...
  7. Problems
    Hi guys, A little while ago ive been having problems with fluctuating idle revs but only when there is a lot of electrical draw on the car eg: lights on, heater on full blast at the same time. I have cleaned the throttle body (wipe clean with soft cloth, didn't scrub to protect factory...
  8. MX-5 / Roadster Forum
    Hi Together, first I would like to introduce myself, since this is my first post. My name is Jannis , I am 28 years old and I am working as an engineer in Switzerland. Since two weeks I am a proud owner of a 1999 Anniversary MX-5 NB J. However I have a problem and I am getting desperate...
  9. Forced Induction & N/A Power Mods
    Evening all, Something that's been bugging me for a while - my idle VE cells are much lower than the adjacent non-idle cells. This doesn't make much sense - the timing is the same, the target AFR is the same (not tuned idle with VEAL) the KPA is roughly the same - the fuel should be similar...
  10. Problems
    Hi I'm looking for some assistance diagnosing a fault with my 1999 MX-5 1.8S which has 79k on the clock, thank you all in advance. Symptoms are as follows: Rough idle (1500*rpm cold, 700-800rpm warm) Splutters up to avoid stalling every few seconds, Spluttering and hesitation on initial...
  11. Problems
    Mx5 guru, my 1992 mx5 is getting seriously poor mpg. Used to average 250 miles a tank even with spirited driving. nowadays its more like 120 miles. My car backfires really loudly on overrun if i tap the throttle to the point that you can hear it echo through the woods. Another note, my idle...
  12. Problems
    Hello guys, as per title I'm trying to sort out an idle problem and I got to the point where I need to reset the idle. I have already sort of messed it up a few times (didn't know the car had to be warm but not hot). Once I bridge 10 and GND I need to lower the idle by turning the throttle body...
  13. Problems
    When i start the car cold its idling at between 1200rpm and 1500prm as it should on choke. When warm it usually sits at around 800rpm but every now and then when warm it drops to about 300 and feels like it is going to cut out. there seems to be no pattern as to when or why it is doing this but...
  14. Problems
    Hi all, Mrs Deviators Mk2 is idling rough. It's a 99 UK spec 1.8. So far I've done the obvious, plugs/leads/coil pack, but when you pull up at a junction the revs fluctuate and it feels like it's about to stall. It never does. I'm thinking the next things to check/research are... 1. reset...
  15. MX-5 / Roadster Forum
    Hi there all, As some of you know I have a 1.8 black eunos roadster. I discovered that my driver's seat was badly worn and damaged, so I purchased another seat of seats unknowingly they happned to be from a UK MK1! I'm now unsure if these will fit in the eunos with the seat belt mountings and...
  16. How do I...
    Going to keep it short. Basically the car starts fine and warms up fine. When it gets to normal operating temp I have slight problem with it idling. So say the engine I reve the engine to say 5000 reves or anything over 2000 the rev counter comes back down but stops at 1500 reves hold its self...
  17. Problems
    Hi, new to the forum so a quick intro. I recently bought an NC 2.0 Sport, 2005-55 with 23k miles in Galaxy Grey. I am loving it so far, after a string of hatchbacks it is a great step up. However... since I bought the car, I have noticed a little niggle once the car is up to temperature - the...
  18. MX-5 / Roadster Forum
    Hi there, Im new to the forum, my 1993 Eunos roadster is a black 1.8 NA, after a run the car warms up to temp ok however. When pulling up to a junction you can find the engine reving high at 1500 rpm, this only last for around 20 seconds then the engine dies back down to, around 850-900 or in...
  19. Problems
    hi, i have just joined so if this is in the wrong place or something, sorry. i've joined up because i need some help with a car problem. the other week i started my car and the engine light came on and it was idling really bad. revs would drop very low then it would jump up to about 1500rpm...
  20. Problems
    Hi all, Any advice appreciated here. Maybe they're all like this, but when I come off the accelerator, the revs don't fall smoothly back to Idle in a single motion - instead they hang momentarily at about 1,200rpm, and sometimes at a stage higher than that. Main question is: is it supposed to...
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