2001 Durango 4.7L - No Start
#1
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Ok hive mind...this is driving me nucking futs!
Background info: Aug 2018 ish...Wife was driving her 2001 Durango 4.7L and it over heated on her...and dropped #8 valve seat. Life and winter got in the way not to mention my 2000 Durango dropping #2 valve seat so she sat on the back burner until now. Fast forward to now, I replaced the heads with another set off a donor 4.7L engine, replaced timing chains and gears (used proper spec'ed N VIN coded timing set), new plugs (Champion copper, gapped .040) and new 4 hole injectors. Ended up replacing the slowly failing AC pump and water pump and now she is 100% back together...and will NOT start.
Replaced the cam shaft position sensor and the crankshaft position sensor off the donor motor. no fire....also tach not moving....re-installed cam shaft sensor (original) tach moves when cranking..still no fire
Verified that I have spark by using another coil over plug and old sparkplug and I have spark on all 8 cylinders with the test...also checked all 8 installed coil overs and they get spark (pulled coil overs put in known good plug cranked and see spark when grounded against metal...pulled and cleaned all plugs again..
When trying to crank it KINDA tries to run but never catches...but only when the key is "bumped" (momentarily twist to start then let go)
.
Won't fire on starting fluid
Am at a loss...what am I missing here?
Might be missing something I've done/checked...any ideas???
Thanks,
Steve
Background info: Aug 2018 ish...Wife was driving her 2001 Durango 4.7L and it over heated on her...and dropped #8 valve seat. Life and winter got in the way not to mention my 2000 Durango dropping #2 valve seat so she sat on the back burner until now. Fast forward to now, I replaced the heads with another set off a donor 4.7L engine, replaced timing chains and gears (used proper spec'ed N VIN coded timing set), new plugs (Champion copper, gapped .040) and new 4 hole injectors. Ended up replacing the slowly failing AC pump and water pump and now she is 100% back together...and will NOT start.
Replaced the cam shaft position sensor and the crankshaft position sensor off the donor motor. no fire....also tach not moving....re-installed cam shaft sensor (original) tach moves when cranking..still no fire
Verified that I have spark by using another coil over plug and old sparkplug and I have spark on all 8 cylinders with the test...also checked all 8 installed coil overs and they get spark (pulled coil overs put in known good plug cranked and see spark when grounded against metal...pulled and cleaned all plugs again..
When trying to crank it KINDA tries to run but never catches...but only when the key is "bumped" (momentarily twist to start then let go)
.
Won't fire on starting fluid
Am at a loss...what am I missing here?
Might be missing something I've done/checked...any ideas???
Thanks,
Steve
#2
#3
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Besides not firing, when engine cranking it sounds pretty normal...will do a compression test later today.
#5
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#7
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Could this have something to do with the factory security system in the Durango's ???
Steve
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#8
#9
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Update: Mopar branded Camshaft Position Sensor installed (Crankshaft Position Sensor due to arrive on the 10th). No real change. And I did try the lock and unlock sequence with the door key just to see and HeyYou was correct in that the security light should be on or blinking, it is not doing either so no change there. I swapped out the Crankshaft Position Sensor with one of my older ones and still no joy.
It will crank fine, and SOMETIMES ALMOST start but will not run. I re-checked grounds, cleaned and re-connected a couple of them...
Any other suggestions???
Steve
It will crank fine, and SOMETIMES ALMOST start but will not run. I re-checked grounds, cleaned and re-connected a couple of them...
Any other suggestions???
Steve