Well it has hasn't it?

The issue that I just haven't been quite able justify in my mind is why my "hard-start" is worse when the engine is at operating temperature. Why does it crank up in the morning, but will barely crank up after I get to work? It finally left me stranded at the grocery store yesterday morning. I went back last nite and it still wouldn't crank up. But, I'll bet that when I go back to it today after work with a can of starting fluid, it'll crank right up. I'm getting worn out. - Curtis

 

lots of 03 with same prob including me. sounds like injectors from what i have been reading. i installed fass lp and only helped for 2 starts. no start again. some guys have changed out fuel filters and got a few more starts. i just ordered new injectors hopeing this will solve prob. hopefully no more ether for me. good luck

 

let us know how it goes, my 03 just takes a few cranks to get her going, it doesnt fire up like my dads 01 does though.

 

I want to know why peopel think the injectors are the reason for a no start, if when the truck is running, it runs perfect. How can that be? If the injector is leaking down, it is going to leak when running, and run poorly, ALL the time. Please explain to me what (everyone that thinks injectors) is your explanation for it?

 

My personal theory (and man have I been wrong in the past) is that under starting conditions, the CP3 isn't turning the RPM's that it does once the engine is running. So, during the starting, the CP3 is having to overcome the "leaking injector" amount plus enough to get the rail pressure up to about 3000psi or greater. Only then will the ECM send the voltage (or ground) to the injectors. Once the engine is cranked and running, the CP3 putting out substantial flow/pressure (up to 25,000psi or so). So the amount of "leaking fuel" doesn't have the net effect on the operation of the engine as it does during that critical starting period. I mean heck, if the CP3 were bad, I believe the engine would run bad. I tested the fuel pressure relief valve by plugging it...it wasn't leaking fuel even unplugged because I tried it. Now, I do have 1 other ghost in the back of my mind.......what if the ECM has a glitch and is not delivering what it needs to deliver to the injectors? However, I get no codes. I should have my Quadzilla Rail Pressure Monitor by tomorrow and will install it immediately to determine those pressures. Just my 2-cents, but I'm still trying to make more sense..........Chime in folks and let's get to the bottom of all this!! Thanks - Curtis

 

See, I would be more inclined to say that, as opposed to an injector

 

But I think you're more likely to get some form of error code. The ECM likes to toss numbers at you everytime the breeze changes.

 

After driving the shops 05 this last weekend at the Scheid Show....it had a similar issue once in the after noon. I have heard there is a reflash out for this...but being a 2nd gen owner...I'm not 100% sure on that. I’m sure its been covered somewhere.........

 

I posted this on another thread. I started from simple to hard. I had everything you could think of replaced and in the end it was all the injectors took a crap. Started with ether every time then ran great but shut it down and nothing would not start. Problem started in Dec. and as of right now its fixed after new injectors. Started with ECM, Pressure relief valve, intake Map sensor, FCA valve, Cross over tubes tightened, Return flow tests, LP flow and return tests, 3 different dealers. 2 1/2 hours after taken to last dealer he called ALL injectors were not within spec. Capped tested, pop tested and return flow tested. Did not pass any. Other dealers didnt IMO have quality techs. Dealer i took it to had a Master Diesel Tech 26 years exp. I had this in 6 times before for this with no luck. Other techs didnt even listen to me when I told them to look at the injectors. Said they did a flow test Nothing was found. Last dealer told me that when i shut down, the injectors would stick open and leak down while it sat. Then when i tried to start it, it wouldnt have enough fuel left in the pump or rail to build the pressure to fire the injector. (3500 psi) They idle at 5600 psi so if there is no fuel there is no way the injector can fire until it turns the pump to build pressure and get the fuel up there. Ether fires it fast enough to build the pressure so the injector fills up. It takes only one to leak down enough to cause the problem.

 

hoo yeah mopig. same probs. because of you i order injectors this am. fingers crossed tight.

 

Alot of times when the ECM itself is at fault, you won't get any fault codes.






"Last dealer told me that when i shut down, the injectors would stick open and leak down while it sat. Then when i tried to start it, it wouldnt have enough fuel left in the pump or rail to build the pressure to fire the injector. (3500 psi) They idle at 5600 psi so if there is no fuel there is no way the injector can fire until it turns the pump to build pressure and get the fuel up there."

Now that makes sense, even though it is still hard for me to imagine or believe. I do of course hope that it is the problem for you guys sake, as sound sto me ya'll are having one hell of a time. I am just grateful I am not having any start up problems with my '03, knock on wood!

 

SSminow.........heed all this, you get the benefit of our pains.........your day will come!!!

 

Hopefully I will postpone the agony by running Baldwin 5 micron fuel filters and two stroke mixture oil in the fuel.

MikeyB

 

Just for info to all. First thing done on my truck was a brand new ECM under the warrenty. Put in Aug. of last year. Reason being they couldnt get any info out of the pig tail, plus hard start issue started then so it took a year to get to were im now.

Dealer that did mine just plane told me that every part on a truck has a life span so are just shorter than others. 100000 plus miles on injectors is getting up there moving parts, o rings, wires and washers that can and will fail somtime or another. Its just a matter of time.