01' blazer OBDII error core P1637 ?

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01' blazer OBDII error core P1637 ? - 3/29/2007 9:23:44 AM    johnny_5 Posts: 16 Joined: 3/26/2007 Status: offline error code = P1637 i cleared it, and now it doesnt show up, but still not starting, turns over, just wont start. anyone know what this code means..?  appreciate the input, thanks in advance < Message edited by johnny_5 -- 3/29/2007 9:28:39 AM > _____________________________ 99'blazer 4.3L, LS 4x4 4 door 77,655ml. ..... & ..... 01' blazer 4.3l, LS 4x4 2 door 78,567ml. Post #: 1

RE: 01' blazer OBDII error core P1637 ? - 3/29/2007 9:39:11 AM    swartlkk Posts: 14308 Joined: 5/1/2005 From: Waterloo, NY Status: offline It seems to be a charging system error code...  here are a few descriptions: P1637      Generator-L-Terminal Circuit P1637      Generator Lamp Control Circuit P1637      Charging System Lamp Control Circuit Hopefully one of the guys with access to the dealership database can help you out with the diagnosis steps.  I don't have my reference material with me at work. _____________________________ Kyle- 2004 Rainier 1970 Chevelle - Resto 1974 K5 Blazer - Resto (in reply to johnny_5) Post #: 2

RE: 01' blazer OBDII error core P1637 ? - 3/29/2007 9:55:38 AM    johnny_5 Posts: 16 Joined: 3/26/2007 Status: offline yes thanks, kyle. i hope someone can help.  it was running fine, then just shut down, (while at idle, in my driveway)  < Message edited by johnny_5 -- 3/29/2007 9:57:01 AM > _____________________________ 99'blazer 4.3L, LS 4x4 4 door 77,655ml. ..... & ..... 01' blazer 4.3l, LS 4x4 2 door 78,567ml. (in reply to swartlkk) Post #: 3

RE: 01' blazer OBDII error core P1637 ? - 3/29/2007 11:06:18 AM    johnny_5 Posts: 16 Joined: 3/26/2007 Status: offline ok, i figured out part of the problem, coil wire kept it from starting, it was arching on the back end of the engine, i re-routed it, and she suddenly came to life(at the turn of the key) i re-checked for codes, none are showing up, and the lights are no longer flickering(earlier post)... now, how do i get the dist. cap off, to replace it..? anyone..? i may as well do the whole shot, its time anyway. _____________________________ 99'blazer 4.3L, LS 4x4 4 door 77,655ml. ..... & ..... 01' blazer 4.3l, LS 4x4 2 door 78,567ml. (in reply to johnny_5) Post #: 4

RE: 01' blazer OBDII error core P1637 ? - 3/29/2007 11:18:57 AM    swartlkk Posts: 14308 Joined: 5/1/2005 From: Waterloo, NY Status: offline The distributor cap has two torx bolts holding it down.  One at the front and one at the back of the distributor.  IIRC, it's a T15 bit that should allow removal.  One word of caution, the screws do not stay with the cap, they can be dropped and lost so be careful when installing the new cap. I currently have my intake off my truck right now so the distributor is sitting on my work bench.  I'll snap a pic of everything for ya if you want. _____________________________ Kyle- 2004 Rainier 1970 Chevelle - Resto 1974 K5 Blazer - Resto (in reply to johnny_5) Post #: 5

RE: 01' blazer OBDII error core P1637 ? - 3/29/2007 11:24:04 AM    johnny_5 Posts: 16 Joined: 3/26/2007 Status: offline thanks kyle, a pic. would be appreciated, is there a special lube required..? like a dilectic paste..?  thanks again _____________________________ 99'blazer 4.3L, LS 4x4 4 door 77,655ml. ..... & ..... 01' blazer 4.3l, LS 4x4 2 door 78,567ml. (in reply to swartlkk) Post #: 6

RE: 01' blazer OBDII error core P1637 ? - 3/31/2007 12:22:23 PM    johnny_5 Posts: 16 Joined: 3/26/2007 Status: offline ok, i changed all that, now it idles good, but once you take off, it cuts out, really bad, stop and put in park, smoothes right out.  put in gear, cuts out..am i missing something here..? _____________________________ 99'blazer 4.3L, LS 4x4 4 door 77,655ml. ..... & ..... 01' blazer 4.3l, LS 4x4 2 door 78,567ml. (in reply to johnny_5) Post #: 7

RE: 01' blazer OBDII error core P1637 ? - 3/31/2007 12:58:57 PM    johnny_5 Posts: 16 Joined: 3/26/2007 Status: offline ok, at 2000rpm, in park or neutral, it cuts out, can hear a rattle in the engine, any idea's..? < Message edited by johnny_5 -- 3/31/2007 1:00:35 PM > _____________________________ 99'blazer 4.3L, LS 4x4 4 door 77,655ml. ..... & ..... 01' blazer 4.3l, LS 4x4 2 door 78,567ml. (in reply to johnny_5) Post #: 8

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