I changed the fuel filter the other day on my 04 Cobra. I ran the car then pulled the fuel pump fuse and let the car die to relieve some of the fuel pressure. When I got done I cycled the key a few times to build some pressure in the lines. When I started the car there was thick white smoke coming from the exhaust and had a real strong raw gas smell. The service engine light came on, too. It never ran hot. I cut the car off and unhooked the battery for a few minutes. When I hooked it back up the car ran fine. Anybody have a clue why it done this? I'm thinking I cycled the key to many times between off and on and it built to much pressure in the lines causing it to run really rich. Everybody says that it's a black smoke if running rich, though. Did this hurt the engine????
Thick white smoke and strong gas smell???
- Thread starter Moose04
- Start date
You think it hurt the car?
I think pulling fuse and run car caused sel
where you live. ..did it freeze. .
White smoke could be a few things
where you live. ..did it freeze. .
White smoke could be a few things
Did you check the codes? I highly doubt you hurt the motor. Barely any load on the engine at idle.
It was cold, but didn't freeze. Is it possible I cycled the key to many times making it run really rich. It's was really thick smoke and was still in the tips after shutting the car off. It wasn't a mist. The car ran fine after I disconnected the battery then hooked it back up. The service engine light didn't come on after that either.
I don't have a code reader, I need one though
I put the fuel filter in the right direction. Always make double sure I do. I changed them all the time in my old 01 GT I use to have. This is the first time doing it on my Cobra. I was just worried that I lean it out or cause detonation, but I guess from the gas smell that it wasn't lean, but rich
I don't see that cycling the key a few times is going to make it rich. It's not like it's dumping raw fuel into the cylinders every time the key is cycled.
Moose0It was cold said:
Don't it pressurize the system when you turn the key from off to the on position. So if it does then every time you cycle the key, without starting the car, don't it just keep building pressure until you do start it?
I'm not 100% sure how it all works, maybe someone else will answer. However I did have a leaky injector. If the car sat for awhile, fuel would leak onto the piston. Then once I'd start the car I would get a little smoke from the unburnt fuel.
Yeah i always thought white smoke was coolant. I doubt it is in your situation though since you just changed the fuel filter.
I didn't have time to drive it the other day. I'll have to take it for a drive this weekend. All my fluides seems fine. First thing I done was check the oil and it was fine, not milky. Coolant seemed fine, too, no oil. I'll drive this weekend and update.
That's what I thought, too. Can't be that cause all I messed with is the fuel pump fuse and fuel filter. It ran fine before I pulled the fuse. I won't be pulling that fuse again.
All you were doing is priming the pumps.
No way to over pressurize. No fuel is delivered until there is a crank situation.
The couple seconds the pumps are on in the key on position is a timed event meant to prime lines/rails only.
No way to over pressurize. No fuel is delivered until there is a crank situation.
The couple seconds the pumps are on in the key on position is a timed event meant to prime lines/rails only.
This, your key cycles did nothing to hurt it.
Since you just messed with the fuel system and THEN the problem started, the fuel system must be the culprit. I haven't done this in my Terminator, but to relieve pressure for an install in my Shelby, per Ford's install instructions, with the car OFF, I pulled the fuel pump relay and then tried to start the car (crank it). This relieved pressure in the rail. Once the install was done, I then simply started the car normally (not cycling the key).
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