Lb7 Duramax Cranks But Wont StartChevrolet Repair 2001 duramax cranks but wont srart. If not I would try that I am doing a lb7 to LLY swap and had to relearn it. blk smoke lb7 said: no it does not,i had a problem with it when i installed the engine,it would crank then but wouldnt start,i found 2 injectors stuck open and it wouldnt generate enough presure to make the bosh injection computer to work,changed the injectors and it fired rite up,but this engine was running when it died this time. Book 'em, Danno! Tried to start the truck. LB7 injector replacement performed at an independent shop typically calls for 10-12 hours worth of labor and roughly $3,500. Also, no bio after November. Perhaps the most devastating of all Duramax failures is a broken factory crankshaft. Crank no start lb7 duramax - YouTube 0:00 / 3:19 Crank no start lb7 duramax Ron’s repair 25 subscribers Subscribe 11K views 1 year ago Truck was running fine then stopped working, checked the. LB7: Crank but no start. My 2002 GMC Duramax LB7 won't start after I shut. Have a full charged battery turn key try to start let go of the key it will return to the on position leave it for 10 minutes turn it off for 10 seconds do this 3x then it should marry to it and start hope this works for you yep, and it is learned B Bradgrantham59 Member Mar 6, 2021 38 0 6 Prescott Arizona Mar 7, 2021 #4 Is it working now?. 6L LML crank no start (air leak)">2013 Chevy Duramax 6. check fuel leaks around the fuel filter Sometime they are leaks not really visible on the inlett er outlett tube on top of the filter mount Had this problem last year. 4) Confirm actual versus desired rail pressure, even under crank no start conditions. LB7 injector replacement performed at an independent shop typically calls for 10-12 hours worth of labor and roughly $3,500. It sounds like it wants to start but doesnt. Originally pulling the codes, it showed P0341 (cam pos sensor performace), and later showed crank pos sensor codes and glow plug codes, but only after numerous attempts to start. I have a 2003 lb7 duramax with 202k on it. No major… What is the fuel rail pressure actual and desired while cranking?. It sounds like it wants to start but doesnt. Engine will crank but not start and it doesn't seem like it's getting any fuel when cranking, no smoke out tailpipe. check the filter to make sure it is tight. Do smell diesel around the truck. blk smoke lb7 said: no it does not,i had a problem with it when i installed the engine,it would crank then but wouldnt start,i found 2 injectors stuck open and it wouldnt generate enough presure to make the bosh injection computer to work,changed the injectors and it fired rite up,but this engine was running when it died this time. Start inspecting your fuel lines from filter head to CP3. no solution yet Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP Ask an Expert Car Questions Chevrolet Repair 2001 duramax cranks but wont srart. Crank no start lb7 duramax - YouTube 0:00 / 3:19 Crank no start lb7 duramax Ron’s repair 25 subscribers Subscribe 11K views 1 year ago Truck was running fine then stopped working, checked the. Went to start it the other day, ran for 30 seconds and then died. 6L LML crank no start (air leak). LB7 Duramax crank no start diagnostic help? : r/Duramax">2002 LB7 Duramax crank no start diagnostic help? : r/Duramax. I looked at some forums and some said it could be the fuel pressure regulator. If nothing, try a 1 second spray, but no more. pulled engine apart and injectors and cp3 looked to be new. If you have too much suction, after changing the fuel filter, the restriction could also be the sock in the tank. Look for any kinks, dry rot, cracked lines etc. Motor: LB7 with 230-240k miles Now Brand NEW Color: blue Mods: Banks cold air, 150ghp FASS, +100hp/40% industrial injectors, 3" monster flow exhaust, solid steel front and rear bumper made by Trails end, 64mm stealth IHI turbo, Down pipe from ATP Use: daily driver, vehicle towing and stuck vehicle removal. Motor: LB7 with 230-240k miles Now Brand NEW Color: blue Mods: Banks cold air, 150ghp FASS, +100hp/40% industrial injectors, 3" monster flow exhaust, solid steel front and rear bumper made by Trails end, 64mm stealth IHI turbo, Down pipe from ATP Use: daily driver, vehicle towing and stuck vehicle removal. You are going to have to use a scanner and watch the actual fuel rail pressure while you crank. truck cranks but doesnt start. 