94 Caravan 3.3 starts, then dies when hot

[bcdcoat]

What a great forum!

My wifes 1994 Grand Caravan 3.3 is driving me and all the local parts people nuts!

When it has been driven for 10 minutes or more and I shut it off, it will start and run if I try it right away. After shut off, if it sits for a few minutes, it will start right up but the RPM goes down slowly and it dies after a few seconds. At times it will cycle from idle to 300 or so RPM before it quits. Today I heard the fuel pump coming on right as the engine picked up on a few of these cycles.

No engine codes are present.

When it cools off for 30 minutes or more it starts right up and runs. As long as I don't shut it off, it runs. After shutting it off for a few minutes when warmed up is when this occurs.

I have been chasing a misfire in the mid RPM range under load for some time. I'm not sure if this is related, but thought I should throw it in there.

Today I pulled the fuel pump relay and it was very hot. I switched two of the relays but it made no difference in the problem.

Parts replaced are:
fuel pump and filter
fuel regulator
coil pack
wires
cam sensor
crank sensor
water temp sensor

Any ideas?

Thanks in advance for your help.

[acton mike]

check your fuel pump for both pressure and volume

I suspect you had best prime your wallet to buy another pump

[lugnut2]

my brother inlaw seems to be having the same problem with his 93 grand.
he was told to change the m.a.p. sensor or the crank sensor.
i think it is more likely an ignition problem. if i hear anything different i will post. good luck.





lugnut2

[bcdcoat]

Thanks for the replies. action mike, I have tried the pump, didn't help. I do appreciate your suggestion.

lugnut2, I just now drove it after finding and repairing a bad connection at the coil pack, and it did not change. I unplugged the MAP sensor and it ran. I'll try a new MAP sensor in the morning.

If that fixes it I'll post back so maybe your brother in law can get some relief. This thing has been a real pain, and my wife has MY car until her van is fixed!!!!!

Thanks for the help.

[bcdcoat]

MAP sensor took care of it. My wife has her beloved van, I have my car back. Thanks.

[lugnut2]

:ylsuper: :cheers: glad i could help it fixed my brother inlaws van to.
lugnut2