Hard Starting Issue

[svtfiveoh]

I have a 2003 Ford Expedition with a 5.4 150k . I bought it about a year ago. Im having a hard start issue where it will crank about several times and then starts, Once it starts it sputters a bit and then smooths out. It runs perfect and idles perfect, I dont have any power issues and overall is a good vehicle. When I bought the Exp it had this issue, I have swapped out the Fuel Pump,Fuel Filter,Fuel tank Cap,MAF. I cleaned the Throttle body and also cleaned the IAC. The only thing is if I prime it a few times It crank once and start right up, and then sometimes I dont have to prime it and it will start right up with no issues. It stumps me because, Im not getting any codes and it drive perfect.....

Im wondering if new plugs would make a change even tho it runs fine besides the starting issue..

 

[smo0othride]

I have a 2003 Ford Expedition with a 5.4 150k . I bought it about a year ago. Im having a hard start issue where it will crank about several times and then starts, Once it starts it sputters a bit and then smooths out. It runs perfect and idles perfect, I dont have any power issues and overall is a good vehicle. When I bought the Exp it had this issue, I have swapped out the Fuel Pump,Fuel Filter,Fuel tank Cap,MAF. I cleaned the Throttle body and also cleaned the IAC. The only thing is if I prime it a few times It crank once and start right up, and then sometimes I dont have to prime it and it will start right up with no issues. It stumps me because, Im not getting any codes and it drive perfect.....

Im wondering if new plugs would make a change even tho it runs fine besides the starting issue..

What about the check valve or the fuel pump relay?

 

[svtfiveoh]

What about the check valve or the fuel pump relay?

Check valve ? where is that located? Would a check valve cause this starting issue? Also if the relay were defective would that cause the hard start issue???

 

[ELVATO]

Weird, it sounds like it would be the filter, but you've already swapped that out...

 

[svtfiveoh]

yeah I have swapped out the filter several times.. I mean other then a starting problem, It drives great and I get about 18-19 mpg on the highway...

 

[GAINMOB]

could be CoPs

 

[svtfiveoh]

could be CoPs

You think coils would do that ?

Im stumped, I guess I could swap the coils from my mustang since they have the same part #.. and see if they make a difference

 

[GAINMOB]

from what i've read from other people...misfiring may cause hard starts...i could be wrong...someone will get in and inform properly...

 

[svtfiveoh]

from what i've read from other people...misfiring may cause hard starts...i could be wrong...someone will get in and inform properly...

Hmm Not really getting a mis fire. Its wierd because all day today, Its started fine but I know its going to come back.

 

[raree]

I had this same problem. Took about 2000 miles til I started throwing a code. Ended up being COP #7. Swapped it. Problem solved. This is after I changed plugs and my EGR pressure sensor.