Question about 1990 Chevrolet K1500

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Engine light 1990 chevy truck 350 wouldnt pass smog but was running good.new cat, spark plugs and wires with cap and rotor. now its running like **** and smells like a flooded engine and the engine light came on . checked the timming firing order and the connections every thing looks good . it idels ok but when i give it gas it stutters and feels bogged down. please help im clueless Thanks

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Short the test terminal, and read blinking engine light blinks, count them they will be fast and pause and be fast again each code is 2 digits long. This will help me to solve your problem. Thanks

Posted on Dec 27, 2008

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1 Answer

Does not pass smog at 25mph


IT FAILED AFTER THE CAT TOO?
NO RESPONSE
SO

POST THE FAILED REPORT
THERE IS NO HELPING ANYONE LACKING THAT.
CO =
HC=
NOX=
-----
IF PRESENT
CO2=
O2=

DATA MATTERS. BIG TIME.

WHY GUESS?
WHY GO BROKE DOING ALL THAT.?


The engine is running real bad.
this is a fact.
due failing with new cat.
so....
scan it yet
and print on all sensors readings?

or ask you mechanic to do that, he knows how.

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The Idle Air Control runs idle speed, it may be stuck or just bad. its located at the left rear corner of the throttle body, make sure its plugged in.

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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;
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(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.

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You either have a bad spark plug wire or coil pack. The light gray color on plug is normal.

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My 1990 chevy pickup just stopped running.


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3 Answers

1990 chevy 350 distributor wiring diagram and firing order


The firing order is 1-8-4-3-6-5-7-2.
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Good Luck

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