start up

[RWestbrook]

Bought a 2003 3500 4x2slt auto yesterday. Does not start up as quick as my 99 3500. With the new diesel ,should it turn more befor it starts?

 

[Fireman]

When I first got mine it seemed to take a little longer to start also. In 2-3 weeks it won't bother you any more, I promise.



Fireman

 

[yogibear]

I've noticed my oil pressure comes up almost immeadiatly, instead of the 4 or 5 sec. delay on my 00.



Larry

 

[Casey Balvert]

Mine seemed to fire up just a tad slower than my 97. As Fireman said, after a couple of weeks you don't even notice the difference.



Cheers, Casey

 

[Big MAK]

I also noticed a slightly longer time to crank it up. Doesn't bother me; IMO it's due to the high pressure commin rail system needing a second or two longer to come up to operating range. I was used to just tapping the key in the old one; now I hold it a second.

 

[chessie-system]

Howdy,

I think the engine is doing 1 complete revolution before it fires. Probably so the computer can figure out whats going with all the sensors. My 95' would fire on whatever cylinder was next in line

Jeff

 

[lschultz]

Heres another one that takes longer to crank compared to my 2000.

 

[Greg Boardman-RIP]

mine too

 

[RWestbrook]

Exhaust Fumes

Exhaust fumes are comming through the vents when the truck is stopped and idling. Happens when heat or outside vent is on. Does not happen when ac is running. Does not happen when truck is moving.



2003 slt cummings. quad cad long bed

 

[Evan A. Beck]

HEUI, HPCR, and other types of unit injection systems all crank longer than a PLN (pump-line-nozzle) system. There are several reasons for this. With a HEUI or HPCR system, a cam and/or crank referece signal must be seen before the ECM will operate the injectors. Rememer guys, there is no static timing on a HEUI or HPCR injected engine. Injection timing is determined by using input from various sensors... Such as CMP, CKP, MAP, IAT, etc...



Bascially, the ECM has to know "where" the engine is before it can start. Make sense?



On a similar note, with PowerStrokes (HEUI), two things must happen before the engine will start. Injection control pressure (ICP) must reach 500 psi, and a strong cam position signal must be seen. Then the ECM will give the IDM the command to run the injectors. Thats why PSDs often crank quite a bit before they start.



Todays diesels are using a lot of electronics, and the new ISBe is no exception to this rule.

 

[JWerkheiser]

Evan gets the award for the most acronyms used in a post. My head is still spinning.

 

[Evan A. Beck]

*LOL* heh, I guess I should explain each one...



HEUI--Hydraulically actuated Electronic Unit Injector

HPCR--High Pressure Common Rail

PLN--Pump Line Nozzle

ECM--Engine Control Module

CMP--Camshaft Position

CKP--Crankshaft Position

MAP--Manifold Absolute Pressure

IAT--Intake Air Temperature

ICP--Injection Control Pressure

IDM--Injector Drive Module

 

[Prairie Dog]

Hey we may be on to something here! - Posts with subtitles!

 

[Evan A. Beck]

 

[mberry]

Hi there...

I drove an '03 HO yestersday and started about 4 just to see if they were consistent. They were. They all took a little longer to start than my '02.



p. s.

If I can get financed, I'll have an '03 HO in an instant. I was really impressed with it.