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| Glow Plug Codes and Limp Home Mode http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=70609 |
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| Author: | Hoosier CRD [ Sun Aug 26, 2012 12:14 pm ] |
| Post subject: | Glow Plug Codes and Limp Home Mode |
Well, Guys, I need some insight here from those more experienced than myself. I'm getting the glow plug codes, P1261, P1263, P1265 and P1267. PLUS, the tractor is in limp home mode, i.e. slowly accelerating but getting up to 40 MPH or so eventually. While the Check Engine Light was on, the tractor ran fine. I decided to go by O'Reilly's to read/write down and clear the codes. Now, the Check Engine Light is on and I am in Limp Home Mode. I'm posting to find out what is needed. Glow Plugs? Glow Plug Module? I did do a search and found several posts, but didn't find the limp home aspect too. Any insight is appreciated. Thanks in advance. Hoosier CRD |
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| Author: | Hoosier CRD [ Sun Aug 26, 2012 4:21 pm ] |
| Post subject: | Re: Glow Plug Codes and Limp Home Mode |
UPDATE #1: I think that I got the Limp Home mode issue solved. Previously, I tried to reset the ECM with a key off for about 15 seconds and then restart. This resulted in a no change. So, I went further. I disconnected the battery and left it sit a while, I don't know 30-45 minutes. Connected the cables, fired it up and took it for a drive. Voila! Runs like the proverbial striped-butt ape that I known it for. Now, I think that the glow plugs are toast though. No problem starting, just the CEL and codes as described earlier. Any thoughts on glow plugs? I'm gonna check the Bosch info that I have and see what turns up. What's this with ceramic or metal? Thanks for your insight. Hoosier CRD |
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| Author: | Hoosier CRD [ Sun Aug 26, 2012 6:39 pm ] |
| Post subject: | Re: Glow Plug Codes and Limp Home Mode |
UPDATE #2: Well, I think that I have figured it out. A BIG thank you to all on this forum who have contributed information in the past. I defined the DTCs with the list provided from gmctd. This list is found in the CRD Tech section. Determined that the glow plugs are suspect, if not bad. I initially learned how to reset the ECM through a previous conversation with Keith at GDE and also in reading past topics in a search. Given that it did not respond, at least the first time, to the key off/wait method, the second try was attempted by disconnecting the battery and letting it sit for a while; this did the trick. I tested the glow plugs via directions from Squeetos post in the CRD Tech Section. Voila! bad glow plugs. I will also replace the glow plugs via Squeetos post. So, I went from WTF this morning to Cyphered It! this afternoon with a little searching, reading and trial and error. I love this forum. Hoosier CRD |
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| Author: | bugnout [ Mon Aug 27, 2012 5:41 pm ] |
| Post subject: | Re: Glow Plug Codes and Limp Home Mode |
Love it when there is a happy ending. |
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| Author: | ATXKJ [ Mon Aug 27, 2012 8:37 pm ] |
| Post subject: | Re: Glow Plug Codes and Limp Home Mode |
Well - I don't remember anyone killing all four plugs at once, nor do I remember anyone going into a limp mode because of the glow plugs I'm thinking the Module is the first check but as you pull that check resistance on the plugs - good is <2 ohms - bad is commonly ~ 200+ |
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| Author: | Hoosier CRD [ Tue Aug 28, 2012 6:21 am ] |
| Post subject: | Re: Glow Plug Codes and Limp Home Mode |
ATXKJ wrote: Well - I don't remember anyone killing all four plugs at once, nor do I remember anyone going into a limp mode because of the glow plugs I'm thinking the Module is the first check but as you pull that check resistance on the plugs - good is <2 ohms - bad is commonly ~ 200+ Here are the ohm readings, from left to right on the realy plug (1 through 4?) #1: 48.0; #2: 107.0; #3: 5.7; #4: 94.0 Well, I guess here is where I should give some more information. I had a brief but bad experience that could have turned ugly but did not, thankfully. On Saturday, I decided it was time to fix the rattling exhaust system. It got this way when I replaced the crank position sensor recently. When I tightened the v-band clamp at the turbine housing outlet, apparently the exhaust had moved about 1/2" towards the framerail. Wedged a 2x4 between the muffler and frame, loosened the clamp, saw the exhaust move a bit and then re-tightened the clamp. All should be good. Removed wedged 2x4. As I was re-assembling the air filter ducting, specifically at the compressor inlet, I noticed that there was what looked like dirt on the compressor wheel. Oh, okay, let's spray it with some degreaser from work, it's called ID Red from Zep. Got it all put back together, fired up the engine so as to hear if the rattle had ceased at shutdown (from the bumping exhaust) and, OH MY SWEET MARY, upon start up or shortly thereafter, a second or five, the tractor decided to try and peg the tach! Guess the ID Red found it's way around to the intake, eh?! Anyways, my hand had not left the key during this startup so I immediately shut it down and all calmed down with out any more fanfare. With heart racing, and right hand shaking, I had to "get back on the horse" so to speak. Deep breath. Okay, start it again and see what happens. Fires up, idles fine, revs fine, took it to about 2,000 or so. Shut off, Re-start, all is good. Bump is gone too. Wait a minute, why is the check engine light on? Damnit! Well, I need another air filter anyways, so let's go to the Advance and we'll read the codes. Sure enough, all four glow plugs are throwing codes. I cleared the codes and drove home, no problem. Drove it to church Sunday morning, CEL is on again. No problem. This time, I'll go by O'Reilly's and see what's up. Same codes for the glow plugs. Cleared codes. Proceeded to cross the street to McD's for some large sweet teas. Go to drive home and it feels like I'm in 3rd gear. No acceleration to speak of but it will get to 40 MPH eventually so okay, I'll get it home and we'll see what's up. Try the key off, wait 15 seconds, start up. Tried it in the drive way, still the same. Maybe I did not wait long enough on the key off part. Post the problems, start searching around the forum, disconnect the battery for a bit, verify the codes on the list, tested with the ohm meter and so here we are. Hook up the battery, fire it up. CEL still there, no surprise. Idles fine, drove it, accelerates fine now. Whew. I can use it for work on Monday. Find the P/N on eBay for the glow plug and relay kit from Mother Mopar. Called my Parts Manager buddy and he'll have them there on Tuesday along with the mack-daddy 3.7 Liter towing fan that I ordered (seperate issue) Monday has come and gone. Drove it 200 miles for the job. Started, stopped, drove it on the highway, no issues except for the CEL. I will go and check the glow plugs again with it totally cold and see what it reads. I honestly can't think of what else would have killed them if not for the ID Red Moral of the story: if you use some sort of degreaser on the comp wheel, as I have done in the past, make sure that you take the hose off of the compressor housing outlet and soak up at least some of the degreaser with a paper towel or something. This is the part that I DID NOT do this time. FWIW, Hoosier CRD |
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