Please help I've tried just about everything. When my car is ideling my car does a hiccup and the idle wouldd drop to 400rpm for a second than back to normal and than it does it again. It's like it has the hiccups. Here are the things I've tried to remedy the problem:
fuel filter, new knock sensor, new maf, clean iavc, new plugs, tested all the coil pack, clean the throttle body.

unfortunately it's still doing it and I'm out of ideas. any suggestion would greatly be appreciated.

 

I had this very same problem and it was because my spark plugs were not gapped correctly make sure that they are gapped at 44. A lot of people buy the plugs and just stick it in that is not the proper way to do it.

 

they're pre gapped ngk iridium. anthing else

 

Compression test and vacuum reading @ idle would be the next steps. Also, if you have access to an obdII scanner the fuel trims and coolant temp would be helpful as well.

 

I have those same plugs and they are NOT pre gapped get one of those cheap 88 cent gappers and check it.

 

Also when u gap them to 44 do it with a needle nose pliers because the gapper will break the little ngk tip. aslo it says it comes pre gapped but just pull one and see its at 39-40 and thats a big difference.

 

thanks guys i'll give it a shot

 

Bosch Platinum Plus 4's ... FTW!!!!

 

had the same problem but i tried gapping the plugs like vq builder said and it worked like a beaut.

 

try changing ur pcv valve if u havent changed it yet

 

take break cleane spray it on the intake manifold area, just to see if u got an intake leak... if the car starts reving as ur spraying that find where exactly that can be the reason....

 

I had the very same problem a month ago. I tried numerous things...i think the culprit was bad gas.

 

i wonder if he got it fixed...

 

thanks guys especially vqbuild6. it fixed the problem and now she's prrrring

 

what did you do that fidex it? The gapping?

 

make sure the plugs are gapped correctly

 

yup it was the gapping. last time i listen to the guy at the parts store.

 

Iac Valve????

 

good for you

 

yea i had the same problem on my 93 SE and cleaning the throttle body did the trick. honestly i can say i never measured my plugs. i just assumed that they were pre measured and i never had a problem. guess i just got lucky. immona go waste 99 cents this weekend for a gapper.

 

Wait a sec...you said you changed the plugs & the problem remained. Then you re-gapped the Iridiums & it fixed the problem. So what caused it originally? Your old plugs were worn? I'm a little puzzled that incorrect plug gapscan cause such an issue.

 

Why would you puzzled if the gapping is off its not going to run right. Some maximas are different then others so you probably wont see it in some. But my 95 does it sometimes if the gapping is wrong. I use to wonder why too but thats the way i got it fixed. Gapped it to 44. But then my 96 had the same problem but this time it was because throttle body was dirty... which is why i ripped of my egr. It just all depends on what your problem is.

 

my old plugs were bosche platinum which are crap. i changed them to iridium but the problem persisted until i gapped them.

 

where do I get a gapper?? autozone? and is it in sizes or are they all 44?
^^^ forgive for the stupid question!^^^
I have Bosch Platinums in right now, I will definitely be changing them to the OEM kind next time. I'm so glad I joined this forum!

 

Yea just go to advanced auto parts and ask them for a spark plug gapper... its 80 somthing cents i think. Its nothing complicated about gaping your plugs. Make sure that the gap is 44 on on the gapper doesn't matter what plug it is going to be 44. If your still lost use google or ask the guy at the parts store.