MAP sensor doesn't work... What am I missing.

General Megajolt Questions and Answers

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SleepingBlazer
Posts: 5
Joined: Thu Sep 30, 2010 5:03 am

MAP sensor doesn't work... What am I missing.

Post by SleepingBlazer »

I just got my setup running on my Chevy small block powered '84 s10 blazer.

The MAP sensor is hooked up but doesn't give a read out.
Its working like a mechanical advance dizzy at the moment.

I can't find any other MAP settings besides the one option in the configurator Options.

My vacuum seems abundant, there is plenty of hissing/whistling when I remove the hose.

Any suggestions????

NITROPIXIE
Posts: 704
Joined: Sun Sep 07, 2008 1:54 pm
Location: Fareham, GB

Post by NITROPIXIE »

Did you make the board yourself?? If so did you put the MAP sensor on the correct way round??

Ryan
1310 A-series Mini, lightened and built myself. V4 board and loving it

Rasputin22 - The Mini Forum
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SleepingBlazer
Posts: 5
Joined: Thu Sep 30, 2010 5:03 am

Post by SleepingBlazer »

Nope. Its a pre-assembled one.

brentp
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Post by brentp »

Hello,

Are you able to use the software to connect to the Megajolt and read / write ignition maps, and observe an RPM signal? Do you see any error messages in the bottom of the window like "timeout" or so on?
Brent Picasso
CEO and Founder, Autosport Labs
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SleepingBlazer
Posts: 5
Joined: Thu Sep 30, 2010 5:03 am

Post by SleepingBlazer »

I will have to check for errors again, but I am pretty sure there are none.
RPM signal is good.
Software works like it should.
Truck runs better than ever, just no MAP.

brentp
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Post by brentp »

Sorry if you've done this already- what if you watch the software and suck/blow into the map sensor port? you should be able to see the on-screen gauge move a bit, while the software is connected to the controller.
Brent Picasso
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brentp
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Post by brentp »

One more thing. When the Megajolt is powered up and connected to the software, but the engine isn't running- what is the KPa Value indicated in the config software?
Brent Picasso
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SleepingBlazer
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Joined: Thu Sep 30, 2010 5:03 am

Post by SleepingBlazer »

Tried sucking and blowing on the tube to no avail already.

The KPa gauge reads 100 (wot) at all times.

brentp
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Post by brentp »

Got it, thanks for checking. Can you follow up with us at sales@autosportlabs.com and we can help you further.
Brent Picasso
CEO and Founder, Autosport Labs
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