in dire need of getting my explorer going, i have a big family n no wheels but our tr

[tex1313]

i have a 93 explorer with the 4.0l motor and i recently rebuilt the whole motor, i did everything but mess with the time at all because im not the best with timing. Well i got the motor back in and now i cant get it started. Its getting spark and fuel so i have absolutely no idea what i di wrong can ne body have any helpful ideas???? any and all ideas are welcome because i need to get our vehicle back on the road with the quickness

 

[Mbrooks420]

What did you replace? I can't see a way to do a full rebuild, and keep the motor in time. With spark, fuel and compression, it should start. That leads to the spark not being in time.

 

[Dopler174]

^^Agreed^^

 

[Trebor]

maybe you hooked up the spark plug wires in the wrong order

 

[Slick Fan]

How extensive was this rebuild? Did you put the engine on a stand & completely blow it apart, cleaning & machining everything, replacing pistons, bearings, gaskets, etc?
If so, the cam timing could be off by a tooth or two. Pull a plug & check compression...if it's low (like below 100 or so), then that's probably the culprit.

Fuel...you can be getting fuel to the rail, but if your injectors aren't firing for whatever reason, it won't start. Pull a plug & see if it's wet...it should be wet in this situation.

Spark...if the above two ideas check out, double/triple check your plug wire routing. Keep in mind which direction the engine rotates as you go through the firing order.

Hope that helps.

 

[tex1313]

well i pulled the engine out and did a complete rebuild minus messing with the toming at all i pulled everything off the engine and replaced it, all except for the crank and cam and timing gears and chains, i left those intact, because i was trying to avoid this problem. is it true that you have to let the lifters sit in oil for a few days that way they get primed before u put them back in??????????????????? cause if so thats one thing i didn't do

 

[tex1313]

by the way thanks alot for all of yalls replies i really appreciate them

 

[Slick Fan]

is it true that you have to let the lifters sit in oil for a few days that way they get primed before u put them back in??????????????????? cause if so thats one thing i didn't do

With new lifters, it's a good idea to submerge them in a can of oil for a while, some books I've read even say to manually pump them a few times each with a push rod while they're submerged.
I usually soak them, but have only pumped them on two engines...didn't notice much of a difference on start up. Regardless, the engine should still fire, but the lifters would probably be noisy for a bit.

The main thing you want to do is to goop the cam lobes & lifters with assembly lube, so there's plenty of lubrication on initial start up. Same with engine bearings, of course.

 

[Russ in CT]

In addition to what others have said regarding spark timing, etc, one other thing I can suggest is trying some starting fluid. If there is an issue getting fuel, or even an issue with inadequate spark, you might get it to fire with the starting fluid.

This could at least tell you you've got the spark & valve timing correct (it ain't gonna kick over at all if the timing is off, even with the starting fluid).

If the starting fluid gets it going, but won't stay running, you're not getting fuel (or at least not enough fuel/fuel pressure)