01-04 LB7 2004 Duramax WONT START! clif May 28, 2011 C clif Clif Messages 18 Reaction score 0 Location Wynyard Saskatchewan May 28, 2011 #1 I have a 2004 duramax that i reciently changed the fuel line that goes from my fuel sending unit to my steel feed line. Have a full charged battery turn key try to start let go of the key it will return to the on position leave it for 10 minutes turn it off for 10 seconds do this 3x then it should marry to it and start hope this works for you. blk smoke lb7 said: no it does not,i had a problem with it when i installed the engine,it would crank then but wouldnt start,i found 2 injectors stuck open and it wouldnt. Try this pull all the glow plugs pull the inj fueses so the injectors dont fire,have some one on each side of the truck and watch the glow plug holes for mist any misting are stuck open and killing your cranking psi. 160545 miles Posted by Dan Boone on Jun 09, 2014 1 Answer Mike Thomas Expert 43 Answers Take vacuum hose off pressure regulator. Book 'em, Danno! Tried to start the truck. Truck ran fantastic before and didn’t. The bulk of most no-start conditions on an LB7 have to do with the fuel system, some with the starting system, and occasionally there will be trouble caused by other sensors like the camshaft position sensor, crankshaft position sensor, fuel injection control module, a faulty ECM, and more. Now engine wont start anymore. GM Tech (Cam) is online now Continue Related Chevy Questions Crank not start. Cranks but won't start. I figured it was a fuel issue, so i changed the primer pump and fuel filter and still nothing. Fatal Flaws of the Duramax—and How to Fix Them">5 Fatal Flaws of the Duramax—and How to Fix Them. I had this happen to me is why i say it. My buddies lb7 had this exact problem once it was started it would run fine, it obviously lacked some power though. blk smoke lb7 said: If it started and then stopped im betting its not the filter head im betting you have 1 or more injectors stuck open. Crank no start lb7 duramax - YouTube 0:00 / 3:19 Crank no start lb7 duramax Ron's repair 25 subscribers Subscribe 11K views 1 year ago Truck was running fine then stopped working, checked the. fuel filter and priming it… Answered in 5 minutes by: GM Tech (Cam), Chevy Technician 32,814. According to the scanner, it has no problems making fuel pressure- desired fp at 6k and actual builds to over 6k rapidly. What could have happened is the fuel filter head leaked and got air in the fuel. 01 lb7 will crank but not start! won't even start with ether!. duramax LML air leak on the fuel system. So hopefully this will help you guys out. 5-2005 (LLY) Closed / Archived Marketplace Ads 6. Crank no start lb7 duramax - YouTube 0:00 / 3:19 Crank no start lb7 duramax Ron’s repair 25 subscribers Subscribe 11K views 1 year ago Truck was running. Then take the air filter out, and with your helper, have them crank the engine. At -15*F it's more like cold butter. I bought a 2000 mile motor that sat for 9 years with injectors in it and i tried using them and this is what i found. 3) Check for air in fuel system, install clears lines before and after the filter housing to check for air in the lines. The problem is i will crank it and it will only build up 200psi. 5L Diesel Engine Duramax First Generation: 2001-2004 (LB7) Duramax Second Generation: 2004. 5 second spray into the housing, again only when cranking. The problem is i will crank it and it will only build up 200psi in the rails. came back out, started the truck like normal and it ran for about 30 sec. If not I would try that I am doing a lb7 to LLY swap and had to relearn it. The bulk of most no-start conditions on an LB7 have to do with the fuel system, some with the starting system, and occasionally there will be trouble caused by. Lb7 crank no start good fuel pressure no codes. Bleed the system with the primer bulb & bleed all air out. 02 Duramax crank no start?. There are no engine codes either. I also replaced my fuel filter housing because the truck was loosing prime. 