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Gassy problem

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Old Jul 15, 2013 | 07:49 PM
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Default Gassy problem

No, I haven't been eating a lot of beans. My '96 with the 4.3 is giving me fits. It is dumping fuel into the #1 cylinder. Darn, I thought I had the coolant leak fixed and now I'm blowing raw gas out the tail pipe. I cleaned a little bit inside the injector assembly but didn't do much. I didn't want to cause myself problems later, which I now have anyway.

I'm car poor right now and have my eye on a sharp 2 door so I want to get this puppy running right so I can sell it. It ran fine before, it just puked coolant everywhere.
 
Old Jul 15, 2013 | 08:01 PM
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dry out cylinder and install a brand new spark plug ??
 
Old Jul 16, 2013 | 03:59 PM
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Originally Posted by rexazz2
dry out cylinder and install a brand new spark plug ??


I'm afraid all that will do is ruin another spark plug. The injector is flooding the cylinder. It's not lack of spark, it's a lot of gasoline going into the cylinder.
 
Old Jul 16, 2013 | 06:48 PM
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poppet valve may be stuck open? The truck only has 1 injector with 6 poppet valves unless it's been upgraded to the mpfi setup.
 
Old Jul 16, 2013 | 09:45 PM
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Kent Moore J 34730 230 Poppet Nozzle Test Devices 6 Six New Testers | eBay

I bought the two sets that you see sold, got the first one the other day in the mail. Just bought the other one.

If you don't have the upgrade yet this should help you see what the heck is going on.

"'Cause
A deposit build-up on the CSFI poppet valve ball and/or seat may cause the poppet ball to stick open or closed. In either case, the specific cylinder will be mis-fueled, resulting in a cylinder mis-fire condition.
Correction
A new injector unsticking and cleaning process has proven to be effective in restoring poppet valves to an "as new" condition. CSFI injector replacement should NOT be considered as a correction for this customer concern.
Check the vehicle history to determine if the vehicle is returning for a second fuel system repair for this condition. If the fuel system has been repaired for this condition previously, then inform the customer that an alternate fix is available. A new MFI fuel system has been developed that will back service the CSFI fuel system. The MFI fuel system eliminates the CSFI poppet valve ball and seat. The CSFI fuel system will need to be replaced as a unit. Refer to Central SFI to MFI"

That's from a TSB.

I have seen guys remove the tube and push carb cleaner through it with a syringe while pulling the little valve open and closed with small needle nose.

That's just what I remember, you would really need to feel your way through it as you go.
 

Last edited by spittybays; Jul 16, 2013 at 10:03 PM.
Old Jul 17, 2013 | 06:29 PM
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By golly, that sounds like the issue. Where would I find the parts to do the conversion? The guy with the 2 door is getting antsy to sell. He's got his eye on another ride too.
 
Old Jul 17, 2013 | 07:58 PM
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Originally Posted by ol' grouch
I'm afraid all that will do is ruin another spark plug. The injector is flooding the cylinder. It's not lack of spark, it's a lot of gasoline going into the cylinder.
just saying that wet plug is trash
 
Old Jul 17, 2013 | 10:35 PM
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http://www.lindertech.com/docs/csfi_info.pdf

Mot sure what your trying to do sell trade or keep, but if your not going to keep it why not just a new injector. Rockauto has them starting at like 28 bucks.

http://www.summitracing.com/parts/ac...l/express-2500
 

Last edited by spittybays; Jul 18, 2013 at 08:39 AM.
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