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Old 07-08-2016, 12:34 PM   #1
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Default Snail's 94 Miata troubleshooting/build thread

Hi everyone,
A little background, I picked up this car roughly 1 year ago. It is a 1994 1.8L Miata with a homemade turbo kit. MSPNP. RX7 injectors (i think)

The previous owner had lifter noise and proceed to change the lifter, waterpump, belts, etc... Since then it hasn't ran correctly. I finally think I have the motivation and time to tackle this project and figure this out. The tune in MSPNP is gone, erased, deleted so that is not helping.

My game plan is as follows and will start this weekend.

-re-install stock injectors & ECU
-get the car to run with that combo first.

I have owned a Turbo Diesel Cummins that had close to 600hp, a mazdaspeed 6 that remained stock, I now own a 87 Grand National and a modded Arctic Cat turbo snowmobile. I'm new to the miata world so bear with me I don't know this car and where everything is located.
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Old 07-10-2016, 12:48 PM   #2
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Little update.

Put new new plugs in, cranked and cranked and have dry plugs.

tore into the fuel tank. Took out the pump and tried feeding it 12V, nothing.
also found the battery was bulged up after charging so that's done too,
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Old 07-18-2016, 08:03 AM   #3
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installed new 190lp walbro pump. and it runs and idles alot smoother than it ever did under my possession - progress.

had a puddle of fuel under the car - step backwards
injector#3 leaking- ripped everything apart and found a cracked o-ring. will replace o-rings on all 4 injectors. (RX7 injectors)
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Old 07-18-2016, 08:11 AM   #4
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Did you verify the TB was installed correctly? That was probably the only issue.
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Old 07-18-2016, 08:15 AM   #5
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sounds like you have already made good progress. you might want to consider going in and making sure the timing is set correctly as described in the megasquirt documentation.
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Old 07-18-2016, 08:46 AM   #6
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Quote:
Originally Posted by Braineack View Post
Did you verify the TB was installed correctly? That was probably the only issue.
I think it's installed correctly. I don't understand what could be installed incorrectly.
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Old 07-18-2016, 08:46 AM   #7
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Quote:
Originally Posted by mmmjesse View Post
sounds like you have already made good progress. you might want to consider going in and making sure the timing is set correctly as described in the megasquirt documentation.
that is on the to do list once I get the fuel injector situation sorted out. Thanks for your comment.
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Old 07-18-2016, 10:08 AM   #8
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Quote:
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I think it's installed correctly. I don't understand what could be installed incorrectly.
it can easily be done wrong putting the cams and crank out of spec. i would grab a copy of the factory service manual from net and make sure the timing marks are aligned correctly.
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Old 07-18-2016, 12:32 PM   #9
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oh TB = timing belt, i thought trottle body lol

yes that was checked and installed correctly. marks line up where they should.
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Old 07-18-2016, 12:48 PM   #10
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heheh. i was going to say!
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Old 07-19-2016, 01:40 PM   #11
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so found out i have 550cc RX7 injectors.
ordered the oring kit to fix my fuel leak. should be back up an running and ready to post logs this weekend or early next week.
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