If its the Carburetor system then Cleaning with carburetor
spray or solvent may help clean the dirt sticking to the unit problem... injected engines, a separate "cold start"
injector is used to spray additional fuel into the intake manifold
when a cold engine is first started. If this injector is not
working, the engine can be hard to start...
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The power control module sends signal to the fuel pump relay, it gets it's signal from the pick up coil in the distributor and the crankshaft position sensor. I'm having the same issues with my 94 Jeep Wrangler
Have fuel pressure checked when it starts to misfire/stall and driving down the road at normal speeds. Not unusual for fuel pump to run at proper pressure when cool, but lose pressure when warmed up. If it's only running bad when off accelerator and stopping or turning and runs down the highway good, remove and clean AIS/IAC motor. ( idle speed motor ) Once cleaned, if it runs better for a while then starts to act up again, replace it.
check the heater box door for your hot and cold selector, if it stays open no heat will come in. if ok then the heater core is plugged. you will have to flush it out or change it.
There is a temperature sensor on the engine. The computer uses the readout from it to feed more fuel during cold start up. If you replace the sensor it should be O.K..
A warm enigine takes more fuel pressure to start then a cold engine. Start by replacing the fuel filter. If that isn't the issue, then you might be looking at needing a new fuel pump.
plymouth voyager
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It is gas...the battery, alt, and starter are good
Does it have gasoline or diesel engine ?
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