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deverett

Purge fan

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On hot days, after I stop for awhile it's very hard to restart. I saw some posts about fuel vapour in the airbox and someone suggested a purge fan.

Has anyone installed a purge fan? and if so do you have some photos, part numbers or advice?

Thanks,

Dave

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Guest Georgie

Hi Dave

Over here in west oz we get very hot weather and the problem that you are getting sounds like evaporation especialy after shut down you would have a lot of hot air and no fresh air coming in just my thoughts

Cheers

George

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The later Excels ('87 MYv onwards) had a pump fitted which does this. The '87 is a lot easier to start when warm than my '86 so I guess that pump helps.

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So it sounds like I just need to install a tube in the airbox and an air pump, maybe have it vent into the breather tube. I could run the pump via a switch under the dash like the aerial switch.

Dave

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I could run the pump via a switch under the dash like the aerial switch.

I think the ones fitted to later Esprits were on a timer or maybe a thermometer.

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I think the ones fitted to later Esprits were on a timer or maybe a thermometer.

On my n/a its has a 3rd otter switch in the big curved ally coolant pipe that switches it.

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Guest

On my 81 Turbo when I had it apart, there was a strange lilac wire poking out of the harness by the RHS fuel tank. Wiring diagram says this is the feed for an "engine bay blower motor", so the first win is that you may not have to do a huge wiring job.

Try speaking to your favorite Lotus Specialist and see if you can obtain an air stat and the fan with its mountings. I doubt it will be hard to fit, after all it would just be a deletion for climates that do not require it.

And let us know how you go - I fancy this mod for my car - a UK spec now living in tropical Queensland...

Cheers!

Rob T.

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I've had no luck finding a source for a purge pump. I also need a solenoid valve looking at te turbo service manual.

My concern with building something from scratch is I might ignite the vapour with a spark if I have the wrong pump.

No one seems to know where to get spares for this.

Dave

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Later Excels have a purge pump fitted, driven by an engine temperature switch.. I don't know if this could be adapted (if you can get one that is).

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There is a write up on excel.net http://www.lotusexcel.net/phpbb/viewtopic.php?f=8&t=4853&p=40095&hilit=purge+pump#p40095

which shows with photos how to replace the motor with a new one from maplin. Less than £10 from memory. Its a bit of a job getting the casing apart but once split its quite easy to replace.

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I thought they were standard, my 88 stevens had one, plumbed into the bottom of the plenum. Totally useless, now resides on a shelf in the garage.

ie, I don't think it's a solution to your problem.

Over here in Coffs Harbour, mine starts faster hot than cold.

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