back firing through intake...
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Joined: Feb 2004
Posts: 66
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From: Dartmouth Ma
back firing through intake...
A week ago I was driving under normal driving conditions (cruise control set at 45), then suddenly the car started to buck. I turned off the cruise control and tried to explore the problem using the throttle and it would back fire at 25% or higher throttle. Today me and a friend were tinkering with it and reving it slightly and it started backfiring through the intake 
. So needless to say I turned it off right away and now I'm playing with the idea that the timing somehow skipped. Any and all imput is welcome and appreciated. My car is a 1992 lt1 with a brand new opti/plugs/wires. Is the opti adjustable like a regular distributor?
. So needless to say I turned it off right away and now I'm playing with the idea that the timing somehow skipped. Any and all imput is welcome and appreciated. My car is a 1992 lt1 with a brand new opti/plugs/wires. Is the opti adjustable like a regular distributor?
Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
No there is no adjustment in the opti. The only way that your timing could possibly get out is if the timing chain actually skipped a tooth. Possible but not likely if you were just cruising along at 45 MPH.
When my ignition control module went out it did a bunch of really stupid crap, fortunately it died while the car was idling and not while I was out somewhere.
When my ignition control module went out it did a bunch of really stupid crap, fortunately it died while the car was idling and not while I was out somewhere.
Safety Car
Joined: Jan 2001
Posts: 4,386
Likes: 689
From: Boise ID
For something quick to try, the next time it acts up, try unplugging the MAF and see if it gets better. I have had one go bad with similar symptoms (although it did not like to idle either) and throw no codes
Safety Car
Joined: Jan 2001
Posts: 4,386
Likes: 689
From: Boise ID
Originally Posted by Nathan Plemons
Actually you'll be pretty hard pressed to unplug the MAF since the 92 doesn't have one.
Was that not until 94 or something when they came back?
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