2001 duramax cranks but wont start, already tried bleeding the …. the engine was a junkyard engine pulled from a running wrecked vehicle. Show more Chevy / GMC Truck: Crank. No codes, i have swapped the FCA, Rail pressure sensor and. The problem is i will crank it and it will only build up 200psi. Not only does this mean game-over for the engine, but it results in a truck that’s down for weeks. My 2003 Duramax cranks but wont start. No Start or Hard Start 1) Excessive fuel restriction, check or change fuel filter 2) Use vacuum gauge, check the suction, you should have no more than 5 inches Hg at WOT (wide open throttle) or 7-8 inches Hg under load. I would check fuel lines and fuel head for leaks. Crank no start lb7 duramax - YouTube 0:00 / 3:19 Crank no start lb7 duramax Ron’s repair 25 subscribers Subscribe 11K views 1 year ago Truck was running fine then stopped. Couldn’t get it to start at all since then. No major…">Lb7 crank no start good fuel pressure no codes. com">03 Chevy Duramax won't start. No Start or Hard Start 1) Excessive fuel restriction, check or change fuel filter 2) Use vacuum gauge, check the suction, you should have no more than 5 inches Hg at WOT (wide open throttle) or 7-8 inches Hg under load. your getting air in the fuel it shouldn't get soft again. It needs to get up to 20 MPa (or maybe just 10?) before it will be able to start. I have a 01 lb7 dmax cranks over plenty fast but won't start. Try this pull all the glow plugs pull the inj fueses so the injectors dont fire,have some one on each side of the truck and watch the glow plug holes for mist any misting are stuck open and killing your cranking psi. Your problem can be an air leak from the tank to the fuel filter housing, leaking fuel filter housing,fuel pressure relief valve,or FICM (fuel injector control module). Take Fuel Filter Off With A Strap Wrench,replace Fuel Filter Add Diesel To Filter Before Putting Back On, It Will Help You Prime. If I give it a whiff of ether and start it up pressure jumps up to 3900-4000 PSI or higher when revved up a bit. will cause crank no start. once The Filter Is Back On Push Primer 3--4 Times Now Open Nylon Until Fuel Slowly Pushes The Air Out Of The Line Tighten SCREW Repeat As. Lb7 engine cranks but will not start. I have a GM service manual that shows the steps for a CRANK-NO START symptom but I am going to have to find a good scan tool to use for some of them and learn the locations of some of the sensors that it mentions. These engine do not like ether, and any amount is bad, so only do as I have instructed. 31826 Views 13 Replies 5 Participants Last post by davester, Nov 17, 2017. Try this pull all the glow plugs pull the inj fueses so the injectors dont fire,have some one on each side of the truck and watch the glow plug holes for mist any misting are stuck open and killing your cranking psi. Fuel rail pressure shows ~200 PSI at rest, ~305 PSI when cranking. went to grocery store and was inside for about 30 mins. No codes are showing on my BASIC scan tool!. now it will crank but not start. If not I would try that I am doing a lb7 to LLY swap and had to relearn it. Crank no start lb7 duramax - YouTube 0:00 / 3:19 Crank no start lb7 duramax Ron’s repair 25 subscribers Subscribe 11K views 1 year ago Truck was running fine then stopped working, checked the. Its a free test and you can eliminate a couple things by doing the test. Went to start it the other day, ran for 30 seconds and then died. It's just plain too cold to run it. See more Reply Save Like Meshanic. The truck has been sitting for a week due to it not being my primary driver. Try this pull all the glow plugs pull the inj fueses so the injectors dont fire,have some one on each side of the truck and watch the glow plug holes for mist any misting are stuck open and killing your cranking psi. your getting air in the fuel it shouldn't get soft again. 