DieselJay Posted February 9, 2009 Share Posted February 9, 2009 I have a problem child that i am beating my head against. i havea 2001 f350 with a 7.3 that when cold it misfires and smokes. if you leave it in the shop where it is warm it is ok still has slight misfire. I have done manuel compression with 400 psi across the board, replaced all injectors due to having 2 out and customer wanted all replaced (ordered from pensacola diesel) ran fuel tests ok changed cam sensor even used oscilliscope and watched pattern from crank wheel ok Has had idm replaced within 6 months prior. check for any wiring chafes, no codes present except contribution codes #3 and #8, also went back in and replaced #3 and #8 again figuring bad injectors talked to hotline with them telling me to replace the injectors again still no change i am stuck!!!!!!!!!! Quote Link to comment Share on other sites More sharing options...
LARRY BRUDZYNSKI Posted February 9, 2009 Share Posted February 9, 2009 Bad pass thru on V/C or harnesses??? Quote Link to comment Share on other sites More sharing options...
DieselJay Posted February 9, 2009 Author Share Posted February 9, 2009 i have check and double check those also. Im ready to throw a wrench in each cyl and call it the day lol Quote Link to comment Share on other sites More sharing options...
BrunoWilimek Posted February 10, 2009 Share Posted February 10, 2009 Did you look at possible causes listed in PCED PPtest NA26? Quote Link to comment Share on other sites More sharing options...
hitechmech Posted February 10, 2009 Share Posted February 10, 2009 Do they pass an electrical buzz test? had one that had bad connection in the terminal at the main connector by air intake system. Replaced pins and all ok Quote Link to comment Share on other sites More sharing options...
Fredsvt Posted February 10, 2009 Share Posted February 10, 2009 If they were rebuilt injectors I'd not trust them for anything. Sorry Ford, been burned by your remans too. Our shop's been using Alliants exclusively and have not had smoking issues, only had one injector that just quit delivering fuel, took over 2 years before that happened though. Does it have a grey cam sensor, isn't there an issue with false contribution codes on some trucks with that sensor installed? Quote Link to comment Share on other sites More sharing options...
Damon Posted February 10, 2009 Share Posted February 10, 2009 You put the LL injector in the correct hole? Quote Link to comment Share on other sites More sharing options...
SteveS Posted March 16, 2009 Share Posted March 16, 2009 +1 on Alliants. Quote Link to comment Share on other sites More sharing options...
Gary_P Posted March 30, 2009 Share Posted March 30, 2009 I have a 2002 that has the same damn problem, smokes heavily and misses cold warms up and purrs like a kitten.....perdel pids indicate cylinder 2 & 4 with Positive readings, which to me means the performance loss is on those cylinders. letting it cool down and gonna retest it. Alliant Injectors you say?? Quote Link to comment Share on other sites More sharing options...
scott1984 Posted March 31, 2009 Share Posted March 31, 2009 what color is the smoke Quote Link to comment Share on other sites More sharing options...
Gary_P Posted March 31, 2009 Share Posted March 31, 2009 replaced #2 & #4 injectors fixed the contribution codes I was recieving, but still runs like shit cold and white/grey smoke heavy until warm Quote Link to comment Share on other sites More sharing options...
Bruce Amacker Posted April 1, 2009 Share Posted April 1, 2009 The smoke is from misfire, obviously. What are your PERDEL readings when warm? It probably should have gotten 8 injectors. Patching old trucks usually doesn't pay off. Good Luck! Quote Link to comment Share on other sites More sharing options...
Shlep Posted April 1, 2009 Share Posted April 1, 2009 Usually good advice but it's a hard sell to most customers, especially lately... it seems everyone wants to spend a little as possible and expect it to run like a brand new unit. Quote Link to comment Share on other sites More sharing options...
mchan68 Posted April 1, 2009 Share Posted April 1, 2009 Usually good advice but it's a hard sell to most customers, especially lately... it seems everyone wants to spend a little as possible and expect it to rum like a brand new unit.I can relate to that very well, believe me. Quote Link to comment Share on other sites More sharing options...
exmod110 Posted April 1, 2009 Share Posted April 1, 2009 Fix it but DON'T spend any money.... been there done that too Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted April 1, 2009 Share Posted April 1, 2009 I have been bitten by this myself. You replace two or three injectors that are obviously misfiring then the other five or six start to act up because they are nowhere near as good as the new injectors. Thing is, if you get an older truck with a ratty running engine that has a couple bad injectors, all eight were subjected to the same bad fuel, lack if maintenance or whatever abuse the customer has subjected it to. This is also a great time to run a compression test and do a base engine health check... before you install the injectors of couse. Quote Link to comment Share on other sites More sharing options...
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