Engine light flashing

10

Asked by Sep 21, 2016 at 08:59 PM about the 2000 Chevrolet Silverado 2500

Question type: Maintenance & Repair

00 silverado engine light flashing.  Read codes
came up with 02 sensors . Before getting them
replaced the truck lost most power . Rough idling
and seemed to have a lot of back pressure like the
exhaust was being driven through water . Obvious
to me the cats must be clogged right ? So I
proceeded to cut both cats out and had straight
pipes installed . After doing so the problem went
away for approximately 2 hours and now engine
light flashing again however the truck has gained
all its power back and rough idling has gone away .
I'm confused please help !!

8 Answers

9,370

O2 may still be getting readings out of limits, This could be related to the same reason cats clogged with is running rich. I would b4 replacing o2's check the normal items like plugs & wires, Air filter, clean MAF with CRC MAF cleaner & throttle body and IACV, TPS with CRC Throttle body cleaner and will need new gaskets on the IACV & Throttle Body, Make sure there is not any arcing with plugs & wires Can us Dielectric grease between boot & plug and same on boot to coils. Be sure not to touch the MAF filaments wire they are easy to damage just spray them off. i would also see if those codes are set and can erase them.

1 out of 1 people think this is helpful.
9,370

Here below is a test for down stream o2 sensor testing which is the 2 past the cats.

1 out of 1 people think this is helpful.
9,370

http://troubleshootmyvehicle.com/gm/4.8L-5.3L-6.0/diagnosing-codes-P0141-P0161-page-1

1 out of 1 people think this is helpful.
9,370

Here is the upstream test page below, copy &past see if these test match for you truck.

1 out of 1 people think this is helpful.
9,370

http://troubleshootmyvehicle.com/gm/4.8L-5.3L-6.0L/P0135-P0155-diagnostic-tests-1

1 out of 1 people think this is helpful.
9,370

This site has many other test for most auto's so you can search it to find others too.

1 out of 1 people think this is helpful.
10

Thank you I will look into those sites

10

So figured out its not the coil or plug . We swapped cylinder one and 3 and got same result . Code still reads cylinder 1 misfire

Your Answer

Add photo

Related Questions

  • 2000 silverado 3/4 ton truck won't start 6 answers

    my plow truck almost turns over but won't I treated the fuel and added new but it still wont turn over

    2000 Chevrolet Silverado 2500 2 Dr LS Standard Cab LB

    -

    Maintenance & Repair

  • can the security be removed or bipassed, without spending more than its worth? 1 answer

    this truck starts then dies after 2 seconds, every time. ive tried reseting it several diffrent ways, replaced ignition switch with no probs, but it would do this start and die thing often for years...

    1999 Chevrolet Silverado 2500 2 Dr STD Standard Cab LB HD

    -

    Maintenance & Repair

  • Engine light flashes wend I'm driving 1 answer

    Engine light flashes wend driving

    2005 Chevrolet TrailBlazer LS

    -

    Maintenance & Repair

  • What does a flashing service engine light mean? 2 answers

    The car lurches as if the fuel filter is stopped up and the service engine light is flashing.

    1996 Chevrolet Corsica

    -

    Maintenance & Repair

  • engine light flashes 4 answers

    Check engine light flashes 5, 7, 9, 20, 30 times in a row. Its a pattern that continues. What does it mean.

    2003 Chevrolet S-10 2 Dr LS Standard Cab LB

    -

    Maintenance & Repair

Silverado 2500

Looking for a Used Silverado 2500 in your area?

CarGurus has 254 nationwide Silverado 2500 listings starting at $3,000.

ZIP:

Search Chevrolet Silverado 2500 Questions

Chevrolet Silverado 2500 Experts

#1 juniosex
juniosex
Reputation 480
#2 tankwalk
tankwalk
Reputation 420
#3 km2002
km2002
Reputation 340
View All

Related Models For Sale

Used Chevrolet Silverado 2500HD
424 Great Deals out of 29,178 listings starting at $2,998
Used Chevrolet Silverado 1500
2,546 Great Deals out of 147,463 listings starting at $2,000
Used Dodge Ram 2500
175 Great Deals out of 5,579 listings starting at $2,900
Used GMC Sierra 2500
3 Great Deals out of 184 listings starting at $6,990
Used Ford F-250 Super Duty
456 Great Deals out of 42,343 listings starting at $2,800
Used GMC Sierra 2500HD
119 Great Deals out of 13,694 listings starting at $1,500
Used Ford F-250
557 listings starting at $1,977
Used Ford F-150
3,363 Great Deals out of 205,065 listings starting at $1,273
Used GMC Sierra 1500
1,143 Great Deals out of 57,189 listings starting at $995
Used Chevrolet Silverado 1500HD
14 Great Deals out of 294 listings starting at $4,700
Used Chevrolet Silverado 3500
30 Great Deals out of 653 listings starting at $5,995
Used Dodge Ram 1500
570 Great Deals out of 12,811 listings starting at $1,295
Used Toyota Tundra
649 Great Deals out of 27,798 listings starting at $1,599
Used Chevrolet C/K 2500
255 listings starting at $3,599

Used Cars For Sale

2004 Chevrolet Silverado 2500 For Sale
3 Great Deals out of 110 listings starting at $4,500
2003 Chevrolet Silverado 2500 For Sale
23 listings starting at $6,872
2002 Chevrolet Silverado 2500 For Sale
14 listings starting at $3,000
2001 Chevrolet Silverado 2500 For Sale
19 listings starting at $8,995
2000 Chevrolet Silverado 2500 For Sale
62 listings starting at $5,900