2002 Dodge Durango

GANDERSON32

MEMBER
2002 DODGE DURANGO
V8
4WD
AUTOMATIC
140,000 MILES

The original 4.7 engine threw a connecting rod, so, I purchased an engine, after hearing it run, from a wrecked Jeep Grand Cherokee, all the harness plugs to the sensors were identical, I had to replace 3 ignition coils, as we broke them, trying to get them off to change the spark plugs. I replaced the valve cover gaskets, on this 4.7 along with the intake manifold gasket, as we had to remove it during the engine installation process, to better gain access to the top bell housing-to engine bolts. This engine will spin over and over, with the smell of gasoline, so, I'm aware the fuel pump is working, but will not start. Won't even hit like it's trying to start. Any ideas?

5 Replies

JDL

MECHANIC
16,098 POSTS

Did you visually check for spark at the plugs, engine cranking? Can you communicate with computer? I can't tell if your security system might be causing an issue?

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Thursday, November 4th, 2010 AT 1:43 PM

GANDERSON32

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9 POSTS

I did check for spark, using the old method of putting a good known spark plug into the boot/coil, grounding it to the engine, and spinning it over, no spark. The only security system I know of is thru the FOB, for locking and unlocking the doors, when engaged/disengaged, the horn will blow once. Is there a process to disengage the security system?

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Friday, November 5th, 2010 AT 1:17 PM

JDL

MECHANIC
16,098 POSTS

The dark green wire with orange tracer is primary voltage for the coil, engine cranking, is it hot, use a voltage tester. Primary voltage won't hurt you, secondary voltage will bite.

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Friday, November 5th, 2010 AT 1:32 PM

GANDERSON32

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9 POSTS

I checked the fire to all 8 coils, using the green wire with orange stripe, the voltage is good on all of them. I pulled the plugs, thinking they were gas fouled, however they're dry. Whenever the engine is spinning over, I can smell gas, and I can hear the fuel pump run. Thinking the anti theft had something to do with it, I went into the black plug under the drivers kick panel, and grounded out the anti theft wire, to no avail. Short of loading it on my trailer and hauling to my local dealership, to let them scan the electronics with their DRB, I'm at my wit's end. Any other suggestions?

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Wednesday, November 10th, 2010 AT 8:26 AM

JDL

MECHANIC
16,098 POSTS

Does the fuel pressure regulator have a vacuum line? Check the line, shouldn't be any gas in it. If you smell gas, do you think it is trying to flood?