Acorn
Forum Member
Posts: 95
|
Post by Acorn on Oct 6, 2014 11:31:37 GMT
Trying to get the T started today and it dont want to play, All plug leads are ok, fuel ok trys to start then blows back through the carb, advance the timing then just turns over go back to far and it backfires through exhaust. Trying to get ready for Whitby so any suggestions would be a help.
|
|
Russ D
Full NHRC Member
Site Cleaner & General Baffoon.
The 70's! It's the future.
Posts: 2,235
Signature: The 70's is tha future!
|
Post by Russ D on Oct 6, 2014 14:05:17 GMT
Dizzy in right? Firing order etc?
|
|
|
Post by Saleen989 on Oct 6, 2014 15:21:11 GMT
|
|
|
Post by Saleen989 on Oct 6, 2014 15:40:09 GMT
Just done a quick "google" for you: www.scmodeltford.org/part-i-2/By E. Meloan (This article was originally published in the March, 2003 issue of the Spark Coil.) Howdy, fellow Model T’ers! I’d like to spend a couple of articles discussing the Model T electrical system and problems that can keep our car from getting us out on the road! The 1909 through 1914 T’s have a very simple system. Two wires are attached to the coil box to provide electrical current. Looking at the box from the front of the car, the post on the lower right has a wire that connects to the magneto terminal on top of the hogshead (transmission cover). The post on the coil box is connected through a wire inside the box to the Magneto side of the coil switch. Located on the lower left of the coil box is the battery terminal which was usually hooked to the positive terminal of a six volt battery or a group of six lantern batteries to provide current for starting the car. An internal wire inside the box will connect this post to the “Battery” side of the coil box switch. A third wire goes from the switch down to the copper strip on the bottom of the coil box which contacts the button on the bottom of each coil to provide the positive voltage. Four wires are attached to the row of posts along the top of the coil box which connect to the timer (commutator) Again, looking from the front of the car, the left wire should go to the post on the timer that is grounded when the spark plug in number one cylinder fires. The second post from the left is cylinder two. The third three and the forth, cylinder four. The actual firing order for the “T” engine is 1,2,4,3 so we must be remember to reverse the wires on the timer for 3 and 4! Add four high tension wires which go from the lower row of posts to the spark plugs and you have the total wiring system for a pre-1915 T! While six volts will start the car, it is not enough voltage to operate the coils well at speeds above about 20 miles an hour. So, you turn the coil switch to the “Bat” side to start on battery and when the engine is running, move the switch to “Mag” for driving. A good magneto will put out 20 to 30 volts and make the coils really sing! The electrical problems with the 09/14 system were pretty much limited to loose connections or shorts in the commutator wiring and coil problems. Probably the most likely spot for trouble is the commutator and commutator wiring. I’d be hard pressed to think of a worse location for a timer than the one on a “T”! It’s not easy to get at, it gets wet and coated with oil and the connections are very close to things that can short them out! Looking again from the front of the car, the commutator contact at the 11 o’clock position will normally be number one. The timer rotor turns counter-clockwise so the number two contact will be the one at 8 o’clock. That takes care of the two contacts on the left side of the timer. The bottom right contact (4 o’clock) will have number 4 (NOT 3) because 4 fires BEFORE 3. And the contact at the 2 o’clock position will connect to the number 3 coil. Common problems are timer wires that have broken off from the continual flexing and wire connectors on the timer contacts that touch the timer advance rod as it moves through its arc. Also check for pan bolts that can short out the lower contacts on the timer case. If you remove the sparkplug wires from the plugs and switch on the battery, each coil should buzz as you hand crank the engine slowly. Disconnecting the sparkplug wires can save you from a broken arm should there be a short that makes a coil fire when its piston is in the wrong position! You can quickly check your timer wiring by shorting out each timer contact to the timer case with a screw driver and checking to make sure that the proper coil buzzes with the proper timer contact. One last thought… Not all timers fire at the same position! The little tool sold to set timing by the “T” suppliers was meant for the original Ford timer. NOT for the New Day or the Anderson timer! We’ll continue this discussion in the next newsletter. See you down the road…
|
|
Acorn
Forum Member
Posts: 95
|
Post by Acorn on Oct 9, 2014 8:10:56 GMT
Sorry guys dont think i gave enough info,The T has a small block chevy this is what ive done so far rotor arm pointing to number 1 with timing mark at 8degrees before tdc all plug leads are in the right place for firing order 1 8 4 3 6 5 7 2. Tried swaping leads round dont make any differance still blows back through the carb. Ive tried cups of tea cigs even cider and still dont know whats wrong. please HELP!!!!!!!!!!!!
|
|
Russ D
Full NHRC Member
Site Cleaner & General Baffoon.
