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 Re: Stumble / pop under load - GenI
[Re: conner]
#606408
05/24/05 06:17 PM
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Joined: May 2000
Posts: 6,132
Trail Leader
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Or a lean condition will cause a backfire......
You could try and read the O2 sensor with a volt meter under cruise. And yes check the ignition too. Make sure the mechanical advance s not sticking while you are at it.
Kevin Yes, but it will be lean at other speeds also. not just when under load in overdrive. Reading the O2 during the misfire will tell you nothing as when there is an ignition misfire, there is a rush of oxygen which will lead you to believe the engine was running lean. If its lean at other speeds then its still a good test! Low speeds under a high load are harder to burn, so it may be enough to make a generaly lean mixture lite late (burn slow) and cause a backfire. A peek at the O2 sensor will show if something is up, looking at the reading just before it goes into misfire should tell you if the sytem is not working right. Kevin
87 Turbo Intercooled Raider, roller cam, torsen rear diff, LSD front diff, lockup auto with modified converter, V6 brakes, low transfer case gears...
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Re: Stumble / pop under load - GenI
[Re: Kevin C]
#606409
05/24/05 06:21 PM
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Joined: Feb 2004
Posts: 10,238
Web Wheeler
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Don't forget the possibility of exhaust leaks.
Frank
'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum
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Re: Stumble / pop under load - GenI
[Re: conner]
#606410
05/25/05 02:40 AM
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Joined: Aug 2003
Posts: 35
OP
Getting the Wheeling Fever
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I took the coil off, cleaned it, checked the resitance for the primary, secondary, and then the ballast resistor, cleaned the distributor cap inside, and checked all of my connections. It appears to have helped! I only cruised 3 miles and it could be a situation where it farts more in the morning (it hates going to work as much as I do), but so far so good. Thanks for the help, gang, and hopefully it did the trick! <img src="/forums/images/graemlins/cheers.gif" alt="" />
'87 Raider - 2.6L Rebuilt by me, BSE installed.
Superwinch manual hubs. LSD, Squirters and bouncy seat added. Cobra CB w/ PA (PA coming soon). 31x10.5x15 Futura Dakota rubbers; Pro Comp Add-A-Leaf w/ Rancho RS500's in the rear, KYB's up front.
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