LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Missfire??? Help

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Old 01-11-2009, 09:46 PM
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Default Missfire??? Help

Car was working fine just wanted to adjust the RR to 3/4 of a turn instead of 1/2 a turn. On that same day i fired it up and the car misfires CYL # 5,6 and 8. I rechecked Inj connections didnt take of any Plug wires. What in the HELL did i forget to connect or what could it be.
Old 01-12-2009, 09:49 AM
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What prompted you to change the preload? 1/2 turn should be fine, that's what I am running. Did it misfire immediately after readjusting the rockers, or later in the day? What codes are you getting?

A spontaneous misfire on three different cylinders happening after adjusting your rockers leads me to suspect your adjustment as the culprit. If it was just a random ignition problem, it would be either one cylinder misfiring or all.
Old 01-13-2009, 08:15 PM
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it started doing it as soon as i turned it on. I was already looking into buying a opti but it is fairly new and only has about 5000 miles on it GM. i say on opti because i had a similar problem and ended up being the opti. should i just try readjusting again!!!! getting kinda frustrated now feel like burning the car.
Old 01-13-2009, 08:19 PM
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Originally Posted by RaM AiR 97
it started doing it as soon as i turned it on. I was already looking into buying a opti but it is fairly new and only has about 5000 miles on it GM. i say on opti because i had a similar problem and ended up being the opti. should i just try readjusting again!!!! getting kinda frustrated now feel like burning the car.
Sounds like they are not adjusted properly to me. I would re-adjust them and be sure that you are following the correct procedure.
Old 01-13-2009, 08:20 PM
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any reason why all of a sudden you wanted to adjust them? are you sure you were on the base of the cam when you adjusted teh rockers?
Old 01-13-2009, 10:49 PM
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because i adjusted them at half a turn and decided to adjust at them at three quarters of a turn because at half a turn they sounded to loose.



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