Hard first start
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Freshman User
Joined: Jun 2019
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Hard first start
I have a 93 f150 xlt,5.0 auto trans. I have to use starter fluid to get it going first thing in the morning but after that it's fine for the rest of the day. Runs great and starts fine until next morning I've had the truck for a week. The previous owner threw tons of new parts at it. He's been dealing with it for a couple of years. What's weird is the fuel pump runs for several minutes and never shuts off until I shut the key off. It should only run for a few seconds then shut off. It's definitely trying to start in a lean mode. The spark plugs are dry and doesn't smell off gas after I try to start it. The only thing the guy hasn't replaced is the ecm. Could this be the problem? Any help would be appreciated
The Southernmost Mod
Joined: Dec 2004
Posts: 6,902
Likes: 20
From: Caracas, Venezuela
Usually these issues are related to the fuel delivery system. The pump running so long might indicate the fuel pressure isn't building fast enough. I'm currently experiencing the same issue with my Bronco, in a more acute form (no-start). I already cleaned the injectors and replaced the fuel filter, up next i'll blow the fuel lines with my air compressor to see if there is anything obstructing them, then clean the fuel tank and replace the fuel pump. The old one which was a Motorcraft stopped working after just one year, hence why I decided to give a through cleaning to the whole system.
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Joined: Jun 2019
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All of that has been done to this truck. The old guy I bought it from spent a ton of money on this thing. I'm thinking it's the ecm because of its a cold start issue only. This truck is immaculate in every way. What angers me is that his mechanic replaced the gauge cluster that odometer reads 204,000 miles. The owner swears it only has under 100,000 miles on it. No way to prove it though
Tuned
Joined: Jul 2002
Posts: 479
Likes: 12
From: Louisiana
Usually if the fuel pump does not shut off in a few seconds it is the computer. Pull the computer. open the case and check for bubble top or leaking capacitors. Replace with fresh caps of the same value or have a friend do it if they can solder. This is what mine did a few years ago and I repaired the computer myself. I even replaced the fuel pump to no avail.
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Freshman User
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That's awesome. That gives me hope of fixing mine. Luckily I have a friend here at work that fixes electronics for a hobby. He says he has the capacitors and he'll fix it for free. Now all I have to do is remove it when I get home from work tonight. I can't wait to see if this fixes it. Thank you brother
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Tuned
Joined: Jul 2002
Posts: 479
Likes: 12
From: Louisiana
That's awesome. That gives me hope of fixing mine. Luckily I have a friend here at work that fixes electronics for a hobby. He says he has the capacitors and he'll fix it for free. Now all I have to do is remove it when I get home from work tonight. I can't wait to see if this fixes it. Thank you brother
Tuned
Joined: Jul 2002
Posts: 479
Likes: 12
From: Louisiana
To bad Radio shacks are not as prevalent as in the older days. Any local computer shops near by. They may have scrap boards to rob parts off of
I order from Mouser electronics https://www.mouser.com/ It will take a few days to come in , if you can wait
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Freshman User
Joined: Jun 2019
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We have a few repair shops here but they won't sell parts to the public. I miss radio shack. Best buy advertises they have them in stock but they said they don't have any. Thanks for the link. I guess I've got no choice but to wait. Lol
