My 1992 Miata is Hard to Start and Runs Rough - Miata Forumz - Mazda Miata Chat Forums
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NA (1989-1997) NA Miata discussion within. The MX5's first generation, the NA, sold over 400,000 units from 1989 to 1997.

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Old 11-19-2013, 10:39 PM   #1  
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Default My 1992 Miata is Hard to Start and Runs Rough

Hello to all,
I'm new to the forum, I am also new to Miata's. I bought this 1992 Miata for my Daughter for her graduation. Really cute car. We went to California to pick it up and drove it to Reno where it died.

I assumed fuel pump and replaced it. Still no luck. This car is very difficult to start. I have jumped the F/P and Ground and I can get the car to start... it takes some cranking and standing on the gas, but it will start.

Once it is running it runs OK not great. But once it warms up it does a little better. But here is the crazy part once you turn on the A/C it starts to choke out and runs like garbage.

Any advice is greatly appreciated, I am pulling my hair out here and I'm bald...lol I'm looking for someplace to start... I don't know where to begin to fix this.

Thank's Everyone
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Old 11-20-2013, 06:07 PM   #2  
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I'm contemplating what to check. Let me consult with a few folks.
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Old 11-20-2013, 06:27 PM   #3  
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First things first, check for any diagnostic codes.

Miata Computer Diagnostic Fault Codes
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Old 11-20-2013, 06:44 PM   #4  
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How many miles on the car? Find someone with a working 1.6 NA and ask to borrow his AFM to see if that solves the problem. If it does, replace it.
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Old 11-20-2013, 07:29 PM   #5  
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I have a working AFM you can borrow for troubleshooting if you need.
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Old 11-20-2013, 08:34 PM   #6  
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Im in reno with a working AFM we can test with from my miata, if you really want.
<<< dont mind the low stats, ^^^these guys know me.



Also, check the little tube from intake to throttlebody, its a small rubber hose that runs from a nipple on the intake tube to the IAT sensor

Last edited by Pen2_penguin; 11-20-2013 at 08:36 PM.
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Old 11-21-2013, 07:17 AM   #7  
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Known working AFM is a good call. Pen2 is good people, he can get you set up.

(Man, I need to post over here more often as well)
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Old 11-21-2013, 09:14 AM   #8  
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Quote:
Originally Posted by EO2k View Post

(Man, I need to post over here more often as well)
Tell me about it! I honestly don't know why I stopped posting here.
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Old 11-21-2013, 10:11 AM   #9  
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Quote:
Originally Posted by dieselmiata View Post
Tell me about it! I honestly don't know why I stopped posting here.
Maybe because there was no one else posting here at the time. I stopped checking the site when there were no new posts for weeks.
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Old 11-22-2013, 06:23 AM   #10  
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We get noobies here all the time lately. We just don't get a whole lot of people saying "Welcome to the forum!"
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