need help!! i dont know what wrong with my rpms!

So ive been on miata fourm and no one there seems to know what might be wrong with my car.
The probem is i cant get passed 4k rpms in any gear but 5th,ive tried before taking off on 1st and flooring it to see if i could get past 4k but it wont i have to shift.Its like im redlining right between 3k and 4k rpms...it feels like there is rev limiter there or something
i cant seem to figure out what it is ive read it could be it a spart plug issue.(can any one tell me how spark plugs can effect the rpms from rising higher)
or crank issue
or maybe clutch
could someone maybe meet up so they can see first hand and maybe get an idea of what it is

Have you checked the timing??

More stuff -> http://www.miata.net/garage/ignition.html

You just made zero sense right there.

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Originally Posted by trickyrix

You just made zero sense right there.

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I thought I did a fine job! ::euro::

Could be a lot of things. If you are not knowledgeable enough to trouble shoot, you might want to bring it to a skilled Miata mechanic. Track Dog Racing in Dallas or Miata Solutions North of Alliance Airport in Fort Worth depending on what is more convenient.

My thoughts are it could be bad plug wires, bad plugs, clogged cat, timing is off, CAS is bad, timing belt slipped, clogged fuel filter, clogged fuel injectors, fuel pump going out, etc...

Without seeing the car and checking it out this is hard to trouble shoot.

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Originally Posted by trickyrix

You just made zero sense right there.

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I guess I'm getting good at deciphering illegible posts since JeffMan has been around. ;)

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Originally Posted by POS Racing

I thought I did a fine job! ::euro::

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Wasn't talking to you... ;)

Where are you located?

thanks this helps alot
im located in the grapevine/euless area

Well there are a few variables the first replacing spark plugs then checking for spark then coils then replace plugs then check for continuity and resistance in the air meter then check the spark output on the coil for a late 95 on or the CAS for early cars and possibly the computer after that there are multimeter diagnostic details on Miata.net but I'm going to bet money that you have a severed wire or plug and wire issue

Is it a hard cut at 4k and does it also happen while the car is in neutral?

Have you washed your engine lately?

its not really a hard cut. its like the engine can push no more,like if i try to make it go past that 4krpms i could blow the engine.
its like the same as if you reached your redline and kept pushing past 8krpms
the car is fine in idle,has no problems there and it picks up speed well but i know for sure its not reaching its full potential in rpms..ya know??
im going to do the sparks first and see if that was the problem.

and no,i have not washed the engine bay or and have not got the throttle cable wet


do you guys know if there is a meet at kellers this week for sure??
i could drive there and maybe someone can see what i mean?

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Originally Posted by black roadster

I guess I'm getting good at deciphering illegible posts since JeffMan has been around. ;)

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I would have had it figured out in a few minutes and not needed to post on line for someone to try and sell me shop time.

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Originally Posted by jeff_man

I would have had it figured out in a few minutes and not needed to post on line for someone to try and sell me shop time.

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OK, aliens who took Jeff_man's body... we're on to you, see... You can't be grammatically correct and spell words at the same time or we'll know!

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Originally Posted by jre9162

its not really a hard cut. its like the engine can push no more,like if i try to make it go past that 4krpms i could blow the engine.
its like the same as if you reached your redline and kept pushing past 8krpms
the car is fine in idle,has no problems there and it picks up speed well but i know for sure its not reaching its full potential in rpms..ya know??
im going to do the sparks first and see if that was the problem.

and no,i have not washed the engine bay or and have not got the throttle cable wet


do you guys know if there is a meet at kellers this week for sure??
i could drive there and maybe someone can see what i mean?

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What's wrong with your "shift" key?

The same thing that is wrong with his spelling and grammar. Did I read you correctly when you said any gear BUT 5th? does that mean your engine revs past 4000 in 5th?

I had the same thing happen to me. The timing belt jumped a tooth or two. I replaced it (and the obligatory idlers, water pump, and oil seals) and all is well. It is not too hard. Just takes time.

thanks man
im going to start with new spark plugs and and ill then move to the timing belt if problem continues

Put plug wires on your shopping list too.

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Originally Posted by tailchaser

OK, aliens who took Jeff_man's body... we're on to you, see... You can't be grammatically correct and spell words at the same time or we'll know!

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mhm It happens sometimes

Changed the spark plugs and fuel filter. Miata is running like a champ once again :)