LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

HELP! bad misfire on new plugs and Delteq!

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Old 03-21-2005, 05:21 PM
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Re: HELP! bad misfire on new plugs and Delteq!

i agreee locking bolts have a thingamabobber on em that stops them from backing out
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Old 03-21-2005, 05:47 PM
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Re: HELP! bad misfire on new plugs and Delteq!

hey injuneer, that was something i didn't really know. good advice! it's just that my engine has 142,000 on it, so i really tend to baby it a lot.
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Old 03-22-2005, 11:45 AM
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Unhappy Re: HELP! bad misfire on new plugs and Delteq!

Well, the car is pretty much undriveable at this point. Even a slight touch of the throttle will send the car into a bucking/stuttering frenzy. I'm grasping for ideas here - I had to drive the car 25 miles like that

misfiring is soooooooo bad on your engine (isn't it?)! i dont want to drive it like this anymore!

i don't see how anything could cause THIS bad of a misfire... besides the optispark
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Old 03-22-2005, 12:01 PM
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Re: HELP! bad misfire on new plugs and Delteq!

Have you checked for Opti-Spark trouble codes since it has started running this badly? Some trouble codes may have been set now.

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Old 03-22-2005, 01:36 PM
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Re: HELP! bad misfire on new plugs and Delteq!

Hey lane, If you want to bring it down to the southside I could take a look at it for you perhaps solve the problem.. If you think it will make it.
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Old 03-22-2005, 03:41 PM
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Re: HELP! bad misfire on new plugs and Delteq!

BUT I LUFF HER CRAIG!! *holds up 3 fingers*

i would bring it by but its literally NOT running ......

i have no clue what it is - im going to hook up a fuel pressure gauge to it tonight and see if that gets me anywhere...

how hard is it to swap a fuel pump?
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Old 03-22-2005, 03:57 PM
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Re: HELP! bad misfire on new plugs and Delteq!

oh yea, i got the codes scanned last night - all it says is one bank too lean and random multiple misfires code

could this mean optical sensor in the opti?
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Old 03-22-2005, 04:01 PM
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Re: HELP! bad misfire on new plugs and Delteq!

dude..its the wire i had the same problem..*ONE wire was cracked car ran like a bag of *******s. everything was arcing(you can see it at night). even the coil was..so i replaced it and that didnt do anything. i replaced that LIGHTLY CRACKED WIRE and BAM fixed. the inside of the wire is prolly shot..change it then see what happens
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Old 03-22-2005, 04:06 PM
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Re: HELP! bad misfire on new plugs and Delteq!

Originally Posted by pillagenburn
Well, the car is pretty much undriveable at this point. Even a slight touch of the throttle will send the car into a bucking/stuttering frenzy.
When mine did that it was because of a faulty O2 sensor.
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Old 03-22-2005, 04:09 PM
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Re: HELP! bad misfire on new plugs and Delteq!

oh yeah that too change the plugwire first!
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Old 03-22-2005, 04:15 PM
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Re: HELP! bad misfire on new plugs and Delteq!

A faulty o2 sensor wont cause the car to buck when its cold. Open loop should run just fine.

One plug wire wont cause the car to run so bad that its undrivable. Ive seen crossed plugs that are drivable.

Get it on a scanner to see what the codes are reading.

Just buy 1" header bolts and blue locktite them. Along wiht a good header gasket (FEL-1406), that will put an end to all your problems.

Check your fuel pressure too.
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Old 03-22-2005, 04:17 PM
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Re: HELP! bad misfire on new plugs and Delteq!

Originally Posted by disco192
One plug wire wont cause the car to run so bad that its undrivable. Ive seen crossed plugs that are drivable.


wanna make a bet?
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Old 03-22-2005, 04:21 PM
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Re: HELP! bad misfire on new plugs and Delteq!

Unless its the coil wire or there are other problems... i find it hard to believe.
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Old 03-22-2005, 04:26 PM
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Re: HELP! bad misfire on new plugs and Delteq!

Originally Posted by disco192
A faulty o2 sensor wont cause the car to buck when its cold. Open loop should run just fine.
True, but i didnt see him say it ran bad in open loop, so i gave an experience i had.
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Old 03-22-2005, 04:31 PM
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Re: HELP! bad misfire on new plugs and Delteq!

i thought it was a coil wire..i bought 2 new coil wires..25$ each from gm..didnt fix ****..my number 8 plug wire was fried and my car started but as soon as i hit the gas it bucked sooo bad and ran like absolute ****...from one wire.
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