View Full Version : trouble with twin 40s
i just cant get my t40 s to run my engine i ve replaced the standard 1.4 head with a 1.3 head an some dehelloro twin 40s the timing seems to be spot on i tried turning the dizzy slighty either way but it makes no difference.the engine will turn over but it wont fire up ,
is there anything inside the carbs that could be broken or not put back properly (i havnt stripped them down but the previous owner said they had)
its got a spark an fuel is going to the carbs but it wont start :cry:
is there anything obvious i ve missed how hard is it to rebuuild the carbs ?
You can get a rebuild kit for the carbs.
If your getting a spark, compression anf fuel, it should start right up.
What were the carbs jetted for?
mad-driver
12-07-06, 12:17 AM
this may sound silly, but on the alternator there is like an earthing cable, when putting all the stuff back together after fitting, it would turn over but not fire, and it was becuase i hadnt connected the earth?
Just a thought
womble sri
12-07-06, 10:31 AM
tow it up the road it and stick in gear!
a freind of mine done that, and booted it, with the towing car obviuosly in front, you can pretty much imagine what happend next lol lol lol
a freind of mine done that, and booted it, with the towing car obviuosly in front, you can pretty much imagine what happend next lol lol lol
http://i56.photobucket.com/albums/g161/draper01/plank.jpg
i was thinking more...
http://www.northerngrid.org/ngflwebsite/seedtosaw/images/sawmill/mixed%20length%20planks.JPG
i was thinking more...
http://www.northerngrid.org/ngflwebsite/seedtosaw/images/sawmill/mixed%20length%20planks.JPG
lol lol
:thumb: know what i mean! lol lol
Google images, you cant beat it yeah! Go on there and search "short plank" and pictures of people come up! lol lol
the earth lead ,mine was off of the car for ages while found a longer enough adjuster plate were do both ends of the wire go to its possible i may have put it on wrong ?
checked the cam timing it seems to be right when the notch on the cam pulley is in line with the mark an number1 piston is up ,the rotor arm points to plug lead so it should be fine
they are jetted for a 1.3 but i am using a 1.3 head so they should irun it
the earth lead ,mine was off of the car for ages while found a longer enough adjuster plate were do both ends of the wire go to its possible i may have put it on wrong ?
checked the cam timing it seems to be right when the notch on the cam pulley is in line with the mark an number1 piston is up ,the rotor arm points to plug lead so it should be fine
they are jetted for a 1.3 but i am using a 1.3 head so they should irun it
lol gotta love that quote "its a 1.3 head so it should be fine......" bar the fact its pulling in more air due to it being a bigger capacity engine :tard:
The wire basically goes between the adjuster bolt and the block to bypass the rubber mounts that the alternator bolts to.
Should still run tho, jetting shouldn't be that far out, if its for a 1300 and its on a 1400.
Are the plugs wet with fuel when you remove them?
Does the engine fire, or just keep turning over.
it turns over but doesnt fire, the plugs were a litle bit wet but no soaked ,an the amount of time i spent turning it over i am suprised it didnt flood t .
do think i should look at fuel delivery i cant see what would stop them from getting enough fuel though how easy are they to strip an rebuild an what signs should i be looking for ?
just for your interest...
Mine Started up fine, after putting a set of very badly jetted (and for a 1.3) Dellorto's on my 1.6 GSi engine.
You shouldn't be having problems. i'd take a look at the carbs as your next port of call
at first glance they look fine what should i be looking for when i rip em apart
dirt/blocked jets bascically..
i ve had another look no fuel is getting to the plugs they are bone dry ,( i sprayed some easy start down carbs an it fired) so i think either faulty fuel pump or something wrong with carbs (the guy i bought em off also sold me a digi dash that turned to be fooked )
i ve got a new fuel pump when i removed the old 1 it stayed in the cam hosing until i pulled it out
i went to fit the new one an i had to push against the spring to get it in ,
so i thought maybe it was wrong tryed to refit old one this was the same , so maybe the lobe thing on the pump was sticking.
i ve got the new pump on now but need to get some more fuel pipe as it split when i removed it
the new pump is different to the old one both pipe stubs are horizontal but at the same side, an the lobe thing is slighty narower an longer is this just a late spec pump ? the part num is 93151805
Ye, its just a later style pump.
Should work fine.
is there anything inside the carbs that known to break/wear out ?
check the float heights so that fuel is getting in the bowl. to start try booting a few times to push some fuel out the pump jets. Turn the key and as it turns over gently apply a bitof throttle and see if it fires.
also STOP using easy start. its like Coke for cars lol.
right i ve fitted my new fuel pump but it still wont runi have tried it with an with the regulator an still no fuel is getting to the plugs, but it is getting to the carbs ,is there anything else that stop it getting to the plugs aparts from a fault with the carbs as the lad i got them off told me they had been rebuilt ?
also were can i get a new set of internals jets etc ?
forcot to mention if i spray deodrant in the carbs it fires
Firing shows its sparking.
If fuel is getting to the carbs, but not into the cylinders, only thing stopping it is the carb jets etc.
Is fuel getting to the float bowl? ie take off the cover plate and have a look. Have you checked fuel is coming out the fuel pump? If it isnt then you'll need to take all the jets out soak in carb cleaner and blast through with compressed air. I'd also be tempted to do the same to the carb body.
its a new fuel pump i replaced it cos i thought the old one maybe have been sticking ,dont know if its gettin to float bowl will have a look
i stripped the carbs today they are spotless inside but i blew jets out with airline anyway
am i right in thinking that when the throttle is used you should see petrol being squirted down the bore ?
there is petrol in the bowl underneath an in the top under the top metal cover but none is being squirted down the bores ?
this is really starting to f#ck me off
You need to open the throttle quickly and you should see the fuel fly out. If the carb is off be careful as you may squirt yourself in the eye ;-). If it doesnt then there is something wrong with the pump jet circuit. If thats the case take the carb off and remove the little plate on the surface where the carb bolts to the manifold and see that when you open the throttle all the bits in there move. Check that then come back.
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