7.3 odd start?

[kylerf150]

do you have any smoking issues when it romps up and down?my truck will do it sometimes when its really cold -0 or i dont let the glow plugs warm all the way.if its somewhat cold and you get some white smoke i would look into checking your glow plugs.Do you know how to do that?

[AgentAustin]

Same thing happened to me when I was coasting down a grade. It was running about 2,500 RPM, then just dropped for no reason to about 500 for a few seconds, and went back up. Hasn't had anything happen since, and has never donee it before. I was thinking it shifted but speed didn't change, and load didn't...

[daveyburt]

thanks!
i'll be doing a gp check when i get my engine scanner. But, the previous owner did them (replaced) 40k ago. the first time it romped, it was fairly warm out 60deg +.
The last time it romped it did puff a bit while it was romping and immediately went away.
The thinner oil is a good idea except it was kinda warm when it did it at first...but, thanks!

sounds like a few folks have this symptom....anyone get it squared away. if so, what was the issue?

[kylerf150]

a scanner won't tell you if your glow plugs are bad. If you have a test light you can test them take the alligator clamp part of the light and put it to the pos+ post on your batt. then take the uvc plug apart on your valve cover its right in the center facing the valley of the motor and put you test light seperately on the left two pins then on the right two pins inside of the plug on the valve cover gasket. be careful that you only touch one pin and a time if you touch two it wont do any harm but you won't be gettting a accurate reading if you get light at all four pins all your plugs work then check the other side and if you get light at all four of those pins they are all in good working order. you can also check the gp module which is a different test. let me know how that goes for you and if you have any ? just pm me.I hope this helps you. when are you getting your scanner and what kind did you order i use my diablo sport which i really like because i can also see all of the engine parameters which with most others you can only see the codes i hope you dont have a po1316 which is the idm i would look into you glow plugs and glow plug module for now and when you get your scanner check your codes and write them all down then clear them and run your truck for a while and check again also i have used cheap code readers before and they didn't see anything for codes but with a better more quality scanner it saw codes on the same truck.good luck

[daveyburt]

thanks man!! that there is good info!!!

i planned on getting the Auto Enginuity scanner from PHP shich, from what I understand will perform a glow plug continuity test, injector buzz test and a slew of other diags as well as live logging and monitoring....so. I'm assuming this will do the trick. -also, obviously, this will let me check for latched codes to see if anything is stored without the SES light showing

the last time i was heading for the valve covers, i couldn't, for the life of me, unplug that connector....so, yea, the connections could be a little grungy. -or i'm just an idiot (which is more often than not, the problem).


thank you for the info and i may just dig into it again and see if I can get that harness plug separated and do some probing.

i'll post any results to help any others who may have a rompy rig.


thanks!!!

[chrismjennings]

The video is the sound of your glow plugs not all getting up too temp, So your engine is slowly but surely getting all your glow plugs up too temp. It's basically relying on four or five glow plugs to start the engine, and then one by one they will all start to fire. Check your glow plugs???

[jesilvas]

The reason for the romping is because of the thick oil, the dead head high pressure oil rails, and the injector firing sequence.
The #8 injector fires right after the #6 injector. Because the oil is thick, it flows a lot slower than normal. Once #6 fires, the HPOP has to push very thick oil ALL the way to the back of the rail to replenish the oil lost in firing the #6 cylinder. Since it's think, it can't get there in time to fire #8 so you get either very little detonation or none at all since no fuel gets injected.
The HPO Xover solved this completely for me.

[kylerf150]

did you ever get your scanner? If so what you did you find out and how do you like it?

[daveyburt]

i didn't.
i've been meaning to.

after the holiday and i'll report back