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Old 07-02-2011, 03:41 PM   #1
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Default Running super lean, mspnp + lc-1

It is with great regret that my first post on this forum is a plea for help, but here goes.

The deal is, I've recently fitted my turbo conversion and mspnp. It came with the previous owners map on who had a very similar setup. So some minor tweaking saw it running pretty sweet. Today it's been driving fine all day, was running the ve analyze live for a good hour and a half. Threw the new table on. Everything seemed fine. But then took it out and it wasn't boosting properly, felt like it was holding back at and around WOT.

Then it started running mega lean, 20s at idle, 18s at cruise. And generally running like a complete bag of spanners. Put a couple of old tunes on but still the same.

Got it back to my mates taking it real easy.

Changed the Gego correction authority and its sitting at 120% trying to obtain a decent idle, but it goes really lean under throttle.

AIT readings are fine, as is coolant, no obvious leaks, all seems okay really...

A bit stuck as to what to try to fix it. Still really new to the whole megasquirt thing :(

In case it may be related, my wideband sometimes reads 30+ with engine off and very occasionally on lift off etc, didnt realise they went that high! It was only calibrated a couple of weeks ago.

Also noticed my crank pully seems pretty wobbly at idle, more noticeable as my idle is fluctuating. but under throttle it smooths out fine. Pretty worried about that though!

Anyone any ideas??

Would love to be able to get it home tomorrow, about 60miles!

Thanks in advance!

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Old 07-05-2011, 10:36 AM   #2
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If it suddenly started running lean, I would recommend checking your fuel pressure.
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Old 07-05-2011, 11:02 AM   #3
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Why don't you show us a log and or your .msq?
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