Slow to start

[Jamesvinar]

After work today ill do a fuel pressure test. I changed the plugs when i put the MC coils in. The cam or crank sensor would probably prevent the car from starting period wouldnt it? Not this kinda of slow stumbling start, brother said that maybe a sticking injector. Would make a little sense since it seems like i use a quarter tank every time i start it

Could it be the starter and its solenoid? When i first got the crown vic it didnt start on the first try until i got a new solenoid

 

[Jamesvinar]

So if the station mixed up the gas and i got 87 or 89 on accident would the symptoms be the same?

 

[Lvnmarks]

I'd lean towards fuel pressure as well. The octain raining won't cause this issue per say. The knock sensors will pick that up and retard the timing to compensate.

Starter only turns the engine over to build vacuum / compression, this still sounds like a fuel problem. Go rent an actual fuel pressure gauge and let us know what the numbers are when priming/starting and running.

 

[Jamesvinar]

Did the test. At idle i had 28ish PSI. Primed 0PSI. Shutoff drops like a rock to 0PSI

 

[driller]

Did the test. At idle i had 28ish PSI. Primed 0PSI. Shutoff drops like a rock to 0PSI

Bingo.

 

[Jamesvinar]

So.... what do you recommend.... i hear the Walbro 255lph is pretty good, dont know if its good for stock or a 98

 

[tixer]

Unless you're adding big power, I'd either go OEM, or that SVT Focus one everyone always talks about..

Great write up on that one, here.

http://www.lincolnsofdistinction.or...hp?29196-Gen-II-SVT-Focus-Fuel-Pump-Installed

 

[Jamesvinar]

Unless you're adding big power, I'd either go OEM, or that SVT Focus one everyone always talks about..

Great write up on that one, here.

http://www.lincolnsofdistinction.or...hp?29196-Gen-II-SVT-Focus-Fuel-Pump-Installed

Thank you. Hopefully this is the actual problem.

My brother told me about a sort of anti backflow valve on it which would be the reason it's not holding pressure, I'm not completely sure about how the whole pump system works so would that be within the pump itself or further up? Can't seem to find a motorcraft one for sale too :/

Weird how it always worked after i did the plugs too

 

[germansheperd]

Unless you're adding big power, I'd either go OEM, or that SVT Focus one everyone always talks about..

Great write up on that one, here.

http://www.lincolnsofdistinction.or...hp?29196-Gen-II-SVT-Focus-Fuel-Pump-Installed

This right here

 

[Jamesvinar]

Im a little bit slower than the rest...

Orderes the pump, will install right when it gets here.

 

[Jamesvinar]

So I decided to try cycling the key about 7-8 times and then quickly starting it, helped alot.

 

[Jamesvinar]

New ones in. It's quicker to start and stronger but still takes some time. Gonna give it a week or so.

 

[Lvnmarks]

What's your compression?

 

[Jamesvinar]

Don't know for sure but probably not good, car was a rental and had some bad owners, never had this problem before though. Looks like I'm still lacking pressure at the rail at prime and when I turn off.

 

[Jamesvinar]

Now have pressure. Maybe 3 or 4 seconds to start which is a big improvement

 

[tixer]

That still seems like twice as long as it should be.. Maybe follow that fuel line from front to back on the car. See if it's been crushed/damaged/etc?

 

[Jamesvinar]

It all looks good. Im wondering if the pressure holds or the injector leaks it all in.

 

[Jamesvinar]

Doesnt appear to hold pressure
Update: seafoam in the tank appears to have fixed it...

Overall ive just stopped a few problems ahead of me for a couple hundred dollars when the real fix was a 6$ can of addetive...

 

[driller]

So it holds fuel pressure now?

 

[Jamesvinar]

For a good amount of time