installed a used engine in a 2006 chevy optra manual transmission and the engine light keeps coming on

Asked by Feb 18, 2013 at 12:12 AM about the 2006 Chevrolet Optra

Question type: Maintenance & Repair

my engine light comes on, sometimes it flashing, sometimes it a solid light. the diagnostic reading says
misfire on 2 and 4 cylinder, but it not. all the connections are in place but the engine light has not stayed
off since the engine was replaced. It also seem like i am burning more fuel when the engine light comes
on. can you help please?

8 Answers


A flashing "check engine" light is telling you to stop driving the car because you're damaging your catalytic converter! Sounds like it's misfiring under load. Did you replace the plugs & wires (or boots) when you got the engine? This needs to be done if the used engine has over 100,000 miles on it. If so, could be a bad coil pack(s). Or coil overs, whichever your car has. I'd recommend doing a complete tune-up first. HTH. -Jim

Best Answer

Replace the coil packs or pack and wired and plugs or boots it will fix it your cats will start glowing and stop up if u don't do it early and save them and fix your problem

1 of 1 people found this helpful.

i have changed the coil, plugs and wires, and the light still keeps coming on and flashing. what else can it be? does the computer need to be reprogrammed?


I'd check the wiring going to each fuel injector as well as the wiring for the spark plugs. Something may have gotten mixed up when you did the engine swap. If that checks out ok then you'll want to test those two fuel injectors. If the injectors are good run a compression test. If those two cylinders are low, there's the problem. I'm still leaning toward an ignition system problem though so check those items carefully. HTH. - Jim


Hi where did you find an engine for an Optra? Can you please help? In need of a Chevrolet Optra 2006 engine ASAP. Thanks

3 of 3 people found this helpful.

swap wires 1 and 4 and 2 and 3 that might solve it there is what is called a waist spark if you mix the wires the car will still run but missfire under load cause waist spark is week. cheers

1 of 1 people found this helpful.

p.s. that's if your compression is good


scratch that. swap the wires and check if the miss moves to the other cylinders if it does your coils are gone.

Your Answer

Add photo

Related Questions


Looking for a Used Optra in your area?

CarGurus has thousands of nationwide listings and the tools to find you a great deal.


Search Chevrolet Optra Questions

Chevrolet Optra Experts

#1 John Saffrahn
John Saffrahn
Reputation 530
#2 funboy
Reputation 340
#3 Tom Demyan
Tom Demyan
Reputation 320
View All

Related Models For Sale

Used Honda Civic
824 Great Deals out of 83,796 listings starting at $750
Used Dodge Caliber
68 Great Deals out of 2,329 listings starting at $750
Used Nissan Altima
1,268 Great Deals out of 74,640 listings starting at $1,000
Used Chevrolet Cobalt
66 Great Deals out of 3,797 listings starting at $500
Used Hyundai Accent
175 Great Deals out of 12,018 listings starting at $1,495
Used Toyota Corolla
948 Great Deals out of 68,803 listings starting at $1,800
Used Nissan Murano
404 Great Deals out of 24,921 listings starting at $1,499
Used Nissan Pathfinder
321 Great Deals out of 22,134 listings starting at $2,500
Used Ford Escape
1,282 Great Deals out of 84,013 listings starting at $995
Used Hyundai Elantra
628 Great Deals out of 41,698 listings starting at $900

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.