Truck shuts off after engine is warm!

Asked by Dewitt Jul 24, 2018 at 10:54 PM about the 2002 Dodge RAM 1500 SLT Plus Quad Cab 4WD

Question type: Maintenance & Repair

I put a 2000 jeep Grand Cherokee 4.7 engine on my
02 dodge ram 1500 ... " Used a 02 Durango intake
Manifold because It was new off my old Engine "
Now after installing engine, my truck will start up,
run for less then a min then shuts off. If I try
restarting it, it back fires, popping noise out the
exaust. If I wait hour to restart....it does fine for
less then a min...then shuts off! What could be the
issue? I replaced camshaft sensor & crankshaft
sensor & throttle sensor! I have no codes either!
Greatly appreciate some ideas of what could be
the issue.

4 Answers
4,790

jetjurnigan answered 6 years ago

It usually takes around 30-60 seconds for the engine to go into closed loop n the O2 sensors take over the job of regulating fuel flow to the injectors. The engine runs in a default mixture until then. Dijya replace ur O2 sensors when you replaced the engine. Try unplugging the upstream O2 n see if the engine will run then. BTW, the popping noise you describe can be caused by not enough fuel to sustain proper combustion. Fer sure fix???...no, but a good place to start.

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Dewitt answered 6 years ago

I haven't replaced the 02 sensors, I'll give that a try. Thanks Jet I'll let you know what happens.

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Dewitt answered 6 years ago

Messed with 02 sensors, didn't do nothing. Started to wiggle around on crank shaft sensor, started truck ran longer this time about 20 mins! Then....shut off..

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4,790

jetjurnigan answered 6 years ago

If that's the case, then maybe the sensor is loose in it's mount or you've got a bad connector/wire to the crank sensor or the sensor itself is bad. Make sure you replace it with a mopar one n not aftermarket. They're notorious for not liking aftermarket crank sensors.

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