My R33 Likes To Chuga Chug Chug

[slusarczykr33]

So looked around about this and it's very hard to find someone with exactly the same problem so here it goes for my problem and hopefully will give reference to others in the future.

Will try get a video ASAP

So car is fine and dandy as I'm driving along, on hot days but don't know if it's the weather that has anything to do with it as I work nights at the moment and have no chance of driving her when it's cool. All of a sudden I driving along and te car will drop maybe 200 rpm and it will feel rumbly as it idles. Now when I accelerate it feels as if te car is choking on something , I hit 4000 revs and it starts to go away but tends to missfire a bit , at this point. Get home turn her off, drive later it's fine untill later on while driving again . Note sometimes it had gone away while driving. So I've changed spark plus and cleaned the throttle body as I thought maybe its got gunk in there, spark plugs were a bit flooded so those were changed to new ones which the girl at repco stuffed up and have me platinums instead of copper.

So what's my next step to check, I checked the coilpacks and they seemed to be clean.

Your time and effort in assisting me will be greaty appreciated

And the car of course

1996 r33 gtr series 2

Stock engine

Straight through exhaust

[slusarczykr33]

And I meant te plugs were a win , she gave me platinums for copper price , wasn't clear there

[scotty nm35]

Try re-soldering the AFM, there is a 'how to' on here somewhere. Or get another known good unit to try. Most times an intermittent fault like this one is due to dry solder joints inside the AFM.

[slusarczykr33]

alright well cars getting tuned real soon, with new afm's regardless so hopefully does the trick..

[jjman]

best to trouble shoot and solve yourself before getting to the tune/dyno as if it isnt they will be charging you top dollar to trouble shoot your car, as well as to fix the problem that you could have easily done so from home...

[scotty nm35]

Agreed, it could be $150 an hour to diagnose an issue on the dyno, sort it out first if possible.

[slusarczykr33]

Okay well then I'm changing mechanics, as mine said the tune should fix if but failed to tell me what it was as he didn't know what it was. Ill give another place a go, try run the car and bring it to them with the problem, if they can't tell by a quick drive ill ask to book a dyno run and have it faulting before I jump on

[XGTRX]

Try re-soldering the AFM, there is a 'how to' on here somewhere. Or get another known good unit to try. Most times an intermittent fault like this one is due to dry solder joints inside the AFM.

+1

Don't waste your time doing anything else before doing this. Speaking from experience.