Join Date: Feb 2007
Location: Quapaw, Ok.
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2000 7.3 missfire problems
I just bought this truck. It has a banks power pack system with ottomind chip, exhaust brake, transcommand, trans brake. It has a miss. Checked codes found p0232 p0470 p1210 p1212 p1249 p1316. Buzz tested good. But on cyl bal test failed 3 and 5. Replaced 3 and 5 injectors, and new harnesses and glow plugs. Seemed to run smoother but still a miss. Ran bal test again but failed 4 this time. Realized that cyl bal test is not the cylinders, never has on this truck.Just running test at idle. Thought this was strange since it kills them on my 96. Using a otc newer scanner. Also when doing a koeo self test it gives a bunch of injector high low circuit codes. When I ran the koer it had a p0470 code. I never heard it close the exhaust off. I am wondering if the banks brake is affecting this but I had the switch off for it. Also former owner said he replaced the IDM and also the glow plug relay. I removed the ottomind chip, cleared codes and drove, check engine light immediately. p1316, Run cyl bal test says 3 and 5 sometimes, 3 and 4 or just 4. Changed the oil and filter when first got truck. Only put 300 miles on it since. It is also hard starting when cold, has to be plugged in. But once warm will restart ok. Has died a few times on me too. replaced cps. had a 340 code. seems to be when fuel level is low in tank. Still died after cps, filled tank up not died since. It does for a little while when started first thing in the morning. But fires up ok throughout the day. Any suggestions? By the way this site rocks!!!!!!!. Thanks
Thanks for all your suggestions. I am sure my battery voltage is good. And I am working on getting another IDM to try. I just changed the oil, so I don't thinks is an issue. I borrowed a scanner again and when I checked codes this time it had p0238,p0478,p1212,p1316. I cleared codes and ran a koeo self test, passed it ok. Then I ran a buzz test, all buzzed but 5 is a little louder, no codes though. Then I started the truck up and ran a koer self test got a p0476 code. Then I ran a cyl bal test, code p0272 cyl 4 failure. Then I drove the truck for 15 min. came back and checked current codes p1316 was present. So I ran a cyl bal test again and got p0269 cyl 3 failure, and a p0275 cyl 5 failure. Next I ran a koer self test and got a p0476 code. Then I ran a cyl bal test 3 more times. All returned a p0269 cyl 3 failure. I shut the truck off and ran a buzz test, all buzzed again 5 was a little louder than the rest. But this time I got codes p1272 cyl 2 and p1277 cyl 7 high to low side open. Ran test again same thing. I then ran a koeoself test got p1272 and p1277 codes also. Hope this makes sense to someone, because I am not understanding this thing.Thanks for the Help.
Last edited by hudsonangus; 02-21-2007 at 10:34 AM.
Reason: needed to update a few things