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Unread 11-10-2011, 02:17 AM   #1
jeep670
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jeep cj8 sputtering

I have a 1982 cj8 an it just started to sputter i changed the plugs an was wondering if it could be the ignition module or a bad coil? Help please

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Unread 11-10-2011, 12:26 PM   #2
ejeeperguy
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The ign mod going bad will act like it is over heated and then awhile later it will work fine for awhile then act up again.For the price of a new coil can't hurt to try .autozone was about 25bcks.
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Unread 11-10-2011, 12:57 PM   #3
addicted2dunes
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Does it do it when it's hot, cold, or all the time? Fuel filter? Plugged jets in the carb?
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Unread 11-10-2011, 01:51 PM   #4
jeep670
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I just had the carb rebuilt so i know the sputtering can't be from the carb..an yeah it sputters all the time.
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Unread 11-10-2011, 02:28 PM   #5
addicted2dunes
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Fuel filter plugged?
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Unread 11-10-2011, 04:07 PM   #6
jeep670
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I replace the fuel filter already an it still sputters waiting for my ignition module an msd coil to come in the mail an hope it fixes the problem
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Unread 11-10-2011, 04:22 PM   #7
addicted2dunes
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I wonder if your timing got bumped a little bit, did you try to time it first?
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Unread 11-10-2011, 04:53 PM   #8
lucdog
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Welcome to the best Jeep spot on the internet, that being said, fill out your profile. You didn't tell us what carburetor you have. Have you asked the place/person who did the rebuild about this, what did they say? Do you trust them to do a good job? Did it sputter before the rebuild? How long has it been since it was rebuilt?

On edit, you said, "I just had the carb rebuilt so i know the sputtering can't be from the carb..an yeah it sputters all the time" Just because they rebuilt it, doesn't meen it was done correctly.


Bill
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1957 WILLYS pickup, needs work.
1973 J 4000,
1978 CJ7 DD.
1979 CJ7 360, TH400/Quadratrac trail Jeep.
1979 J20
1980 CJ5 trail Jeep.
1983 CJ7 pretty weekend and sometimes to work Driver in the summer, My first rebuild, if the Q-trac and 5 are broke, this one is the one to take. its just as capable as the other 2, except nice paint.
1984 Grand Wagoneer, 1 ton axles, great 360/727, and a big a$& tree fell on it .
1989 YJ the CJ to YJ conversion.
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Unread 11-10-2011, 05:09 PM   #9
Hurricane4
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X2 on what lucdog said. We need additional info on your Jeep.

BTW - I am experiencing a similar problem with my CJ7.
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Unread 11-10-2011, 05:44 PM   #10
jeep670
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I have a 1982 cj8 scrambler an with the original motor..i had the motor overhauled a few years ago.an i just rebuilt my stock carter carb a few weeks ago..it started to sputter before i got the carb overhauled an still sputters after it was overhauled..an changed the spark plugs an fuel filter too but made no difference..any suggestions?
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Unread 11-10-2011, 06:14 PM   #11
lucdog
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Quote:
Originally Posted by jeep670
I have a 1982 cj8 scrambler an with the original motor..i had the motor overhauled a few years ago.an i just rebuilt my stock carter carb a few weeks ago..it started to sputter before i got the carb overhauled an still sputters after it was overhauled..an changed the spark plugs an fuel filter too but made no difference..any suggestions?
Sorry, I still have more questions. When you say "all the time" does this meen at half throttle in any certain gear? Or just idleing?

This is what I want to here. Ok Lucdog, when I start it in the morning, my Jeep runs great. After it warms up for a couple minutes it starts to sputter/ and doesn't sound right. As I'm driving down the road, it doesn't seem like it wants to go/ or its runs great.
I haven't changed anything since the rebuild, just the spark plugs, and the carberator .

BTW, it still has all the pollution stuff.

Get the idea. I not trying to be a smart a$$. We Need more info.

Bill
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1957 WILLYS pickup, needs work.
1973 J 4000,
1978 CJ7 DD.
1979 CJ7 360, TH400/Quadratrac trail Jeep.
1979 J20
1980 CJ5 trail Jeep.
1983 CJ7 pretty weekend and sometimes to work Driver in the summer, My first rebuild, if the Q-trac and 5 are broke, this one is the one to take. its just as capable as the other 2, except nice paint.
1984 Grand Wagoneer, 1 ton axles, great 360/727, and a big a$& tree fell on it .
1989 YJ the CJ to YJ conversion.
2005 TJ Rubicon.
2011 Grand Cherokee Laredo 4x4, Mrs. LUCDOG's DD.
Lots of parts not for sale, i'm a hoarder.
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Unread 11-10-2011, 07:32 PM   #12
jeep670
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Okay..when i start the engine it sounds like its misfiring then once i get it going it would start to sputter an i would lose power ..when once the engine is really hot it would stop sputtering then once i pass 3000rpm it would start to sputter
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Unread 11-10-2011, 08:30 PM   #13
lucdog
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Quote:
Originally Posted by jeep670
Okay..when i start the engine it sounds like its misfiring then once i get it going it would start to sputter an i would lose power ..when once the engine is really hot it would stop sputtering then once i pass 3000rpm it would start to sputter


So it idles, just misses like its only hitting on 4 or 5 cylinders.

The first thing I would check is for vaccume leaks. I normally use a piece of hose to my ear and plug the other. With the engine running use the free end and check all the lines, the intake manifold where it meets the block, the charcoal canister, (by the firewall on the drivers side, looked like a coffee can) and around the carb. Listen for hissing or sucking air.

With the engine still running, and with a really well insulated pliers, a thick rubber glove would be good to. Rubber sole shoes and not touching the body also help from getting shocked. Pull off a plug wire at the plug, listen for any change in the engine. Do all 6 one at a time. They make a special tool for this, its not very expensive. Don't pull from the wire, pull from the boot.

With the engine off,
Back off the screws holding the distributor cap, (they don't come all the way out). Look inside the cap for black lines also check the silver or gold color terminals for corrosion.

A bad fuel pump, and corroded lines or pin holes in the line can also cause problems like this. A fuel pump needs to pump a given amount of gas in a given amount of time. The pump, to me is the most likley problem.

This is not something to just throw new parts at. $100 could easily be spent, and not solve the problem.

Everything I've written is free, except the fuel pump.

Bill
__________________
1957 WILLYS pickup, needs work.
1973 J 4000,
1978 CJ7 DD.
1979 CJ7 360, TH400/Quadratrac trail Jeep.
1979 J20
1980 CJ5 trail Jeep.
1983 CJ7 pretty weekend and sometimes to work Driver in the summer, My first rebuild, if the Q-trac and 5 are broke, this one is the one to take. its just as capable as the other 2, except nice paint.
1984 Grand Wagoneer, 1 ton axles, great 360/727, and a big a$& tree fell on it .
1989 YJ the CJ to YJ conversion.
2005 TJ Rubicon.
2011 Grand Cherokee Laredo 4x4, Mrs. LUCDOG's DD.
Lots of parts not for sale, i'm a hoarder.
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Unread 11-10-2011, 11:49 PM   #14
jeep670
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Thank you so much for your help..
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Unread 11-16-2011, 02:49 AM   #15
jeep670
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is it most likely that my fuel pump is really bad if its sputtering..it some times would stall or sputter really bad an it would lose power... i got a1982 cj8 with the the stock motor an headers..
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