The 70's! It's the future.
Posts: 2,235
Signature: The 70's is tha future!
|
Post by Russ D on Oct 9, 2014 14:24:29 GMT
Sounds like the same problem we had with Drannys, is the Dizzy 180 degrees out? Take rocker cover off and turn it so no1 is fiiring at tdc and see if inlet valve is opening. Im betting exhaust valve is opening not inlet.
|
|
Acorn
Forum Member
Posts: 95
|
Post by Acorn on Oct 9, 2014 14:47:29 GMT
not thought about doing that going back in garage now will let you know later cheers
|
|
32sedan
Addicted
Moderator
Posts: 503
Signature: Stopping at a petrol station near you soon.
|
Post by 32sedan on Oct 9, 2014 19:16:58 GMT
Has it got a aftermarket hei dizzy? If so check it has not got a thick rubber gasket between the block and the dizzy. Had a load of trouble with Drannys and it was caused by this, the gear was not meshing with the cam gear causing it not to run.
|
|
Acorn
Forum Member
Posts: 95
|
Post by Acorn on Oct 10, 2014 11:49:08 GMT
Well!! Tried Russ,s suggestion its a bit better but still not running sounds like it wants to though.No rubber gasket on dizzy. Not touched engine today got a load of little jobs done might have another go later.Thanks guys
|
|
Russ D
Full NHRC Member
Site Cleaner & General Baffoon.
The 70's! It's the future.
Posts: 2,235
Signature: The 70's is tha future!
|
Post by Russ D on Oct 10, 2014 12:08:45 GMT
Which valve was opening when no.1 was on copression stroke?
|
|
Starlyte
Full NHRC Member
Starting again after 30yrs
Posts: 662
|
Post by Starlyte on Oct 10, 2014 13:42:54 GMT
Is the carb accelerator pump working (are the plugs getting wet) and are you sure all plugs are sparking.
Try a few sprays of easy start.
Is the battery a good one and turning engine fast enough.
|
|
Acorn
Forum Member
Posts: 95
|
Post by Acorn on Oct 10, 2014 16:10:24 GMT
Plugs are getting wet very good battery and plugs are sparking. 2nd valve(inlet) Should i pull the dizzy out and start again from scratch? Hell of a way to spend a Holiday still got all next week to go yet. Think i might go and lie in somebodys porch then itll all go away!
|
|
Russ D
Full NHRC Member
Site Cleaner & General Baffoon.
The 70's! It's the future.
Posts: 2,235
Signature: The 70's is tha future!
|
Post by Russ D on Oct 10, 2014 17:12:50 GMT
Ok, be careful here, this is where we got cought out with Drannys. If you do that take off both rocker boxes first and check for any valve damage, that may cause the poppin back through the carb. Keep turning engine manually, ensure all valves are opening and closing in the right way in the right order and fully closing. If not it may be a valve or a worn cam lobe or bent valve if they arent closing or opening fully, are all valve springs ok? Check that first also. Only then get no1 to TDC on compression, with dizzy cap off, check rota arm is pointing to no1. Then one by one replace leads. I cant just remember what went wrong with Drannys, but it was somoething to do with the Dizzy not turning as it should. Big D will be able to shime a bit of light on that me thinks.
|
|
Acorn
Forum Member
Posts: 95
|
Post by Acorn on Oct 14, 2014 10:19:42 GMT
Nearly there would have had it running last night but ran out of petrol and electricity, so battery on charge petrol in the tank try again later.It looks like all this trouble could be down to it not having an earth from the engine to the frame (wont earth through rubber engine mounts) DOH. Looks like i might need a new starter motor if anybodys got one for sale give us a shout. Pre 1974 sbc. Thanks again guys for all your ideas this what a clubs allabout!!!!
|
|