#1
|
||||
|
||||
Problem: loss of power when heating up - clues for the cause?
Took the F15A for a spin today.
Charged the battery, put in fresh gas, checked the fluids. All looked well and we took her for a drive. After about 10 min the engine started to loose power to the point I could no longer drive it. Could not see any problems. Let the truck cool down, it started right up. Drive off. When it heated up again, it lost power again and died. Let it cool down, started right up. Parked the truck at home, did not have time to take a proper look and it will have to wait till later this week. Meanwhile: clues, anyone? Thanks, Hanno
__________________
Regards, Hanno -------------------------- |
#2
|
|||
|
|||
Vacuum leak, I suggest. (Not really based on much experience, but I know older engines have pressurization requirements and falling off partway into a drive makes more sense than a whole lot of other thing.)
The other thing would be a clogged fuel filter. My father's old car had that trouble. Let it sit for a while and the particles in the filter fall away from the element and allow fuel to flow.
__________________
Terry Warner - 74-????? M151A2 - 70-08876 M38A1 - 53-71233 M100CDN trailer Beware! The Green Disease walks among us! |
#3
|
||||
|
||||
Breakdown of the coil. Classic example. Old coils start to act up when hot and then work OK when cold until they are hot again.
Ford flatheads with the divers helmet dizzy are notorious for this one.
__________________
3RD Echelon Wksp 1968 M274A5 Mule Baifield USMC 1966 M274A2 Mule BMY USMC 1958 M274 Mule Willys US Army 1970 M38A1 CDN3 70-08715 1 CSR 1981 MANAC 3/4T CDN trailer 1943 Converto Airborne Trailer 1983 M1009 CUCV RT-524, PRC-77s, and trucks and stuff and more stuff and and....... OMVA, MVPA, G503, Steel Soldiers |
#4
|
|||
|
|||
Yes, I would check Chris's suggestion.
__________________
Bluebell Carrier Armoured O.P. No1 Mk3 W. T84991 Carrier Bren No2.Mk.I. NewZealand Railways. NZR.6. Dodge WC55. 37mm Gun Motor Carriage M6 Jeep Mb #135668 So many questions.... |
#5
|
||||
|
||||
It could be with more ethanol in today's fuels it's boiling off causing the dreaded vapour lock
__________________
Neil Yeo 1940 11 Cab F8 |
#6
|
||||
|
||||
Hanno change the coil and fuel filter first then go for a drive.
__________________
Cheers Cliff Hutchings aka MrRoo S.I.R. "and on the 8th day he made trucks so that man, made on the 7th day, had shelter when woman threw him out for the night" MrRoo says "TRUCKS ROOLE" |
#7
|
||||
|
||||
spark
Hanno
If you remove the engine cover , then run the engine until it gets hot and the problem happens again. Then, remove a spark plug lead and get somebody to hold the lead near an earth approx. 5-6mm away , turn the engine over and look for a spark from the lead to earth . At least you can work out if its a weak spark problem . Mike
__________________
1940 cab 11 C8 1940 Morris-Commercial PU 1941 Morris-Commercial CS8 1940 Chev. 15cwt GS Van ( Aust.) 1942-45 Jeep salad |
#8
|
||||
|
||||
I'd bet on the coil. They did that quite regularly. Most people carried a spare coil.
__________________
1940 Cab 11 C8 Wireless with 1A2 box & 11 set 1940 Cab 11 C8 cab and chassis 1940 Cab 11 C15 with 2A1 & Motley mount & Lewis gun 1940 Cab 11 F15A w/ Chev rear ends 1941 Cab 12 F15A 1942-44 Cab 13 F15A x 5 1942 cab 13 F15A with 2B1 box 1943 cab 13 F15A with 2H1 box 1943 Cab 13 C8A HUP 1944 Cab 13 C15A with 2C1 box 1943 Cletrac M2 High Speed Tractor MkII Bren gun carrier chassis x 2 |
#9
|
||||
|
||||
No one has mentioned the condenser, they can give similar symptoms when they break down.
__________________
Richard 1943 Bedford QLD lorry - 1941 BSA WM20 m/cycle - 1943 Daimler Scout Car Mk2 Member of MVT, IMPS, MVG of NSW, KVE and AMVCS KVE President & KVE News Editor |
#10
|
||||
|
||||
Thanks all for the tips!
Other options:
Hanno
__________________
Regards, Hanno -------------------------- |
#11
|
||||
|
||||
Quote:
Hanno
__________________
Regards, Hanno -------------------------- |
#12
|
||||
|
||||
Quote:
A sure sign of a condenser failing is burnt points. They often fail when run for a certain time, then after cooling will run again. A common fault. Also check your coil is connected the correct way around. Richard
__________________
Richard 1943 Bedford QLD lorry - 1941 BSA WM20 m/cycle - 1943 Daimler Scout Car Mk2 Member of MVT, IMPS, MVG of NSW, KVE and AMVCS KVE President & KVE News Editor |
#13
|
|||
|
|||
If you have to change the polarity of the coil:
I can advise that there was a thread on the Fordbarn forum where "Bubba" (Jim Linder)(a flathead dizzy specialist in the states, with the credentials) says the coil can loose 80% of it's original output capability, if it has its polarity reversed in service.
