sevice engine soon light!!!!

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sevice engine soon light!!!! - 9/5/2008 9:46:15 AM    Blazin_1t_up   Posts: 222 Joined: 8/21/2008 From: Gastonia NC Status: offline ok i changed my exhaust a week or two ago and about two days after i was drivin from work and i work about 20 miles from home... and the ight aint on when u crank it  but about half way home it comes one did i burn up something?? _____________________________ _Blain_ 95 blazer 4.3 4x4 cold air and cherry bomb ... and a 4in lift in 2weeks two kc daylighters on the top an a push bar off a 89 Post #: 1

RE: sevice engine soon light!!!! - 9/5/2008 9:49:38 AM    2002XTREME   Posts: 799 Joined: 10/7/2007 From: Long Island Status: offline stock exhaust or custom made? Did you damage an o2 sensor in one of the pipes and didnt realize it? _____________________________ add ons: Volant cool air intake Extra set of back up lights new Ice Bear tires NHRA Race Stickers Stock BOSE radio w/cd Custom taillights Custom Frt turn signals Moon/Sun roof (in reply to Blazin_1t_up) Post #: 2

RE: sevice engine soon light!!!! - 9/5/2008 9:51:50 AM    Blazin_1t_up   Posts: 222 Joined: 8/21/2008 From: Gastonia NC Status: offline i put a cherry bomb on it... thats wat in thinkin but i have no clue where that would be at!! _____________________________ _Blain_ 95 blazer 4.3 4x4 cold air and cherry bomb ... and a 4in lift in 2weeks two kc daylighters on the top an a push bar off a 89 (in reply to 2002XTREME) Post #: 3

RE: sevice engine soon light!!!! - 9/5/2008 9:55:23 AM    2002XTREME   Posts: 799 Joined: 10/7/2007 From: Long Island Status: offline I could be wrong here but theres a chance the back pressure in the system changed and the sensors are sensing that.. triggering the SES light..what code are you getting with the light? Maybe if you can get that info Kyle is pretty good with the codes for these trucks.. _____________________________ add ons: Volant cool air intake Extra set of back up lights new Ice Bear tires NHRA Race Stickers Stock BOSE radio w/cd Custom taillights Custom Frt turn signals Moon/Sun roof (in reply to Blazin_1t_up) Post #: 4

RE: sevice engine soon light!!!! - 9/5/2008 9:56:31 AM    Blazin_1t_up   Posts: 222 Joined: 8/21/2008 From: Gastonia NC Status: offline ight ill find out wat code im gettin _____________________________ _Blain_ 95 blazer 4.3 4x4 cold air and cherry bomb ... and a 4in lift in 2weeks two kc daylighters on the top an a push bar off a 89 (in reply to 2002XTREME) Post #: 5

RE: sevice engine soon light!!!! - 9/5/2008 10:10:36 AM    djdrew010   Posts: 262 Joined: 4/2/2008 From: Canton, MI Status: offline or it could be something totally diferent. I would find what code it is before attempting to pin point the problem. _____________________________ 2001 Blazer LT 4x4 4 Door (in reply to Blazin_1t_up) Post #: 6

RE: sevice engine soon light!!!! - 9/5/2008 11:02:07 AM    Blazin_1t_up   Posts: 222 Joined: 8/21/2008 From: Gastonia NC Status: offline well how do u find thecode _____________________________ _Blain_ 95 blazer 4.3 4x4 cold air and cherry bomb ... and a 4in lift in 2weeks two kc daylighters on the top an a push bar off a 89 (in reply to djdrew010) Post #: 7

RE: sevice engine soon light!!!! - 9/5/2008 12:08:00 PM    rriddle3 Posts: 1313 Joined: 12/22/2006 From: Fort Worth,Texas Status: offline AutoZone or Advance Auto will read the codes for you for free. _____________________________ 2002 Blazer LS 4dr 2WD Auto Trans Hypertech PP III Programmed Flowmaster 50 Series Delta Flow Muffler, C6 Corvette Exhaust Tip TYC Elegante carbon fiber tail lights (in reply to Blazin_1t_up) Post #: 8

RE: sevice engine soon light!!!! - 9/5/2008 4:10:08 PM    swartlkk Posts: 14314 Joined: 5/1/2005 From: Waterloo, NY Status: online You may have a fun time getting the codes read.  If you have the OBD1 connector, then you may be able to do a simple paper clip trick and watch the check engine light.  It will blink out the code.  Refer to TroubleCodes.net for the code descriptions as well as a picture of what an OBD1 diagnostic port looks like.  As the link above suggests though, some 95 blazers may not be able to be checked with out the proper scan tool.  Most autoparts stores do not have the proper scan tool for checking these intermediary PCMs that were used in this year only. If you have the OBD2 diagnostic port, then good luck getting the codes read. The DLC is located under the driver side dash. Here is what an OBD2 DLC looks like: < Message edited by swartlkk -- 9/5/2008 4:14:03 PM > _____________________________ Kyle- 2004 Rainier 1970 Chevelle - Resto 1974 K5 Blazer - Resto (in reply to rriddle3) Post #: 9

