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got a spark, got fuel.. cranks, but still not firing... - Fuel System/Carbs - The Lotus Forums Jump to content
ANDYR

got a spark, got fuel.. cranks, but still not firing...

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Wotcha.

 

got new:

 

distributer

starter motor

fuel pump and regulator

coil now out of nasty box and mounted on inside of engine bay

new HT leads

new plugs

ran perfectly... proper lovely.

 

 

left for a few weeks

 

won't start.

turns over okay

got a spark - tested with lead and plug on the head

was over fuelling when hot and/or on long drives and then ground to a halt hence the new blue top fuel pump and pressure regulator to keep it at about 4 p.s.i.  lovely no matter what. no embarrassing stalling.

 

no embarrassing non starting on the drive.

 

fuel pressure went up to 10! checked fuel guage and nothing stuck there.  Figured the carbs were flooded - perhaps muck from an empty fuel tank.... took the top of the carbs off, found it all flooded, opened the throttle to allow the fuel to clear. A little WD40 to get rid of muck on the bits. re-assembled.  Pressure now back to 4ish.

 

still wont fire.

 

what am in missing?

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Have you got timing 180 degrees out.. on dizzy..????

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AH.

 

Divvy.  I could have done that when being 'thorough'. the cap only fits one way as there is a noggin to stop such happening but I di take all the leads off to clear any moisture and debris from the leads...

 

As I face the back of the car. Looking at the engine, the dizzy points being roughly 12,3,6 and 9 o'clock...

 

I've got the order going anticlockwise...

 

4,2,1,3 with plug 4 at 6pm (the bottom), plug 2, 3pm, 1 at midday and plug 3 at 9pm.

 

that right?

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Depends. The distributor could be in any orientation, depending on what happened to the aux sprocket during a cam belt change.

 

You need to get the engine to TDC and make sure the rotor's pointing at no.1, then just follow the correct firing order round.

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That is pointing at number one on the firing stroke not the exhaust stroke..

when TDC..!!!

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cool.

 

okay.

 

the order is still 4,2,1,3 though, right?

 

and any tips on getting it over to TDC whilst on the drive?

 

thanks

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You can crank the engine over with the started while someone looks at the flywheel with a flash light. Not exactly the easiest way to get it to TDC but it does work.

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Just put it in third/fourth gear, make sure ignition is off

rock the car forward until the TDC mark on the fly wheel

is under the pointer, when done, check the cam dots to see

which cylinder is in firing position 1 or 4 . then you can check

your dizzy timing position and lead configuration is correct .

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Hi Andy,

 

I have to confess I managed to fit my dizzy cap on the wrong way up i.e. 180 degrees out. Lots of popping in the inlet manifold, but thankfully no fire.

 

Quick and simple to check - there was about 5 - 10 degrees play when on the wrong way, fitted snug the correct way (and the thing fired up too!)

 

LA

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