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TA runs like crap after first spring start up #1609513
04/19/14 06:18 PM
04/19/14 06:18 PM
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Mississauga, Canada
KARLN Offline OP
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hey guys,
finally started the T/A after winter storage. She started quickly but stalls as soon as I put in drive. Seems to idle okay but reving the engine makes it sputter. I'm guessing water in the gas tank?
I did use stabilizer before storage but this was a brutally cold winter. Any suggestions?

Also what plug would you recommend if the engine has been modified with a stroker kit? Should the plug be a hotter or colder range from stock?


B5 Challenger T/A
Re: TA runs like crap after first spring start up [Re: KARLN] #1609514
04/19/14 06:29 PM
04/19/14 06:29 PM
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Lincoln Nebraska
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RapidRobert Offline
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check that the AP is providing a good/immediate squirt. Might need to flush the gas. I'd go with maybe 1 heat range colder. Alot depends on the CR (how much heat the plug will see)


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Re: TA runs like crap after first spring start up [Re: RapidRobert] #1609515
04/19/14 06:42 PM
04/19/14 06:42 PM
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Mississauga, Canada
KARLN Offline OP
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current plug is RN12YC so I should I try RN10YC?


B5 Challenger T/A
Re: TA runs like crap after first spring start up [Re: KARLN] #1609516
04/19/14 06:46 PM
04/19/14 06:46 PM
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I'd stay where you are at, 10 would likely be too cold. 12 is very close. I'd get it going & monitor the plugs. what is your SCR? What is making you think you need to might need to change heat ranges? EDIT meant to say 1 range colder than what was in the heads OE which might have been a 13 or 14 rather than 1 range colder than what you have now especially since I did not know what you have in there. unless it's a killer motor 12 is very very close

Last edited by RapidRobert; 04/19/14 06:52 PM.

live every 24 hour block of time like it's your last day on earth
Re: TA runs like crap after first spring start up [Re: RapidRobert] #1609517
04/19/14 07:02 PM
04/19/14 07:02 PM
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Mississauga, Canada
KARLN Offline OP
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just removed a plug and it's black! Going to clean off the plugs and start the engine again to see if it solves the issue. I asked the machine shop to keep the compressor as close to stock as possible. They calculated it around 10:5.


B5 Challenger T/A
Re: TA runs like crap after first spring start up [Re: KARLN] #1609518
04/19/14 07:06 PM
04/19/14 07:06 PM
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So Cal
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Quote:

current plug is RN12YC so I should I try RN10YC?




I ran Champion 12's in my mild 419 stroker. Seemed good when fresh. But the plugs didn't seem to last and idle quality deminished. I fart around town a bit. I switched to Autolites, 3924 (e-brock heads take peanut plugs) and they last much longer and idle a little better.

I tried one hotter Autolites, 3926 (like Champ -14's), and they seem to be ok. Maybe little worse idle. I watch the position of the color change on the electrode tip. Supposed to be in the middle of the bend.

I think I'll go back to 3924's next time (next year).

Last edited by autoxcuda; 04/19/14 07:12 PM.
Re: TA runs like crap after first spring start up [Re: KARLN] #1609519
04/19/14 07:06 PM
04/19/14 07:06 PM
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Florida
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Old gas remaining in the carbs may have gummed them up a bit. But either way, it wouldn't hurt to disassemble the carbs and squirt carb cleaner through all of the passages, including air bleeds. Gaskets could have shrunk also from dryness and/or temperature swings. If they look ok, perhaps retightening everything with the same gaskets, base as well, could help seal any possible air/fuel leaks. Otherwise, replace them and see if that helps.

Check diaphragms while your at it.

As mentioned, going a bit colder on plugs is a good idea. OEM 340 high compression plugs were N9Y.

Last edited by Locomotion; 04/19/14 07:08 PM.
Re: TA runs like crap after first spring start up [Re: KARLN] #1609520
04/19/14 07:53 PM
04/19/14 07:53 PM
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Quote:

just removed a plug and it's black!


That might explain the sputtering if they are fouled enough & it sounds like they are. Likely from all the pedal pumping. On the heat range you wanna warm it up on the highway then pull over & swap a plug on your hottest cyl (or any cyl) then get back on the highway & drive with minimal AP use then cut the ign & coast to the side of the road & pull the plug. k.i.s.s. With a true 10.5 I think 12 you have now or 11's maybe would work good.


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Re: TA runs like crap after first spring start up [Re: Locomotion] #1609521
04/19/14 07:54 PM
04/19/14 07:54 PM
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Mississauga, Canada
KARLN Offline OP
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N9Y? I thought the stock plug was RN12Y? I should probably go a range colder.


B5 Challenger T/A
Re: TA runs like crap after first spring start up [Re: KARLN] #1609522
04/19/14 08:44 PM
04/19/14 08:44 PM
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Florida
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Quote:

N9Y? I thought the stock plug was RN12Y? I should probably go a range colder.




Champion had N9Y listed for the high compression 340's through '71 and went to N12Y for the low compression versions. Not sure when they started the R-resistor and C- copper designations.

