Question about 1978 Chevrolet Caprice

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Chevy 350 engine

My 350 engine i have two cylinder misfireing 8 &5 .what the problem

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It could be something as simple as a very loose spark plug cap. When you pull the plug wire off, does it take some pressure or does it more so slide off?

Posted on Nov 17, 2012

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Was this engine apart?
If so, could be valve lash adjustment. too tight will cause predetonation, however a bad head gasket can be a culprit also. Do a compression check on both cylinders to determine. If your loosing coolant, good bet it's a head gasket. However, a cracked dizzy or carboned up cap can cause it also. I will tell you it's not a timing issue.
Dan

Posted on Apr 25, 2009

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SOURCE: chevy 350 5.7 ltr #8 cylinder misfire

I had same problems could be EGR valve

Posted on Nov 30, 2012

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Chevy 350 5.7 ltr #8 cylinder misfire


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Here is a website with the American Version of Chevy info


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http://boxwrench.net/specs/chevy_sb.htm


Great Stocking Stuffer for a Gearhead!
Small Block Chevy V8
267, 305, 327, 350, 400 cid.
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I need a diagram for firing pattern for a chevy 350 motor


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Firing Order:
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.......(back)........
|..8..............7..|
|..6..............5..|
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Distributor Connections:
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Rotation:
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Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at FixYa.com!

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1994 Chevrolet 5.7 liter V-8 VIN "K"

a3f5a7a.gif

Hope this help. (remember rated this post).

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1 Answer

Change plugs and wire and engine will not acclerate. This is a built 350 short block chevy with pro charger.


350 Chevy engine in what? 1990 Corvette? Who built it, did you?

Sounds as though you have plug wires wrong.
Firing order is 1-8-4-3-6-5-7-2

Distributor Ignition System:
Distributor rotates Clockwise. (Rotor)
Find Number 1 tower on distributor cap, go Clockwise with Firing Order.

Distributorless Ignition System:
VIEWING the engine from the Front of the car.

Spark plug wire connections along the back, starting from Left side going to Right side;
2-3-7-4

Spark plug wire connection towards the Front of the engine;
6-1-5-8

(To guess I would say you have 5 and 7 wires switched)

Left side cylinder order is 1-3-5-7, going from front to back.
Drivers side is Left side.
Right side cylinder order is 2-4-6-8, going from front to back.

Oct 13, 2009 | 1990 Chevrolet Corvette

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