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Post by Shadrock on Jul 20, 2013 16:37:37 GMT -6
Hey guys, just swapped my engine over in Big Bird. 2001/ auto/ 4.0L
I'm to the point I'm trying to crank it. It's turning over, but doesn't sound like it's firing. Normally I do the routine check for fire/fuel/air. This one has a coil pack, so I can't just pull a plug and look for fire or stick a timing light on a spark plug wire... I don't recall being able to hear the fuel pump priming like my mustangs or Z71, so I'm not sure how to tell if it's getting fuel.
I don't think the plugs on the harness can be connected wrong. I "think" they're keyed to only fit specific sensors. I haven't spent a lot of time troubleshooting it, but I am open to suggestions... Start with the dumb things that's easy to forget, b/c I'm good at doing that.
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Post by Somebody on Jul 20, 2013 16:39:47 GMT -6
There is a valve on the fuel rail.. press it and check for pressure after you turn the key on..
That's where I would start
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Post by Daniel on Jul 20, 2013 16:45:38 GMT -6
check the crank sensor to unless you changed it out
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Post by mike on Jul 20, 2013 16:58:09 GMT -6
check the crank sensor to unless you changed it out And check that you got the crank sensor in the correct position, Don't remember exactly how it goes but just went thru it on the swap I just did.
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Post by Daniel on Jul 20, 2013 19:32:17 GMT -6
yea there's a cranksensor spacing tab you can from the dealer.
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Post by Shadrock on Jul 21, 2013 6:43:04 GMT -6
check the crank sensor to unless you changed it out I never took the crank sensor out of the tranny, it should be good unless it has to be adjusted for a different engine...
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Post by Shadrock on Jul 21, 2013 6:44:14 GMT -6
There is a valve on the fuel rail.. press it and check for pressure after you turn the key on.. That's where I would start You're correct, it's not priming... No pressure in the fuel rail.
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Post by Shadrock on Jul 21, 2013 6:49:21 GMT -6
I said it was something stupid... Since it wasn't priming, I traced the fuel injector harness back and saw that the plug wasn't fully pushed in. She fired right up. This heat in the shop will make you delirious and miss the simple things.
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Post by Shadrock on Jul 21, 2013 6:51:09 GMT -6
And thx for the help guys...
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Post by Somebody on Jul 21, 2013 8:30:04 GMT -6
Glad ya got it fixed! That plug is famous for coming loose.. Mine did it a few times before my axle swap...
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Post by Shadrock on Jul 21, 2013 8:44:48 GMT -6
Glad ya got it fixed! That plug is famous for coming loose.. Mine did it a few times before my axle swap... Well, its my own dumb fault, I have the hardest time getting some of the plugs loose without breaking the clips. So I left the plug loose just in case I needed to rearrange the wiring. Once I verified that it wasn't getting fuel from your suggestion, I was able to track it down pretty quickly.
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Post by Daniel on Jul 21, 2013 10:25:49 GMT -6
good deal! that's my luck to, don't feel bad. lol I'm getting ready to swap carburetors on the jeep.. easy 20 minutes at the most swap.. Ha! never that easy with me. something is always bound to happen and turn my day to crap lol
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Post by Shadrock on Jul 22, 2013 19:10:25 GMT -6
Got a new problem... It would turn over and crank fine and then I started having problems with the starter clicking. Started happening when I replaced the bent dipstick tube. Which is where the ground strap from the starter connects to the block. I took it off cleaned the block & dipstick tube mount for a good connection. Cleaned the battery cables. Double checked the grounds on the firewall. Re plugged the starter, swapped battery. The dash kinda acts haywire when I turn on the key and the starter just clicks or does nothing, sounds like a bad ground.
Where is all the grounds in the engine compartment? Maybe I'm missing one... One ground cable comes from the starter to the block, the other ground cable goes from the starter goes to the fire wall. There's two ground points on the firewall.
One of those days, I just had to walk away and do something else.
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Post by Daniel on Jul 22, 2013 19:28:20 GMT -6
try putting jumper cables on it. a low battery will cause dash light to go crazy . it could be coincidental.
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Post by Shadrock on Jul 22, 2013 19:47:02 GMT -6
try putting jumper cables on it. a low battery will cause dash light to go crazy . it could be coincidental. The charger showed it to be full, when it turned it turned over strong. I tried my battery off my other truck just in case, but had the same results..
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