Question about 1985 Chevrolet Corvette

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Which plug wire goes where on distributor

85 corvette 5.7

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  • craz4sara Jul 04, 2008

    thank you so much 5 minutes i had an answer!

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which plug wire goes where on distributor - 4bc53d4.jpg
Fig. 1: 5.7L (VIN 8) Engines Engine firing order: 1-8-4-3-6-5-7-2 Distributor rotation: clockwise

9dc3601.jpg
Fig. 2: 5.7L (VIN J) Engines Engine firing order: 1-8-4-3-6-5-7-2 Distributorless Ignition System

Hope this helps and have fun wrenching on that vette!!

Posted on Jul 04, 2008

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1 Answer

I have an 85 corvette with the problem of acceleration. It idles really good but it won't accelerate. It only pops and cracks. I put a hydrolic roller cam. Please help if anyone knows my problem.


It's possible that when you installed the roller cam, you didn't properly align the cam rotation with the crankshaft (off by one gear tooth); or when you reinstalled the distributor, the same error may have occurred. Check your ignition timing on No. 1 cylinder at Top Dead Center to see if the rotor is roughly aligned with No. 1 plug wire on distributor cap.

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1995 corvette stalls and hesitates at low speed, and when I hit the accelerator hard.


You could check and see if the cattalitic converter is clogged. My friend had the same problem with his 92 Corvett

Apr 19, 2013 | 1995 Chevrolet Corvette

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Change my spark plugs and distrubutor cap and the 85 ranger want start


You may have got the spark plug wires out of sequence.
Reseat the coil wire going to the center of the distributor cap Check the spark plug wires at the distributor against the firing order as follows:
The spark plug firing order is 1 - 4 - 2 - 5 - 3 - 6 The distributor rotor turns CLOCKWISE The engine cylinders / spark plugs are numbered :
firewall 3 - 6 2 - 5 1 - 4 front
Best wishes,
TF

Jun 03, 2011 | 1985 Ford Ranger

1 Answer

1985 5.7 corvette backfires when cold not as much at operating temp also wont idle , checked timming it is set wires are not cross replaced the module in the distributer


did you set timing properly ? you have to unplug the timing wire connector by the distributor its a tan and black wire with a black plug in it then set the timing at 6 degrees in park for a manual trans 6 degrees in drive with emergency brake on the firing order is 18436572 the left of the square power connector on the distributor cap is no 1 going to the left clockwise follow the wires to each plug carefully and make sure they are not mixed up it happens . driver side front is plug # 1 passenger front is plug # 2 driver side second from front is plug # 3 passenger side second from front is plug # 4 and so on also check the distributor cap and rotor for any signs of corrosion p.s. the # 6 and 8 wires are the ones usually mixed up after you set the timing the computer has to go through a re-learn mode for a few minutes so idle the car for a few minutes then drive it at about 20-30 percent throttle and let the trans shift into high gear for automatics manual same thing but shift it yourself after 5-10 minutes it should be fine

Aug 14, 2010 | 1984 Chevrolet Corvette

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Spark plug wiring diagram for a 1984 corvette 350


go to a library under autosec629-chilton n mitchell books

Jan 04, 2010 | 1984 Chevrolet Corvette

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

2 Answers

85 corvette wont start


I had the exact same problem with mine. After replacing nearly everything i took it to a shop today to learn that I had a bad wire on the back of the distributor and the new fuel pump i installed from autozone was faulty and not providing enough pressure.

Jan 11, 2009 | 1985 Chevrolet Corvette

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