01 Duramax wont start !!! HELP. 2002 lb7 duramax, picked it up off KSL (craigslist for Utah) with this crank no start issue, sent it on to the dealership, they replaced the pcm and fuse blo. duramax cranks but wont start, already tried bleeding ">2001 duramax cranks but wont start, already tried bleeding. Check all the fuses in the under hood electrical center with a test light. I have a 2003 lb7 duramax with 202k on it. duramax LML air leak on the fuel system. Bio takes on the consistency of warm butter at. Have a full charged battery turn key try to start let go of the key it will return to the on position. Truck ran fantastic before and didn’t smoke at all. If there is fuel in the places above maybe the cp3 is too weak to properly fuel the injectors enough to crank the truck. LB7: Crank but no start. Discussion Starter · 40 m ago. Inspect your engine harness for any rubbed through wire insulation, broken wire, corrosion, loose connections, etc. your getting air in the fuel it shouldn't get soft again. My 2002 GMC Duramax LB7 won't start after I shut it off Already replaced the fuel regulator which the code came up Still have to crank and crank before it will start. It does some really funky things at that temp, but it starts. 2002 LB7 Duramax crank no start diagnostic help? : r/Duramax. blk smoke lb7 said: no it does not,i had a problem with it when i installed the engine,it would crank then but wouldnt start,i found 2 injectors stuck open and it wouldnt generate enough presure to make the bosh injection computer to work,changed the injectors and it fired rite up,but this engine was running when it died this time. Also, no bio after November. 2003 Chevy Duramax cranks over but will not start. I modified the wire harness and i did accidentally cut one wire but i fixed that. Got scanner on it this afternoon - crank and cam signals are both showing as present when cranking, not showing any missed sensor pulses when running. blk smoke lb7 said: If it started and then stopped im betting its not the filter head im betting you have 1 or more injectors stuck open. It is also possible the fuel gelled up. I have a 01 lb7 dmax cranks over plenty fast but won't start. 3) Check for air in fuel system, install clears lines before and after the filter housing to check for air in the lines. fuel filter and priming it Answered in 5 minutes by: GM Tech (Cam), Chevy Technician 32,814 Satisfied Customers GM Grand Master Technician 2007. If I disable the glow plugs and give it a very light whiff of ether it will fire right up and stay running as long as I hold the pedal enough to keep it above ~1300 RPMs. Id bottle test and see if you have a ton of fuel returning to the tank. Well about two moths ago I had to GMC Ask an Expert Car Questions GMC Questions ★★★★★ Lb7 crank no start good fuel pressure no codes. fuel level is more than a 1/4 tank so that shouldn't be an issue. Lb7 crank no start good fuel pressure no codes. 5) If the above check good, then it comes down the following. dont Take Out The Black Nylon Screw To The Top Of Filter Pump. Primed it and it still didn’t start. went to grocery store and was inside for about 30 mins. 6 will crank but not start. once The Filter Is Back On Push Primer 3--4 Times Now Open Nylon Until Fuel Slowly Pushes The Air Out Of The Line Tighten SCREW Repeat As Needed. 5 Fatal Flaws of the Duramax—and How to Fix Them. will cause crank no start. Crank no start lb7 duramax. Couldn’t get it to start at all since then. lb7 duramax cranks but wont start. I have a 01 lb7 dmax cranks over plenty fast but won't start. 2001 duramax cranks but wont start, already tried bleeding the fuel filter and priming it. The engine will crank but will not start. blk smoke lb7 said: If it started and then stopped im betting its not the filter head im betting you have 1 or more injectors stuck open. LB7 Cranks but wont start. No matter where you take the truck for the job or whoever performs the work, make sure you install brand-new, genuine Bosch injectors. Doesn't seem like it's running rough or still getting air out. Replace any that are in questionable shape. Apr 10, 2021 · LB7 CRANKS BUT NO START Thread starter autospecialty; Start date Feb 28 , 2021 … If the ECM can’t see FICM power – probably won’t start. any suggestions or help? thanks 6" RCD Kit 18" KMC Hoss wheels 35" Toyo Open Country M/T's. ">LB7: Started up then died. Bio takes on the consistency of warm butter at around 0*F. He had to use stater. I know for certain that it is not a glow plug issue, see this.