RE: sevice engine soon light!!!! - 9/5/2008 10:15:09 PM    Blazin_1t_up   Posts: 222 Joined: 8/21/2008 From: Gastonia NC Status: offline obd1.....so its gonna be hard..... _____________________________ _Blain_ 95 blazer 4.3 4x4 cold air and cherry bomb ... and a 4in lift in 2weeks two kc daylighters on the top an a push bar off a 89 (in reply to swartlkk) Post #: 10

RE: sevice engine soon light!!!! - 9/6/2008 5:07:45 AM    Duntov   Posts: 194 Joined: 2/29/2008 Status: offline BLACK DEATH Get a handy little OBD 1 GM Code Reader and go by the instruction booklet that is included with it.  I bought mine at Amazon but I have only used it twice.   They cost about $25 and it plugs into to your OBD 1 port below the steering collum. Just like the paper-clip method, the GM Code Reader grounds  the appropriate terminal connections and starts the SES light flashing. At first, the SES light will give you one flash, a  pause and two flashes which is Code 12, meaning it is receiving data.  It will repeat Code 12 three times. Then comes the trouble codes. The SES light will flash the trouble codes three times also,  if the ECM has any trouble codes stored and apparently yours does..  If I was a bettin'''' man, I would place my money on the infamous OBD-1 Code 32 (three flashes - pause -  two flashes)  repeated three times. That means  the intake manifold EGR passages are stopped up with carbon which causes the EGR  valve to malfunction. Replacing the EGR valve may or may not solve that problem.   Most S/T-10 Blazers with more than 100,000 miles on the clock have that problem. You can ignore OBD-1 Code 32 if you wish because the SES light will go away when you turn off the igniton switch for 10 seconds or more. However, the  code or codes  are  stored in the ECM until the ignition switch is turned off a few times and then they are erased. Some experts say 50 times but I have never went back to check for Code 32  after my SES light quit coming on. My blazer has never thrown any other coes except Code 32.  The common  OBD-1 Code 32 SES light comes on after yu drive at a 60  or 70 MPH for three or four miles. That is caused by carbon build up in the EGR passages in the intake manifold. I cleaned mine out by getting on the open road (or freewway)  and driving at high speeds (at least above 80 MPH) for five or ten miles. I repeated the high speed procedure five times and have not seen a SES since.  The SES light will eventually quit coming on after you drive a high speed because you will  "blow the carbon out" as they say, which will allow the  EGR valve to function properly and it will stop sending malfunction signals to the ECM.  Driving a low speeds to work and back every day for a extended periods of time causes the carbon in the EGR passages to build up. Start using NAPA or Wal-Mart "High Milage"  motor oil, that helps reduce carbon build up after a few oil changes. Don''''t worry about using generic type  oil, because  all of it is made by the major oil companies and marketed under store brands. It should have API codes SJ, SH .  I use NAPA High Milage 10W-40 motor oil which is identical to Valvoline MaxLife motor oil.  I drive my Blazer at high speed occasionally  just to blow out the carbon and the "black smoke out the exhaust pipe" problem has been nearly eliminated.  < Message edited by Duntov -- 9/6/2008 5:29:25 AM > _____________________________ 1991 S10 Blazer 4-dr, auto., 4x4, 4.3L TBI Competely original. My Blazer even has 1991 air in the spare. Restored 1963 Pontiac Catalina Sport Coupe, Richmond ST-10 4-speed, 421 H.O., 370 HP tri-power, 3.64:1 Saf-T-Track, HD Police Option (in reply to Blazin_1t_up) Post #: 11

RE: sevice engine soon light!!!! - 9/6/2008 6:53:32 AM    swartlkk Posts: 14314 Joined: 5/1/2005 From: Waterloo, NY Status: online quote: ORIGINAL: Blazin_1t_up obd1.....so its gonna be hard..... All depends, try the paper clip trick between pins A & B (refer to illustration from Troublecodes.net).  If it does not work or you do not have both A & B in the DLC, then you possibly have the OBD1.5 PCM which is a royal pain to read codes from.  OBD2 scanners for the most part do not work and neither do OBD1 scanners. _____________________________ Kyle- 2004 Rainier 1970 Chevelle - Resto 1974 K5 Blazer - Resto (in reply to Blazin_1t_up) Post #: 12

RE: sevice engine soon light!!!! - 9/6/2008 10:04:05 PM    Blazin_1t_up   Posts: 222 Joined: 8/21/2008 From: Gastonia NC Status: offline i man i do use high mileage and i just changed the egr valve abt to months ago _____________________________ _Blain_ 95 blazer 4.3 4x4 cold air and cherry bomb ... and a 4in lift in 2weeks two kc daylighters on the top an a push bar off a 89 (in reply to Duntov) Post #: 13

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