99 won't start - Ranger-Forums - The Ultimate Ford Ranger Resource


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  #1  
Old 09-23-2014
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99 won't start

My 99 Ranger shut down going down the road. I replaced the cam sensor and still won't run. I have spark - fuel. I tested both wire going to the cam sensor but no power. I did this while turning the motor over. Any ideas?

2.5 4 cyl.
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Old 09-24-2014
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It's still not running today. But it's my sons so he can't get in trouble. Could this be the ignition?
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Old 09-24-2014
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Cam sensor(CPS) can't cause a no start

Crank(CKP) sensor can
But it would have no fuel or spark if that was the issue, that's why the no start, without CKP sensor signal computer doesn't know you are trying to start the engine.

'99 could have PATS(passive anti-theft) system.
But again no fuel or spark if that was the problem.

The big 3 for a running engine are:
Spark, at the right time
Fuel, in the right mix with air
Compression

Crank engine
Then remove a spark plug, check it's tip for fuel, it should be wet.
Now crank engine again and listen for the distinctive "Whoosh" of the compression stroke.
Or if you have a compression gauge use it, you need above 100psi to start cold engine, 2.5l should be 160+psi with good battery cranking engine fast.

If it is low or you have a lope when cranking engine then timing belt stretched and has skipped, and that is why the no start.

Read here: https://www.ranger-forums.com/genera...9/#post2076363
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Old 09-25-2014
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So the belt had broke. Now I have it apart - have new belt. Is there a place on here that explains how to align the crank and cam?
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Old 09-25-2014
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The belt was broke. - Thanks - Can you tell me how to align everything?
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Old 09-25-2014
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Old 09-26-2014
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I fixed it by putting on the new belt. It would not start so I took the belt off and turned the crank 360 and it fired right up. Thanks for the help.
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Old 09-26-2014
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Quote:
Originally Posted by gerneml View Post
I fixed it by putting on the new belt. It would not start so I took the belt off and turned the crank 360 and it fired right up. Thanks for the help.
Glad you got it running, good work.


But turning the crank 360deg(1 full revolution) wouldn't make a difference.
The crank only has #1 TDC, it doesn't matter if #1 piston is on the compression stroke or exhaust stroke, piston is just at the top(top dead center, TDC)
The cam gear is what determines which stroke the piston is on, the piston/crank doesn't care.
And if using a distributor the oil pump gear sets #1 firing.
That is why these two gears are twice the size of the Crank gear, crank rotates 2 full turns for each 1 full turn of cam/oil gears.

May be the CKP(crank position) sensor was not quite right after first assembly.
If CKP sensor doesn't send a pulse there would be no spark and no fuel, so no start.
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