Rough running D19
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=141344
Printed Date: 01 Jan 2026 at 12:03am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Rough running D19
Posted By: cnafarms
Subject: Rough running D19
Date Posted: 11 Aug 2017 at 5:45pm
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Have a D19. Was missing a little bit so changed plugs, wires, points, condenser, cap, rotor button and coil. Gaps on points and plugs are set to specs in operators manual. Starts right up and sounds good for about 10 minutes then starts missing and spurting again. So I'm guessing next step would be to clean the carb. Any suggestions from the experts on here. Thanks |
Replies:
Posted By: Rick
Date Posted: 11 Aug 2017 at 5:50pm
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Could have something to do with the gas part of it, but I wouldn't totally rule out the new condenser. Some are pure junk...Rick |
Posted By: cnafarms
Date Posted: 11 Aug 2017 at 5:57pm
| Well I'm not saying the points or condenser are or aren't junk. Went to Agco and got them. Made in the US so they aren't the cheap china junk. |
Posted By: orange-is-power
Date Posted: 11 Aug 2017 at 7:44pm
| If you pull the choke out slightly does it smooth out any? |
Posted By: cnafarms
Date Posted: 11 Aug 2017 at 7:50pm
| No the choke doesn't help it at all. Tried doing that just still missing and spurting. Checked the timing with a light seems to be perfectly or at least with my eyes in time |
Posted By: Gary Burnett
Date Posted: 11 Aug 2017 at 8:20pm
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Check the valves to make sure one of the intakes isn't too tight. |
Posted By: Gary Burnett
Date Posted: 11 Aug 2017 at 8:26pm
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Also check to see if the intake manifold is sealed to the head good.Spray a little ether where the manifold goes against the head when its running, if the engine speeds up there is a leak. |
Posted By: DSeries4
Date Posted: 11 Aug 2017 at 9:25pm
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I would start by going through the fuel system - clean out tank, sediment bowl, carb, gas line, then refill with FRESH gas from a station - not a barrel on the farm. ------------- '49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080 |
Posted By: DougS
Date Posted: 11 Aug 2017 at 10:00pm
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Sticky valve or valve set too tight. If it were fuel the problem would show up when the engine is cold and needs more fuel. It could be the coil, but I'd assume you took care of that when you changed the coil. Manifold gasket could be the problem, but again I'd assume the problem would be worse when the engine is cold and the metal hasn't expanded and tightened things up. One electrical thing you could check it the supply voltage to the coil. Check it when the engine is cold and again when hot. As Rick said, you could be dealing with another bad condenser. Replacing a bad part with a new defective part will make you scratch your heat.
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Posted By: jaybmiller
Date Posted: 12 Aug 2017 at 6:33am
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some things to do... remove gas tank cap and retest.... if it runs fine, cap is blocked causing a vacuum stopping gas from getting to carb shine LED light into tank, check for crud or bugs that semi-float then block the exit port remove sediment bowl screen, carefully clean and replace remove gasline at carb,put 2-5 gallon bucket under it, then open petcock and let gas flow out. should be a good solid flow.FILL the bucket ! A 20 second test ain't good enough. Let bucket sit for 2-3 hrs, ANY water in the bottom ? hmm 10 minutes.... will it restart immediatley or do you have to wait say 10-15 minutes ? if it restarts immediately that eliminates the new coil. but check for spark anyway. Unlikely a bad ballast resistor as they tend to 'open' when they die not 'self heal'. missing and sputtering does sound more 'gas' related than electrical. Jay ------------- 3 D-14s,A-C forklift, B-112 Kubota BX23S lil' TOOT( The Other Orange Tractor) Never burn your bridges, unless you can walk on water |
Posted By: Lonn
Date Posted: 12 Aug 2017 at 8:48am
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What number spark plugs are you running? I worked on a 706 gas once that acted like that. It had new plugs in it but it ran awful after a few minutes. Turns out that the Napa book says to use D21 plugs but the IH book called for the cooler D16 plugs. Slapped in D16s and the problem was solved. A D19 should use N5 Champion or equivalent. Some of the new cross reference books are wrong and say either N8 or N9. Those are the old numbers the new equivalent numbers are different. ------------- -- --- .... .- -- -- .- -.. / .-- .- ... / .- / -- ..- .-. -.. . .-. .. -. --. / -.-. .... .. .-.. -.. / .-. .- .--. .. ... - Wink I am a Russian Bot |
Posted By: DougS
Date Posted: 12 Aug 2017 at 9:13am
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I sincerely hope you aren't running Champions in it. |
Posted By: ACjack
Date Posted: 12 Aug 2017 at 9:53am
Can't say that Champion plugs are good or bad nowadays but, did you know that they were the factory plug during the 70's.
 |
DougS wrote:Posted By: cnafarms
Date Posted: 12 Aug 2017 at 9:58am
| They are the champion spark plugs N5 |
Posted By: Rick
Date Posted: 12 Aug 2017 at 11:03am
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I've found out that the D19's...all four of them that I have, run better on Champion plugs than any other plug out there. I use the N5C plugs all the time... |
Posted By: Don(MO)
Date Posted: 12 Aug 2017 at 11:31am
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Check the gas cap and the fuel pump, and run a compression test. ------------- 3 WD45's with power steering,G,D15 fork lift,D19, W-Speed Patrol, "A" Gleaner with a 330 corn head,"66" combine,roto-baler, and lots of Snap Coupler implements to make them work for their keep. |
Posted By: JC-WI
Date Posted: 12 Aug 2017 at 3:21pm
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I don't know about a D19, But I can tell you several true stories about
champions in WD's, D17 tractors and a few in chevrolet cars... and the stories are NOT favorable to the champion plug... and were replaced with A-C plugs ------------- He who says there is no evil has already deceived himself The truth is the truth, sugar coated or not. Trawler II says, "Remember that." |