running on 7 cylinders

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Dec 30, 2006 | 01:07 PM

usmcsamhouston

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Joined: Oct 2006

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running on 7 cylinders

okay, so my 84 z28 overheated earlier this week. the heater core hose had one of those flush/fill kits on it and it blew off. ever since then i can't get it to run right. I've checked for spark on all cylinders and they've all got spark. but when i pull the #3 plug wire the car doesn't show any change. i've replace the plug and the plug wire, but like i said i'm getting spark. what else should i check? thanks

Dec 30, 2006 | 01:14 PM

voodoochikin04

Junior Member

Joined: Dec 2006

Posts: 39

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From: nebraska

Car: 87 pontiac fiero

Engine: 2.5 liter

Transmission: 5speed

Axle/Gears: dont care.

same problem

hey i have the same problem.. my 83 trans am over heated last week and then it sounds like 7 cylinders, and when i unhook the #3 plug wire it doesnt sound any different..but im getting good spark on that plug, but mine also, makes a knocking noise.. plz help...

Dec 30, 2006 | 02:09 PM

DartByU

Senior Member

Joined: Mar 2001

Posts: 841

Likes: 3

From: Silverhill,Al

Car: 92 Camaro RS

Engine: 305 TBI

Transmission: T-5

Do a compression check. If that cly. is lower that the others then you have a bad valve or leaky piston.

Last edited by DartByU; Dec 30, 2006 at 02:12 PM.

Dec 30, 2006 | 05:20 PM

usmcsamhouston

Thread Starter

Junior Member

Joined: Oct 2006

Posts: 6

Likes: 0

alright thanks...I gotta run out and buy the compression checker.

damn, I was hoping for an easier fix...maybe click my heels together 3 times and say "there's nothing like a good running car, there's nothing like a good running car, etc."

alright thanks again and i shall report back tonight