1990 F-150 no start. Please help!
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Junior Member
Joined: Oct 2013
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1990 F-150 no start. Please help!
Hello,
Last year I picked up a 1990 F-150 XLT Lariat and am having an issue. We had a few days in a row of rain and when I went to start the truck nothing happened. No response from the power locks, windows, etc, and turning the key resulted in no response. Jumped the truck with my car and after 20 or so minutes got the truck to start up. Drove it around for 10-15 minutes hoping to recharge the battery, but when I parked, shut it down, and tried to start it again it was the same as before, turn the key and nothing happens. The battery was from fall of 2010, so I ran out and dropped a new Bosch in. Had some initial trouble, I assume because of corrosion on the positive clamp (only a small amount of corrosion though, so I was surprised), but after a little fiddling got it properly connected. Everything power works and when I try to start the truck the starter turns, but it just won't turn over. Doesn't sound like fuel is hitting it. I have two tanks and I tried with both just, but I would be surprised if both pumps went at once, so I'm thinking it's something else. If anyone has any tests/suggestions I would greatly appreciate it.
Last year I picked up a 1990 F-150 XLT Lariat and am having an issue. We had a few days in a row of rain and when I went to start the truck nothing happened. No response from the power locks, windows, etc, and turning the key resulted in no response. Jumped the truck with my car and after 20 or so minutes got the truck to start up. Drove it around for 10-15 minutes hoping to recharge the battery, but when I parked, shut it down, and tried to start it again it was the same as before, turn the key and nothing happens. The battery was from fall of 2010, so I ran out and dropped a new Bosch in. Had some initial trouble, I assume because of corrosion on the positive clamp (only a small amount of corrosion though, so I was surprised), but after a little fiddling got it properly connected. Everything power works and when I try to start the truck the starter turns, but it just won't turn over. Doesn't sound like fuel is hitting it. I have two tanks and I tried with both just, but I would be surprised if both pumps went at once, so I'm thinking it's something else. If anyone has any tests/suggestions I would greatly appreciate it.
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Thank you! Sorry for the reply delay.
I do hear the fuel pumps high pitched whine when I turn the key. Laid under the truck and had my friend toggle between the two tanks and heard each pump activate independently.
I have a manual but it's in storage and I need to grab it.
Tried to tackle the parasitic drain the other day. Put the multimeter on it to monitor the drain and pulled fuses in the cab of the truck hoping to find the source of the drain, but none of the fuses being pulled had any impact. If there are fuses under the hood I couldn't find them.
Some people are saying it's the alternator and others say distributer. Haven't done a spark and fuel test yet but I'm thinking that's what I should do next.
I do hear the fuel pumps high pitched whine when I turn the key. Laid under the truck and had my friend toggle between the two tanks and heard each pump activate independently.
I have a manual but it's in storage and I need to grab it.
Tried to tackle the parasitic drain the other day. Put the multimeter on it to monitor the drain and pulled fuses in the cab of the truck hoping to find the source of the drain, but none of the fuses being pulled had any impact. If there are fuses under the hood I couldn't find them.
Some people are saying it's the alternator and others say distributer. Haven't done a spark and fuel test yet but I'm thinking that's what I should do next.
Senior Member
Joined: Dec 2004
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From: Dover AFB DE / Harrisburg PA
Well in addition, check for excessive current draw on the fuse links that individually feed of the battery side of the fender mounted starter relay.
If the pumps run, they should be good electrically then. Pull the fuel filter loose and run a hose into a bucket for a flow test. Haynes manual also goes over the fuel pressure regulator troubleshooting on the back end of the fuel rails.
Adrianspeeder
If the pumps run, they should be good electrically then. Pull the fuel filter loose and run a hose into a bucket for a flow test. Haynes manual also goes over the fuel pressure regulator troubleshooting on the back end of the fuel rails.
Adrianspeeder