FWIW, I recall N10Y being recommended for 426 Hemi's and I used N7Y in my high compression small block bracket motors when they were available.

Re: TA runs like crap after first spring start up [Re: KARLN] #1609523
04/19/14 09:11 PM
04/19/14 09:11 PM
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Karln, what octane gas do you run in it?

I think 9's might be too cold with modern pump gas (90-92 octane) and just cruising around town with the car.

But...need to read you plugs when you get the car running right and see what works for your particular setup.

Re: TA runs like crap after first spring start up [Re: autoxcuda] #1609524
04/19/14 09:17 PM
04/19/14 09:17 PM
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Mississauga, Canada
KARLN Offline OP
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using 94 with octane boost. I think it's water in the fuel or carb issues that are causing my problem. I just cleaned the plugs and restarted and the engine is running rough and seems to flood at idle unless I keep the revs up. I hope I don't have to drain all the fuel and refill, I have almost a full tank.


B5 Challenger T/A
Re: TA runs like crap after first spring start up [Re: KARLN] #1609525
04/19/14 09:27 PM
04/19/14 09:27 PM
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Lincoln Nebraska
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Hook a can of fresh gas to the fuel pump inlet & run that thru it & see if that straightens it out. Just me I would take off the carb top & see what you see. I like to lube bowl screws and spray the carb top gasket with WD40


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Re: TA runs like crap after first spring start up [Re: KARLN] #1609526
04/19/14 09:28 PM
04/19/14 09:28 PM
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Ontario,Canada
brads70 Offline
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Noticing your location I suggest Shell premium fuel as it contains no ethanol . Sunoco 94 (junk!)is full of ethanol. Sounds like you have a stuck float perhaps?

Re: TA runs like crap after first spring start up [Re: brads70] #1609527
04/19/14 09:36 PM
04/19/14 09:36 PM
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Harrisburg, Pa.
screamindriver Offline
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I usually mix up some stabil{or better yet startron} and dry-gas in a can of fuel and dump it in on top of the bad gas...No way to tell which gas powered item did'nt make it through the winter until that first run...Even with the stabilizer{sta-bil} in it some won't make it... On a side noter I have a boat that sat 2 years with Startron in it and it fired right up like it was used yesterday.. STAR-TRON

Re: TA runs like crap after first spring start up [Re: brads70] #1609528
04/19/14 09:37 PM
04/19/14 09:37 PM
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Quote:

Noticing your location I suggest Shell premium fuel as it contains no ethanol . Sunoco 94 (junk!)is full of ethanol. Sounds like you have a stuck float perhaps?




I think it's carb or ignition related granted you kept the tank full and added stabilizer over just one winter.

Can you idle the car a little while looking down the carbs? Wonder if one of the carbs is dumping fuel.

Re: TA runs like crap after first spring start up [Re: screamindriver] #1609529
04/19/14 09:45 PM
04/19/14 09:45 PM
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Quote:

Even with the stabilizer in it some won't make it.


I worked on this womans lawnmower one spring & it would start for a split second then die. After several repeats of that I drained the little bowl (it looked like brown tea)& poured fresh gas in the tank & fired right up. Granted it was not treated with Stabil or anything else but I was amazed that the gas went bad just over the winter (3 or 4 months). Not sure if it was E10 or not as both is available here & she or the lawnmower repair shop had filled it prior to it sitting in the garage for the winter


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Re: TA runs like crap after first spring start up [Re: RapidRobert] #1609530
04/19/14 10:12 PM
04/19/14 10:12 PM
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Mississauga, Canada
KARLN Offline OP
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it was filled with Shell premium before storage as I heard the same about it not containing ethanol. I'm going to have my dad help me tomorrow and look down the carb to see what's happening. Ignition system is new so I doubt if it's ignition related. Plus it ran fine when I put her away for the winter.


B5 Challenger T/A
Re: TA runs like crap after first spring start up [Re: KARLN] #1609531
04/20/14 04:42 PM
04/20/14 04:42 PM
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Mississauga, Canada
KARLN Offline OP
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quick update. Looked down the center carb and spray seems to be good and atomized. Is there a procedure to adjust the choke and fast idle solenoid?
Could the fact that I've welded my heat riser in the full open position to give original appearance be contributing to this issue?


B5 Challenger T/A
Re: TA runs like crap after first spring start up [Re: KARLN] #1609532
04/21/14 04:41 PM
04/21/14 04:41 PM
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Cincinnati, Ohio
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Quote:

hey guys,
finally started the T/A after winter storage. She started quickly but stalls as soon as I put in drive. Seems to idle okay but reving the engine makes it sputter. I'm guessing water in the gas tank?
I did use stabilizer before storage but this was a brutally cold winter. Any suggestions?

Also what plug would you recommend if the engine has been modified with a stroker kit? Should the plug be a hotter or colder range from stock?




I'm betting it wasn't running very well when you parked it, even though you thought it was.

Water or condensation won't foul your plugs, tuneups do.

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