hard or no start with a p1670

Dzchey21 · Dec 13, 2014

Runs perfect warm no codes I am going to check duty cycle today hopefully.

co04cobra · Dec 13, 2014

So it still has cold no start and hard start? And this a different set of injectors?

lincolnlocker · Dec 13, 2014

so the only issue is that it sometimes doesnt start worth a poo when cold only?

live life full throttle

mandkole · Dec 13, 2014

almost sounds like hpop bleed back now-- hard start then its cranky for the first few minutes?

Dzchey21 · Dec 13, 2014

mandkole said:
almost sounds like hpop bleed back now-- hard start then its cranky for the first few minutes?

yeah exactly

Dzchey21 · Dec 13, 2014

co04cobra said:
So it still has cold no start and hard start? And this a different set of injectors?

yeah its not even that cold sometimes when it wont start.

lincolnlocker said:
so the only issue is that it sometimes doesnt start worth a poo when cold only?

live life full throttle

50 or colder it can have the problem

It will start at 10 degrees not plugged in no problem as long as it doesnt sit for more than 24 hours

lincolnlocker · Dec 13, 2014

Dzchey21 said:
yeah its not even that cold sometimes when it wont start.

50 or colder it can have the problem

It will start at 10 degrees not plugged in no problem as long as it doesnt sit for more than 24 hours

WTF! and that is the only issue? hqve we covered battery power and alternator voltage? im at work so no time to go back and read right now.

live life full throttle

mandkole · Dec 13, 2014

I forgot one, lets throw a sticking IPR on the barbie also. Check cranking pressure build up also. When the OBS did this, it would behave the same way after a few days of sitting, then run fine once it was cleared up. Only did it after a few days of sitting.

Dzchey21 · Dec 14, 2014

Yea batteries are less than a year old they charge fine with a newer alternator.

I also just put a new gear reducted starter on it a few weeks ago as well

Cranking rpm is 250 only real concern is cranking draw is 380 amps which still seems high

lincolnlocker · Dec 14, 2014

Dzchey21 said:
Yea batteries are less than a year old they charge fine with a newer alternator.

I also just put a new gear reducted starter on it a few weeks ago as well

Cranking rpm is 250 only real concern is cranking draw is 380 amps which still seems high

i could see that hindering startup some but should run just fine after the alternator catches back up... it will draw a lot when the glow plugs are running while cranking....

live life full throttle

Dzchey21 · Dec 14, 2014

glow plugs draw about 100 amps and the heating grid (which i wired to come on all the time with the glow plugs) draws another 50 amps, i thought maybe the extra intake temp would help but it hasn't.

The original starter was non gear reducted and was drawing almost 500 amps, so i figured that maybe it was sucking so much power from the IDM that it wouldnt allow it to fire the injectors correctly. So it was obviously not good but i didnt think 380 amps was right either. Although it cranks super fast and sounds much better than it did before.

lincolnlocker · Dec 14, 2014

Dzchey21 said:
glow plugs draw about 100 amps and the heating grid (which i wired to come on all the time with the glow plugs) draws another 50 amps, i thought maybe the extra intake temp would help but it hasn't.

The original starter was non gear reducted and was drawing almost 500 amps, so i figured that maybe it was sucking so much power from the IDM that it wouldnt allow it to fire the injectors correctly. So it was obviously not good but i didnt think 380 amps was right either. Although it cranks super fast and sounds much better than it did before.

i cut the intake heaters off all the 7.3s i work on and unhook the relay.. not needed... coldest i started my dually was -27 in hastings Minnesota without being plugged in.. thats when i knew that delo 15-40 would be staying in my truck cuz even synthetic rotella wouldnt fire when that cold..

live life full throttle

Dzchey21 · Dec 18, 2014

truck has been sitting since sunday. I did a hot run on it and then parked it. Oil RES is full of oil. Truck will not start. I checked fuel pressure before i started it and it came up to 40 psi right away so its not draining back... Its almost got to be injectors. Its smoking to beat hell and trying to run but it just wont pick up and run.

webb06 · Dec 18, 2014

Dzchey21 said:
truck has been sitting since sunday. I did a hot run on it and then parked it. Oil RES is full of oil. Truck will not start. I checked fuel pressure before i started it and it came up to 40 psi right away so its not draining back... Its almost got to be injectors. Its smoking to beat hell and trying to run but it just wont pick up and run.

One thing you could try is to pull a valve cover and watch the spill port while someone cranks it and see if oil is coming out. If not then the injectors need replaced.

co04cobra · Dec 18, 2014

What is the ICP and DC when it is hot, but no start?

Dzchey21 · Dec 18, 2014

webb06 said:
One thing you could try is to pull a valve cover and watch the spill port while someone cranks it and see if oil is coming out. If not then the injectors need replaced.

I was going to try that, its too ***in cold for me to want to do that in my driveway tho LOL

co04cobra said:
What is the ICP and DC when it is hot, but no start?

I havent checked ICP right now but in the past when it was doing the same thing I had 2000 psi icp at like 63 DC IIRC cranking cold.

I havent done a WOT run when its hot to see what the numbers are

webb06 · Dec 18, 2014

Dzchey21 said:
I was going to try that, its too ***in cold for me to want to do that in my driveway tho LOL

I havent checked ICP right now but in the past when it was doing the same thing I had 2000 psi icp at like 63 DC IIRC cranking cold.

I havent done a WOT run when its hot to see what the numbers are

I wouldn't work outside either haha

Dzchey21 · Dec 18, 2014

Thats what sucks. Keep it in the shop, it will probably start, put it outside i can duplicate the symptom but have no desire to do anything untill i can get it started and get it inside.

Frustrating to say the least.