# Miata won't run... **URL:** \ **Category:** NYSpeed Automotive\ **Created:** [March 5, 2008, 6:50pm UTC](https://forums.speedlife.net/t/miata-wont-run/44515 "2008-03-05T18:50:53Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Minglor](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/minglor/32/7373_2.png) [@Minglor](https://forums.speedlife.net/u/Minglor)\ **Post date:** [March 5, 2008, 6:50pm UTC](https://forums.speedlife.net/t/miata-wont-run/44515/1 "2008-03-05T18:50:53Z")
Problem as it stands. Car will start. Will not idle. If kept above 2000 rpms will rev smoothly and holds rpms with ease. If it drops below 2000 rpms the car falls flat and tries hard to stall, even when given full throttle. I have replaced and/or checked all vacuum lines. The big plastic plug on the back of the intake manifold is in place. Same with the short line to the FPR and the cap for the cruise tap. Replaced the AFM/02 sensor/PCV valve/Plugs/Wires I have also checked my intake piping which is currently an elbow off the JR intake and one piece of straight 2.5 pipe Cleared my codes. None returned. I am stumped. At this going rate I am going to pull the 1.6 for another or a 1.8 When I let off the throttle (above 2000 rpms) it make vacuum and then looses vacuum and fails as it misfires and stalls. ---
**Author:** ![Carnut](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/carnut/32/7590_2.png) [@Carnut](https://forums.speedlife.net/u/Carnut)\ **Post date:** [March 5, 2008, 7:31pm UTC](https://forums.speedlife.net/t/miata-wont-run/44515/2 "2008-03-05T19:31:57Z")
what year is the car nice signature by the way ---
**Author:** ![sickboy](https://avatars.discourse-cdn.com/v4/letter/s/7ea924/32.png) [@sickboy](https://forums.speedlife.net/u/sickboy)\ **Post date:** [March 6, 2008, 5:11am UTC](https://forums.speedlife.net/t/miata-wont-run/44515/3 "2008-03-06T05:11:58Z")
What were the codes before you cleared them? I would venture to say that changing the engine out is a little bit of overkill. I’d keep looking for vacuum leaks, maybe check the TPS. Check your fuel pressure & timing. There’s got to be a relatively simple explanation ---
**Author:** ![newman](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/newman/32/7569_2.png) [@newman](https://forums.speedlife.net/u/newman)\ **Post date:** [March 6, 2008, 5:26am UTC](https://forums.speedlife.net/t/miata-wont-run/44515/4 "2008-03-06T05:26:10Z")
did you have the engine out of this thing? is the IACV plugged in? ---
**Author:** ![yunvme666](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/yunvme666/32/5065_2.png) [@yunvme666](https://forums.speedlife.net/u/yunvme666)\ **Post date:** [March 6, 2008, 5:34am UTC](https://forums.speedlife.net/t/miata-wont-run/44515/5 "2008-03-06T05:34:24Z")
sounds like the vane air meter to me … where ya live i can take a look im pretty good with mazda’s what yr and what motor 1.6 or 1.8? ---
**Author:** ![zwarbyt](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/zwarbyt/32/7623_2.png) [@zwarbyt](https://forums.speedlife.net/u/zwarbyt)\ **Post date:** [March 6, 2008, 5:47am UTC](https://forums.speedlife.net/t/miata-wont-run/44515/6 "2008-03-06T05:47:05Z")
2 options IAC is stuck closed EGR is stuck open hit them both with a hammer, seriously ---
**Author:** ![focusinprogress](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/focusinprogress/32/7227_2.png) [@focusinprogress](https://forums.speedlife.net/u/focusinprogress)\ **Post date:** [March 6, 2008, 6:45am UTC](https://forums.speedlife.net/t/miata-wont-run/44515/7 "2008-03-06T06:45:29Z")
^ i was thinking the same thing, either EGR or IACV related. if niether of those it could be a TPS ---
**Author:** ![escgt](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/escgt/32/7512_2.png) [@escgt](https://forums.speedlife.net/u/escgt)\ **Post date:** [March 6, 2008, 7:48am UTC](https://forums.speedlife.net/t/miata-wont-run/44515/8 "2008-03-06T07:48:52Z")
do you have that tube hooked from the bottom of the throttle body to the intake ---
**Author:** ![Bacon](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bacon/32/7230_2.png) [@Bacon](https://forums.speedlife.net/u/Bacon)\ **Post date:** [March 6, 2008, 9:23am UTC](https://forums.speedlife.net/t/miata-wont-run/44515/9 "2008-03-06T09:23:11Z")
Weren’t you having an issue with the IAC prior on this? Maybe something not connected back up possibly as well on the vaccum side. ---
