Re: Trouble codes
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Rob |
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Last night I did a compression check on all 8 cylinders just trying to eliminate any possible mechanical problems. All cylinders were 215+ psi. Friday I will do a smoke test to make sure I don't have any vacuum leaks. If that checks well, I'll start digging into the wiring.... |
Re: Trouble codes
Did you ever take care of that metal-nub that you showed me the Manual pictures of?
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Load testing is very straight forward. I use a headlamp because you can SEE if the ground is poor, If the lamp is bright, the ground is good. If the lamp is yellow/brown or doesn't come on....the ground is poor. Test it straight to the battery first to get a feel on how bright & color the light is. The diagram should help, Hook one side of the Lamp to the positive side of the battery. With a suitable probe & lead hooked to the other side of the Lamp......Probe the ground circuit your testing, This will load that circuit. What I mean by "Suitable Probe" is Don't stretch out the terminal in the connector your probing. Or damage the plastic connector. |
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CB thank you for posting the "load test".... i will file this away for future use. as will others i am sure.
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Quick update guys. I messed around with the truck all weekend, with very little luck. Did a compression check, all cylinders 220 psi +/- 5. Did a smoke check, could not find any vacuum leaks. Stonewalled. Totally scratching my head.... I had set up an appt to get the exhaust put back on yesterday. I almost cancelled it since the truck would hardly run, but since I had taken the day off, I went ahead and called a rollback and had it hauled to the exhaust shop. I had planned on putting on some new Magnaflows that I had laying around, but they wouldn't fit, :(. I had wanted to switch the Magnaflows because I had read that they sound better with the LS motors, oh well....And with the new crossmember I built for the 6L80 tranny, my electric cutouts weren't working out so well either, :(. So I just told the exhaust guy to reconnect the Flowmasters that were on there (50 series) and at least I could do some tuning without getting fumigated. OK, so we get everything hooked up and I start the truck up just to see how it sounds....and to my surprise, I like it! And to my even bigger suprise, I hook the HPTuners scanner up and all the issues I was having with misfires and crazy Fuel Trims were gone!!!! Other than running a little rich, the idle is good and it's not throwing any codes. So the Moral of the story is, NEVER do any tuning on a FI motor unless you have the exhaust on and don't believe everything you read on the internet, :D. I'm eating some serious humble pie, I would never have thought that not having the exhaust on would have created the "symptoms" that I was seeing going on with my motor. Go figure. I did learn a lot through this experience, and will be a better "tuner" because of it. Now I have to undue some things I did when I was chasing a problem that wasn't there, :lol:.
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Interesting. I don't think I realized you were tuning running open headers? So lets see the exhaust!
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What cut out where you using? And why didn't you like them?
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yea I didn't realize you didn't have full exhaust either. I am guessing you were getting some air back in and causing the o2 sensors to freak out so to speak. Glad it is coming together much better now.
good luck Dave |
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When looking for a short that keeps blowing a new fuse, temp. wire a flasher can to the fuse posts, when it stops "clicking" and you have isolated the short, you have a good circuit, now replace the fuse
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Sweet!
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I'm still getting a couple of trouble codes but I think I might just need to delete them out. Here they are:
[] P057C - (SES) (Pending) (Old) (History) (Current) (Immature) [] P0621 - Generator L-Terminal Circuit (Pending) (History) (Current) (Immature) [] P0622 - Generator F-Terminal Circuit (Old) (History) (Current) (Immature) [] P2537 - Ignition Switch Accessory Position Circuit Low (Old) (History) (Current) (Immature) I'm running a 2 wire alternator off of a 2004 Chevy truck (140A). I had it checked and it checked out as "good". Any thoughts? |
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The p057c code came up as an SES for failed cruise control module. I'm guessing you might have something wired off the TCC/brake switch incorrectly (lol I know you and JorgenSC have gone back and forth on diagrams for this in the other thread). can't find anything on the p2537 |
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All I found so far, which I'm sure you have already found, was this:
OBD Code: System: Subsystem: P2537 Chevrolet – (ASE) Powertrain Vehicle Speed Control, Idle Controls, and Auxiliary Inputs |
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