__________________
Bluebell Carrier Armoured O.P. No1 Mk3 W. T84991 Carrier Bren No2.Mk.I. NewZealand Railways. NZR.6. Dodge WC55. 37mm Gun Motor Carriage M6 Jeep Mb #135668 So many questions.... |
#14
|
||||
|
||||
Coils
I should clarify, ensure the coil suits the polarity of the vehicle, there are both Negative Earth and Positive Earth coils, then ensure they are wired correctly. As has been said, the wiring reversed will reduce the output of the spark and not only that but the spark is reversed, this can cause problems in the distributor cap too.
Firstly I would go for the condenser, they fail more regularly than coils. regards, Richard
__________________
Richard 1943 Bedford QLD lorry - 1941 BSA WM20 m/cycle - 1943 Daimler Scout Car Mk2 Member of MVT, IMPS, MVG of NSW, KVE and AMVCS KVE President & KVE News Editor |
#15
|
||||
|
||||
Quote:
__________________
One of the original Australian CMP hunters. |
#16
|
||||
|
||||
Quote:
__________________
Regards, Hanno -------------------------- |
#17
|
||||
|
||||
Quote:
H.
__________________
Regards, Hanno -------------------------- |
#18
|
|||
|
|||
Good advice Tony. 'Way to go' Hanno.
Hot Spark will be cheaper than Pertronix if they have a suitable kit. Pertronix have a larger range. Look at their web sites. David
__________________
Hell no! I'm not that old! |
#19
|
||||
|
||||
Yes it's the Pertronix kit Hanno. I bought mine a while ago but haven't got around to fitting it yet.
__________________
One of the original Australian CMP hunters. |
#20
|
||||
|
||||
Hi Hanno,
I had exactly this problem on a Fordson V8 WOT 2 a while ago ! Changed the condensor and cured the problem. Cheers, Andy
__________________
Andy Mitchell Ford F30 LAAT W & P Arena Daimler Heavy Mk 1 to restore |
#21
|
|||
|
|||
Hi Hanno.
Is the power loss accompanied by misfiring and maybe bangs in the exhaust, or does it just seem that you're driving with the brakes on? Rhett. :-) |
#22
|
|||
|
|||
Good question
Quote:
Hi Hanno Rhett asks a very good question, dose it feel sound etc like the engine is getting tight or purely a doesn't want to run issue. Example does it still spin over on the starter and cold start speed? Does the temp gauge show normal temp when this happens? Will be very interested to hear what the eventual solution to the problem is, or will it be one of those strange old vehicle maladies that problem goes away but you can't put your finger on what was the cause or that it really ends up being several small things combining. Cheers Phil
__________________
Phil Waterman `41 C60L Pattern 12 `42 C60S Radio Pattern 13 `45 HUP http://canadianmilitarypattern.com/ New e-mail Philip@canadianmilitarypattern.com |
#23
|
|||
|
|||
If there isn't any misfiring, I would probably discount any ignition problems. From my experience, the flatheads are very susceptible to wear in the fuel pump mechanism i.e. camshaft lobe, pushrod and pump rocker arm etc. Also, a likely contender is the pump diaphragm which might be damaged by this ethanol that's been foisted on us in recent times- I've had to renew the one in my 1936 Austin 7 recently, as the old one had literally crumbled to pieces! Plus I have two motorcycles which I now can't use, as their GRP fuel tanks have gone soft and leak like sieves. Arrrrgh!
Rhett :-) |
#24
|
||||
|
||||
Thanks for all the input, will get back on this later (currently suffering from the flu )
__________________
Regards, Hanno -------------------------- |
#25
|
|||
|
|||
Hope both feeling better
Hi Hanno
That's it the truck has the Flu, same symptoms tired lack of power. But kidding aside hope you and the truck are feeling better soon. Cheers Phil
__________________
Phil Waterman `41 C60L Pattern 12 `42 C60S Radio Pattern 13 `45 HUP http://canadianmilitarypattern.com/ New e-mail Philip@canadianmilitarypattern.com |
#26
|
||||
|
||||
Hi Phil,
Indeed my cough sounds like a bad misfire My local American car specialist did take the time to look up the modern equivalent of the condenser part (will list it later here), contrary to the FLAPS. It was not on stock but we be early next week. To be continued. Hanno
__________________
Regards, Hanno -------------------------- |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Ford heating (cold weather equipment) | Vic Eaton | The Softskin Forum | 21 | 16-03-23 15:29 |
Clues please as to what they are | Lynn Eades | The Gun Park | 3 | 10-08-14 03:24 |
Loss of a carrier owner | shaun | The Carrier Forum | 4 | 12-12-12 00:55 |
transmission problem | alleramilitaria | The Carrier Forum | 3 | 21-12-06 18:28 |
Electrical Problem | Stewart Loy | The Restoration Forum | 9 | 22-05-05 15:19 |