My 1990 chevy silverado starts running rough when it warms up it has the 5.7 ltr non hei inition

I put a new ignition control module in and a new coil then it started running really rough after it warms up and is very hard to startwhen I put it in gear it wants to die

5 Related Answers

Colin Stickland

22516 Answers
Posted on Nov 04, 2008

SOURCE: 98 chevy 1500 loses power

sounds like an ECU fault.one of the chips is breaking down when the units warms up

Eric

18 Answers
Posted on Apr 01, 2009

SOURCE: Hi I have a 1992 silverado with a 350,hard to start.

When it runs really rough is there alot of black smoke? Could be the fuel pressure regulator diaphram, real easy to change on that TBI...

Anonymous

14 Answers
Posted on May 03, 2009

SOURCE: 1998 chvy 1500 loses power

check the intake gaskets. in the middle front and middle rear. If they are oily, it more than likely sucked part of the gasket in. When it warms up the leak gets bigger. The easy way to check is to get some carb cleaner and spray all around the intake while idling and warm. DO NOT SPRAY ANY EXHAUST PARTS , carb cleaner is combustible. The truck should stumble or even shut off when spraying with the carb cleaner if there is a leak.

Anonymous

1 Answer
Posted on Jun 25, 2009

SOURCE: 1990 Chevy Silverado Pick-up. No spark from the plugs.

How about the MAP SENSOR? Do you check it out?

Freddy

1311 Answers
Posted on Sep 11, 2010

SOURCE: 2004 CHEVY TRAILBLAZER 4.2 LTR CHANGED PLUGS, COIL

Throttle body needs to be cleaned.

Add Your Answer

Upload

Upload an image from your computer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

Loading...

Include an image. It's worth a thousand words.

prev next

Related Questions:

0helpful

1answer

1998 chevy astro van. scanner read multiple misfires when eng started running rough. checked coil ohms and two of the three readings were off so replaced the original coil and ignition control module....

Hi try to disconnect the airflow sensor or check for a low fuel pump pressure...

Read full answer

Aug 19, 2013 • 1998 Chevrolet Astro Van

0helpful

1answer

How to replace gmc1990 pickup coil

I assume this is the HEI coil. If not let me know and I can help further.
Instructions

- 1 Put your safety first. Engage your emergency or parking brake. Also, disconnect the negative battery cable from the Chevy Corvette's battery.
- 2 Make the ignition system visible. On older models, you may need to remove the plenum extension for the intake manifold using a screwdriver or wrench. For newer models, remove the cover for the fuel rail.
- 3 Look for additional parts that you need to remove. For HEI systems, you need to access the distributor through the cap. Other systems use an ignition coil harness connector.
- 4 Disconnect the secondary wires, or spark plug wires, from the ignition coil. Tag each wire with masking tape, so you know which terminal to reconnect the wire to. If you connect the wrong wires to the terminals, your Chevy Corvette won't start.
- 5 Detach the ignition coil mounting bolts and remove the ignition coil. The amount and type of bolts vary depending on the part number for the Corvette ignition coil. You may also need to remove the ignition coil arc seal.
- 6 Clean the distributor cap with a soft cloth. Now is a good time to replace the seal, if needed. Insert your new ignition coil and secure it in place. As you reassemble, use a Torque wrench to tighten the mounting bolts or screws to 13 inch pounds (1.5 Nm) of torque.
- 7 Reassemble the rest of the parts and reconnect your battery. Start the Chevy Corvette to ensure the repair worked.

Read full answer

Oct 18, 2012 • 1990 GMC Sierra

1helpful

1answer

Ihave 1990 chevy silverado 1500 350 mototor i have no spark i put on new coil and new ignition coil rotor cap

change the ignition module in the distributor.

Read full answer

May 06, 2010 • 1990 Chevrolet K1500

0helpful

1answer

What wires do we have to run to make a chevy 327 start and run with a points distrubitor .

This should be simple, run one wire from a switch on hot thru a ballast resistor(available from NAPA for about 15 dollars) to the Positive side of the ignition coil. Make sure this wire stays hot while the engine is turning over, if this is in a 85 truck use the wire that hooked to the origional distributor. Then run a wire from the negative side of the coil to the points, thats all there is to it. Just curious as to why you are using points instead of the HEI distributor that came in the truck. You only need to change the module from the 5 pin module to the 4 pin module, and this will eliminate the computer control in the ignition system.

Read full answer

Mar 28, 2010 • 1985 Chevrolet Chevy

2helpful

2answers

88 CHEVY PICKUP SILVERADO STOPS RUNNING IS JUST WARM

Replace the ignition module.

Read full answer

Mar 20, 2010 • 1988 Chevrolet Silverado 2500

0helpful

1answer

Chevy caprice doesn't start. Turns over but, no start.

Check spark. Is this one of those with the HEI coil on top of distributor? Check the ignition module in the distributor under the cap and rotor.

Read full answer

Nov 12, 2009 • 1990 Chevrolet Caprice

3helpful

2answers

1990 Chevy Scottsdale 1500 wont idle when first starting cold

ICM idle control module, loc throttle body, it may be dirty, remove clean or replace, its easy..

Read full answer

Jul 29, 2009 • 1999 Chevrolet Silverado 1500

1helpful

3answers

1990 Chevy Silverado Pick-up. No spark from the plugs.

How about the MAP SENSOR? Do you check it out?

Read full answer

Jun 12, 2009 • 1991 Chevrolet Silverado 2500

0helpful

3answers

1990 Jeep YJ 6 cyc. Won't Start---No Spark From Coil

It would be great if you could find the Ignition Control Module!!! From my experience on my Jeep...90 YJ 4.2 liter carb. it does not have one...Computer controlled only...

Read full answer

May 17, 2009 • 1990 Jeep Wrangler

Not finding what you are looking for?

View Most Popular

1990 K1500

Cars & Trucks

1998 chevy astro van. scanner read multiple misfires when eng started running rough. checked coil ohms and two of the three readings were off so replaced the original coil and ignition control module....

1998 Chevrolet Astro Van

64 views

Ask a Question

Usually answered in minutes!

Check Out the Latest Top Trucks Report!

View all Fixya Reports

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Have a manual for 1990 Chevrolet K1500? Or just drag it here!

Related Topics:

My 1990 chevy silverado starts running rough when it warms up it has the 5.7 ltr non hei inition