'89 F250 Won't start. Can't figure out why.
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4th Gear
Joined: Nov 2022
Posts: 4
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'89 F250 Won't start. Can't figure out why.
Hi
My 1989 F250 5.8L EFI won't start and I can't figure out why. I'm hoping y'all can help me. I just finished replacing the engine with a rebuilt one. Checked the usual suspects such as fuel system and wiring and it all checks out. I can't seem to find anything wrong with it. The only thing I can think of is maybe the timing is severely off except that I set the base timing to the ford specs and it wont even catch. The only thing I have noticed out of the ordinary is what sounds like air poping from the throttle body when I turn it over. Both myself and my father have racked our brains for a few days and can't think of what we might have done wrong. Like I said, I checked the fuel system: both low and high pressure pumps, fuel tank switch, fuel filter, and all the lines. It's deffinitely getting fuel. I have also checked that the spark plug leads and the wiring harness are hooked up correctly, in good condition, and in working order. I just don't know. Any suggestions would be greatly apreciated.
Thanks.
My 1989 F250 5.8L EFI won't start and I can't figure out why. I'm hoping y'all can help me. I just finished replacing the engine with a rebuilt one. Checked the usual suspects such as fuel system and wiring and it all checks out. I can't seem to find anything wrong with it. The only thing I can think of is maybe the timing is severely off except that I set the base timing to the ford specs and it wont even catch. The only thing I have noticed out of the ordinary is what sounds like air poping from the throttle body when I turn it over. Both myself and my father have racked our brains for a few days and can't think of what we might have done wrong. Like I said, I checked the fuel system: both low and high pressure pumps, fuel tank switch, fuel filter, and all the lines. It's deffinitely getting fuel. I have also checked that the spark plug leads and the wiring harness are hooked up correctly, in good condition, and in working order. I just don't know. Any suggestions would be greatly apreciated.
Thanks.
Logistics Pro
Joined: Nov 2013
Posts: 3,928
Likes: 1,198
From: Mojave, Ca
You timed it at TDC on the COMPRESSION STROKE right? If you didn't pull the sparkplug or remove the valve cover to check for the compression stroke, then you have a 50:50 chance of being wrong.
Lead Driver
Joined: Oct 2016
Posts: 6,185
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From: Houston/Sugar Land
Just want to make sure you also removed the SPOUT when you set the base timing at 10 degrees BTDC.
Logistics Pro
Joined: Nov 2013
Posts: 3,928
Likes: 1,198
From: Mojave, Ca
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4th Gear
Joined: Nov 2022
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OK
Sorry for taking so long, came down with a cold and wasn't able to work on the truck. Once the new distributor came in I rechecked the timing on the engine and it was in fact 180 degrees out. After re-timing and double checking everything she started right up and is running strong. Thanks so much for the help!
Sorry for taking so long, came down with a cold and wasn't able to work on the truck. Once the new distributor came in I rechecked the timing on the engine and it was in fact 180 degrees out. After re-timing and double checking everything she started right up and is running strong. Thanks so much for the help!
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