Engine/Transmission (1998.5 - 2002) What did I do

[JKaps]

Hope someone can help me, I installed a set of westach gauges (FP,EGT/BOOST combo) and a vulcan big line kit on a friends 99 stock CTD. Now he tells me he has to crank on it for about 2 or 3 minutes before it will start. I did the same thing to my truck with no troubles, any help or suggestions would be much appreciated

 

[Doug1810]

pressure ? is it stable ? might be suckin air

 

[SNiebaum]

sounds like there is air getting into the fuel system somewhere and he's losing prime.....

 

[LOtero]

Sounds like a lift pump but if you installed the fuel pressure gauge that should tell you right there. what kind of pressures are you seeing

 

[JKaps]

thanks for replying he says pressure is around 10psi, and I was thinking it was sucking air also but wouldn't I see a fuel leak somewhere if it was

 

[JKaps]

One more thing, with the big line kit can you put to much fuel to a possibility failing injector pump if it is failing and how can I test the injector pump. Thanks in advance for all the replies

 

[Doug1810]

If it was on the in comin side of the pump may just suck some air while suckin fuel . Not sure on the codes but if it ran good before the install i would say problem with install .

 

[RSimmons]

Will it fire better if you wait for the lift pump to time out on the initial prime before you crank the engine ? I noticed after having my ECM flashed with the latest software (for cold weather fast idle) the lift pump barely bumps (like 1 second) and then shuts off until the engine is cranked. Before the flash, the pump would run for about 5 seconds until cranked.



Too much lift pressure will cause some trucks to hard start. FASS included in their instructions that it sometimes (although rare) happens.

 

[DCreed]

fass also says your vp44 diaphram is on its way out if thats the case:{

 

[LowFly]

fass also says your vp44 diaphram is on its way out if thats the case:{

This can be true... but not always the case... as i have seen freshly rebuilt VP-44's have issue with hard starts as well. Full fuel pressure when cranking is a big cause for this hard start. DC's reflash or playing with a Smarty show to work rather well to reflash the ECM and prevent this issue.