**Author:** ![zwarbyt](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/zwarbyt/32/7623_2.png) [@zwarbyt](https://forums.speedlife.net/u/zwarbyt)\ **Post date:** [March 6, 2008, 9:26am UTC](https://forums.speedlife.net/t/miata-wont-run/44515/10 "2008-03-06T09:26:36Z")
sometimes depending on the connector it is easy to hook up a tps backwards ---
**Author:** ![dftsilvia](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/dftsilvia/32/7447_2.png) [@dftsilvia](https://forums.speedlife.net/u/dftsilvia)\ **Post date:** [March 6, 2008, 11:07am UTC](https://forums.speedlife.net/t/miata-wont-run/44515/11 "2008-03-06T11:07:18Z")
sounds like a mass air flow sensor if the miata even has one. dont they have the funny looking ones like the probes n older fords ---
**Author:** ![boardjnky4](https://avatars.discourse-cdn.com/v4/letter/b/96bed5/32.png) [@boardjnky4](https://forums.speedlife.net/u/boardjnky4)\ **Post date:** [March 6, 2008, 12:08pm UTC](https://forums.speedlife.net/t/miata-wont-run/44515/12 "2008-03-06T12:08:35Z")
i would definitely test the tps, I had issues with that on my civic and the symptoms were very similar. ---
**Author:** ![escgt](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/escgt/32/7512_2.png) [@escgt](https://forums.speedlife.net/u/escgt)\ **Post date:** [March 6, 2008, 4:54pm UTC](https://forums.speedlife.net/t/miata-wont-run/44515/13 "2008-03-06T16:54:36Z")
you recently did a head gasket right? ---
**Author:** ![Minglor](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/minglor/32/7373_2.png) [@Minglor](https://forums.speedlife.net/u/Minglor)\ **Post date:** [March 6, 2008, 10:10pm UTC](https://forums.speedlife.net/t/miata-wont-run/44515/14 "2008-03-06T22:10:58Z")
Thanks for all the input. 16 hour shifts are not helping get around to working on this damn thing. Every plug is connected to it connector. I am going to just hit things with hammers. It is a 93. And I am only worried that it is an electrical issue But I am just thinking I got another fucked AFM (new one enroute) When I get some garage time I’ll post up another list of shit I checked. ---
**Author:** ![dmoffitt](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/dmoffitt/32/7455_2.png) [@dmoffitt](https://forums.speedlife.net/u/dmoffitt)\ **Post date:** [March 6, 2008, 10:38pm UTC](https://forums.speedlife.net/t/miata-wont-run/44515/15 "2008-03-06T22:38:55Z")
ouch, good luck with it man ---
**Author:** ![escgt](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/escgt/32/7512_2.png) [@escgt](https://forums.speedlife.net/u/escgt)\ **Post date:** [March 6, 2008, 11:24pm UTC](https://forums.speedlife.net/t/miata-wont-run/44515/16 "2008-03-06T23:24:04Z")
$10 for your miata 😃 ---
**Author:** ![dftsilvia](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/dftsilvia/32/7447_2.png) [@dftsilvia](https://forums.speedlife.net/u/dftsilvia)\ **Post date:** [March 7, 2008, 5:14am UTC](https://forums.speedlife.net/t/miata-wont-run/44515/17 "2008-03-07T05:14:37Z")
if you unplug your afm. if it runs the same with it unplugged u have a bad one ---
**Author:** ![yunvme666](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/yunvme666/32/5065_2.png) [@yunvme666](https://forums.speedlife.net/u/yunvme666)\ **Post date:** [March 7, 2008, 5:36am UTC](https://forums.speedlife.net/t/miata-wont-run/44515/18 "2008-03-07T05:36:23Z")
i wouldnt say that , your fuel turn on/off switchis inside the airmeter its allows voltage when the flap goes off closed, if you think its the meter jump the 2 pins for fuel and it should run with the meter unplugged… ---
**Author:** ![longuyen88](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/longuyen88/32/7611_2.png) [@longuyen88](https://forums.speedlife.net/u/longuyen88)\ **Post date:** [March 7, 2008, 6:40am UTC](https://forums.speedlife.net/t/miata-wont-run/44515/19 "2008-03-07T06:40:51Z")
what happen to v8 swap? ---
**Author:** ![stmotorsports](https://avatars.discourse-cdn.com/v4/letter/s/bb73d2/32.png) [@stmotorsports](https://forums.speedlife.net/u/stmotorsports)\ **Post date:** [March 7, 2008, 8:47am UTC](https://forums.speedlife.net/t/miata-wont-run/44515/20 "2008-03-07T08:47:08Z")
> [@Minglor"](#): > > …my intake piping which is currently an elbow off the JR intake … am i to assume this means you have a JRSC on the car? if so your bypass valve could be stuck closed, such a condition will cause similar behavior as the engine is trying to idle on boost which is no good [Next page](https://forums.speedlife.net/t/miata-wont-run/44515.md?page=2)