Porsche 924 ht lead set up

[muthawhat]

Ok, bought a 925 off a chap on the 924 owners forum. It is a total so and so today tart, then when it does start it misses and sounds lumpy like it's running on 2/3 cylinders. I've checke all the normal thing like fuel, air leaks, compression etc.. Started checking timing, seems all good, flywheel marker lines up with cover marker etc.. Except.. From all the info I have found online, it says the leads should go clockwise 1342 from where rotor arm sits at tdc but mines set anti clockwise. I changed leads round to do this and it just backfired and won't start! So am I being mislead or am I some how confusing clockwise? :/ here's a picture to try and elaborate.


So bottom left is 1 (where tie arm points) clockwise from there top left is 3, top right 4, bottom right is 2? Am I going mad?

[nomad]

Fact : firing order is 1-3-4-2 according to www.porsche924-944.nl/manual/Haynes/05_Ignition.htm

Unless anyone comes up with any better ideas try ...

Quickfix : Expect a pair of plugleads to be mixed up, remove leads 1 at a time and try to start it -
if worse you have just removed a "good" lead (put it back )
if no worse flag it - repeat until you find the other "wrong" lead and swap them over  
(or just swap leads 3 & 2, then go for it )

Proper check of pluglead order :
turn off ignition, make all checks with ignition off to save shocks!
remove distributor cap
* option A - make sure next step is compression stroke if possible not exhaust stroke (maybe remove plug #1 and put finger on hole to confirm ?)
Turn engine to just before TDC on cylinder #1 (line up firing marks), expect rotor arm to be pointing to pluglead #1 (bottom left in your pic)
* Option B - if it's pointing to #4 and you didn't check for compression stroke, just rotate engine 360* to get rotor arm pointing to #1
Now check - pluglead #4 on cap has to be opposite pluglead #1

Manually turn engine crank 180* - note direction rotor arm turns - rotor arm should move 90* to next pluglead ** check this is pluglead #3
Now check - pluglead #2 has to be opposite pluglead #3

Feb 27, 2015 13:33:21 GMT muthawhat said:

Am I going mad?

I've answered the easy "it's broke - how do I fix it" question, I'll leave the difficult stuff for somebody else 

[spandelly]

I thought the firing order was stamped on the cam cover or am I remembering wrong?. Make sure you set tdc off the cam and crank because my last one had an extra mark on the cam sprocket that threw me when I was timing mine up.

[muthawhat]

Thanks guys, yes the firin order is on the can cover, it just the direction it goes on the dizzy cap. As I was told clockwise from tdc mark and it does NOT like running like that :/

[stevek]

I think I had the same miss-leading cam sprocket marker problem as spandelly had. There are some pictures on pg1 of my 924 thread (click link in my sig).

-Steve-

[steveo3002]

roar the engine over with the cap off so youre 100% on what way the rotor spins , then there should be a little line on the edge of the dizzy to show where number 1 is

[muthawhat]

Y I've got it timed up correctly I believe. I'll give it ago to see which way it spins, thanks.. Hadn't thought of that!

[muthawhat]

And I looked at the shonky rocket thread for efferent before.. Good read!