Truk won't start

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Apr 17, 2025 | 01:08 AM

juelad

Thread Starter

3rd Gear

Joined: Apr 2025

Posts: 3

Likes: 0

Truk won't start

Fuel pump went bad ,replaced fuel pump and filter
check fuel pressure when cold 40 psi, remove plugs and found faulty spark plugs replace all 8 plugs , truck doing exactly the same thing from the beginning cranks but wont start, has no fault codes, check also for spark and i am able to confirm that has gas and spark but won't start it just cranks and cranks and NO START, i am lost on the next step , no camshaft or crankshaft fault codes, need advice from someone that encounter this issue before thanks in advance.. PS went to my friend house started the truck putting in reverse die and it wouldn't start and still with all this work done won't start.

Apr 17, 2025 | 07:17 AM

Johnny Paycheck

Fleet Mechanic

Joined: Jul 2019

Posts: 1,316

Likes: 313

Quote:

remove plugs and found faulty spark plugs replace all 8 plugs

What do you mean by “faulty spark plugs”? Tell us exactly what you saw when you pulled them.

Also, your profile shows “1997 F-150”. That doesn’t really tell us about your truck at all. Which engine and transmission in it? What other work has been done to it?

Apr 17, 2025 | 09:43 AM

juelad

Thread Starter

3rd Gear

Joined: Apr 2025

Posts: 3

Likes: 0

Quote:

Originally Posted by Johnny Paycheck

f150 4.6 engine, original transmission, no other work has being done just new fuel pump new fuel filter and 8 new spark plugs and also new air filter.

Apr 17, 2025 | 12:02 PM

BareBonesXL

Fleet Mechanic

Joined: Jun 2023

Posts: 1,373

Likes: 383

From: WA

Quote:

Originally Posted by juelad

PS went to my friend house started the truck putting in reverse die and it wouldn't start

Fuel pump went bad ,replaced fuel pump
check fuel pressure when cold 40 psi,
cranks but wont start, has no fault codes,
confirm that has gas and spark
just cranks and cranks
no camshaft or crankshaft fault codes, and still with all this work done won't start.

I reordered your first post in the order that things might have happened.

How did you determine that the fuel pump was "bad"?
Did it start then die in reverse after the fuel pump was replaced? Or was the fuel pump replaced to try and fix the no-start condition?

Kind of looks like the fuel pump was fine and the no-start is caused by something else.

Retell your story in the order that things happened.

Apr 17, 2025 | 02:43 PM

01-7700

Cross-Country

Joined: Oct 2011

Posts: 65

Likes: 8

From: Maine

If the fuel and spark has been verified - it must be compression

Apr 17, 2025 | 04:39 PM

juelad

Thread Starter

3rd Gear

Joined: Apr 2025

Posts: 3

Likes: 0

Quote:

Originally Posted by BareBonesXL

went to friends house after that the truck started ok it run for a few minutes than die and it wouldn't start my neighbor dad has a towing business he brought the truck to my place , first i did check for fuel by pressing the fuel injection service valve no pressure found than check all fuses all good than check and swap fuel pump relay and install a fuel gauge at the service valve ( no fuel pressure, thanremove tank and replaced the pump along with the filter chek fuel pressure gauge and i got 40 psi, crank crank still no start , pull out spark plug and check condition (very old plugs and soak in gas , than I replaced all spark plugs and still wont start, pull one plug and founded again soak in gas not bad as the first time while the plug was out I check compressin on the cylinder a read 120 psi this morning remove the camshaft sensor and check condition looks ok after good cleaning put it back and still no start, re check all fuses ones again (all good) check with scanner again no faults found , truck still no start just cranks but no start and by the way worn out my old battery and also replaced.with a new battery.thank you in advance for your time and help.