Mexican Beetle 1600i Flat spot help!

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paullanzarotti
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Mexican Beetle 1600i Flat spot help!

Post by paullanzarotti » Sat Dec 13, 2014 4:12 pm

I have a 1998 Mexibug that is suffering from a pronounced flat spot at low revs which makes it not much fun to drive.

I have cleaned out all the breather pipes, replaced Relay 30, replaced the idle control valve and still the problem persists.

I obviously need to get the car plugged into VAGCOM software but I haven't been able to find anyone in London or the UK that has the right software/3 pin plug and experience to help with this matter.

I know Phade is the expert on Mexibugs FI but I haven't been able to get hold of him. Does anyone know of anyone else in the UK (or London) that could help?

Thanks in advance people!

Paul

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vwjim
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Re: Mexican Beetle 1600i Flat spot help!

Post by vwjim » Wed Sep 13, 2017 6:51 pm

Paul,

What was the cause of your flat spot?

Cheers.
Jim

paullanzarotti
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Re: Mexican Beetle 1600i Flat spot help!

Post by paullanzarotti » Thu Sep 14, 2017 1:56 am

After having the ECU chipped by Manfred in Germany and changing every sensor and vacuum pipe I ditched the ECU and distributor for Megsquirt and Wasted Spark and now the car flies! Quite a significant difference to say the least.

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vwjim
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Re: Mexican Beetle 1600i Flat spot help!

Post by vwjim » Thu Sep 14, 2017 4:39 am

Blimey, that's an extreme swap.

Before you changed to megasquirt, did you change the factory coil pack & or distributor? wondering if your problem was in there.

Thanks for your quick reply.

Jim

paullanzarotti
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Re: Mexican Beetle 1600i Flat spot help!

Post by paullanzarotti » Thu Sep 14, 2017 4:58 am

Yes - leads, everything. Other people have the same issue - you cannot hold revs steady between idle and 1150 RPM.

My car would idle at 820 and do nothing but lean out a little before jumping to 1150rpm. There was a clear hole in the rev range at low revs. Makes for very lumpy traffic driving!

paullanzarotti
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Re: Mexican Beetle 1600i Flat spot help!

Post by paullanzarotti » Thu Sep 14, 2017 4:58 am

Yes - leads, everything. Other people have the same issue - you cannot hold revs steady between idle and 1150 RPM.

My car would idle at 820 and do nothing but lean out a little before jumping to 1150rpm. There was a clear hole in the rev range at low revs. Makes for very lumpy traffic driving!

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paul_f
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Re: Mexican Beetle 1600i Flat spot help!

Post by paul_f » Thu Sep 14, 2017 11:20 am

When you changed to the megasquirt did you keep the injectors?

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Paul H
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Re: Mexican Beetle 1600i Flat spot help!

Post by Paul H » Sat Sep 16, 2017 3:18 am

People seem to start out with the mexican injection and end up changing everything eventually
Real parts=Real Performance-Get Real
Opinion is the medium between knowledge and ignorance (Plato).

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