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 Post subject: Any good ecu people on here
PostPosted: Thu Jul 13, 2017 5:32 am 
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Joined: Sun Jul 02, 2017 11:42 pm
Posts: 8
Location: U.K.
Hi
I've been having trouble with my swift mini . Hits limiter at 4,900 rpm. We took the ecu apart at work today and noticed a wire which we traced from terminal that it goes to the coil. This link wire across the circuit board.
I got home and took apart a ecu I have that don't run due to previous owner burnt it out while welding the car so the one I'm using now is a replacement that has this wire.

Any ecu people on here know more about this ?


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 Post subject: Re: Any good ecu people on here
PostPosted: Thu Jul 13, 2017 5:33 am 
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Joined: Sun Jul 02, 2017 11:42 pm
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Location: U.K.
Ecu with limiter at 4,900 rpm


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 Post subject: Re: Any good ecu people on here
PostPosted: Thu Jul 13, 2017 5:34 am 
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Joined: Sun Jul 02, 2017 11:42 pm
Posts: 8
Location: U.K.
Ecu that don't work but no wire?


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 Post subject: Re: Any good ecu people on here
PostPosted: Thu Jul 13, 2017 9:38 pm 
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Joined: Sat Mar 08, 2008 1:07 pm
Posts: 1065
Location: Western Australia
Choochoo wrote:
Hi
I've been having trouble with my swift mini . Hits limiter at 4,900 rpm. We took the ecu apart at work today and noticed a wire which we traced from terminal that it goes to the coil. This link wire across the circuit board.
I got home and took apart a ecu I have that don't run due to previous owner burnt it out while welding the car so the one I'm using now is a replacement that has this wire.

Any ecu people on here know more about this ?
Hi Mate,

Best to send a PM to member "Rhinoman" who is based in the U.K.

Website: http://www.rhinopower.org/

Cheers,

Drew

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 Post subject: Re: Any good ecu people on here
PostPosted: Fri Jul 14, 2017 6:50 am 
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Joined: Mon Apr 11, 2005 1:57 pm
Posts: 574
Location: New Zealand
There's something else wrong if the limiter kicks in @4,900rpm


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 Post subject: Re: Any good ecu people on here
PostPosted: Fri Jul 14, 2017 8:09 am 
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Joined: Sun Jul 02, 2017 11:42 pm
Posts: 8
Location: U.K.
Thanks for reply I have emailed that company

As for limiter I don't know if it is 100% rev limiter but sure would like it piping and banging


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 Post subject: Re: Any good ecu people on here
PostPosted: Mon Jul 17, 2017 4:37 pm 
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Joined: Mon Oct 12, 2015 11:30 am
Posts: 81
Location: Wellington
Hi Choochoo,

Some members offered some possible solutions to your issue in your earlier thread viewtopic.php?f=7&t=55075

As you mentioned you were not running standard clocks and you also had error code 24, Dave asked how the ECU was getting its speed reading. Have you investigated that? Would be great to post those results if you have.

Error 24, depending on which manual you read, points to the VSS circuit (Vehicle Speed Sensor) or the Speed Sensor Circuit. It seems to me like Dave is on the money so I'd suggest looking there first, rather than the ECU.

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 Post subject: Re: Any good ecu people on here
PostPosted: Sun Jul 23, 2017 11:01 pm 
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Location: BRISBANE
Few probable causes come to mind.

#1 (i have seen this happen twice now)
Faulty distributor. both times the fault created what seemed to be a rpm limit. Replaced distributor and problem solved.

#2 Valve float.
The general consensus on valve float occurs between 4600-5400rpm. This is mainly where harmonics come into play and also can create what seems like a rpm limit scenario.

#3 Distributor interruption.
you could be receiving some outside pulse or magnetic interruption from the distributor to the ecu.

For example a ignition lead (close to the distributor or distributor wiring) can send extra pulses to the ecu, in which the ecu thinks it's at rpm limit due to the extra pulses the ecu recieves.
The interruption could also be anywhere between the distributor and ecu..

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