BJ74 CRANK BUT NO START (but has fuel?)

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Tanner H

Tanner H

10 Year
Joined
Nov 3, 2015
Threads
76
Messages
1,101
Location
Corona, CA
My bj74 is being a little bitch again so I'm adding another thread to the pile of "crank but no starts".

-BJ74 13bt with a ton of miles. A month ago I replaceed all the fuel lines from tank to pump. new filter, new hand pump. So I'm no stranger when it comes to fighting this thing to fire up. since then been daily driving it. Has been starting every morning in half a second without issues. Saturday I actually drove it on the freeway for a couple hours doing 60-65.

Sunday went to drive it and just cranks with no start. Not even a hint of firing up.

Here is what i've done in the last few days to try and solve the issue to no avail:
-replaced fuel filter (i did notice my 1 month old filter was pretty dirty/cloudy inside).
-bled the filter. no bubbles. steady stream.
-hand primer firms up (I have a new primer being delivered today to try out in case some miracle that changes things)
-I live in southern california and the weather is 70-75 degrees.
-disconnected shut off valve line to make sure it wasnt giving me an issue
-removed air filter to make sure it wasnt giving me an issue

My thought process is that if the primer firms up, then I'm getting fuel to the injectors. So does that leave compression being the villain here? I would assume even with a bad head gasket or bad rings that it should at least cough and stumble? Compression test on these motors seems to be difficult as there are no glow plugs and I cant seem to locate the SST for the injector hole.
 
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Hi
Oh man, that thing is really giving you hard times.
I would agree: If the priming pump gets firm, there should be sufficient fuel near the engine to at least get some cough out of it.
... if the fuel actual makes it through the injection pump.
... and if some air is around,
... and if there is compression
... and if the timing is right.
Why should the engine lose compression or get out of timing if it was just doing normal the other day?
I'd start with the IP: Crack an injector line, crank it and see whether there is fuel.
Good Luck Ralf
 
@Felde I almost simply tagged you in my original post, but I knew you'd chime in with your expertise.

-Timing should be perfect since I have not touched anything related to that.
-compression could be the issue since I knew this motor was very tired when i purchased the truck. I'm thinking maybe the highway drive finally made it kick the bucket? Cant imagine it having zero compression on all 4 cylinders. I would assume it would at least stumble and die or idle very rough and then die.


-I forgot to mention I have not cracked the injector hard lines yet since I was doing everyhing solo. Might have one of my kids turn the key while I crack open each to confirm fuel.
 
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Thank you for the flowers. But my actual expertise is quite limited. I'm basically going by logics.
There also is the engine electric / engine switch-off / fuel cut solenoid thing that might obstruct fuel feed. But I'm not knowing much about that though.
Checking at the injector is simply coming from the other side of matters to narrow it down.
Maybe worth posting the issue in the diesel forum?
Good Luck Ralf
 
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