1996 Dodge Caravan runs for 5 secs then stops

NETWORKSPR

MEMBER
1996 DODGE CARAVAN
6 CYL
FWD
AUTOMATIC
130,000 MILES

Intermittent ongoing problem that dealer has not been able to fix. Car will run fine one minute - cannot start the next. Guages and tach stop working, no dash lights. Engine cranks and starts ok. Runs 5 seconds then stops. Happens mostly when is a hot day. Leave until weather is cooler and ssometime starts ok. Never happens when take to the dealer. Now, does not start. Any help appreciated. Other symptom - driver electonic lock does not work, radio front speakers intermittent. Have replaced lock assembly - still a problem; have not solved the speaker problem.

3 Replies

SERVICE WRITER

MECHANIC
9,123 POSTS

Intermittants are tough. It sounds like a BCM/PCM or wiring problem. IT may just need a software update (flash)

IT is good that it isn't starting right now. This is the time to diagnose.
The first two things to check are for spark and fuel.

Spray some carb cleaner or similiar into the throttle body and crank it. Does it start?

USe a spark tester to see if spark it happening.

IF you are not comfortable with testing on your own and have faith in the dealer, then they should be able to diagnose it.

When it runs for a few seconds and quits, it is more so common of a pcm or bcm failure. The fuel system gets shut down.

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Monday, September 21st, 2020 AT 1:06 PM

NETWORKSPR

MEMBER
2 POSTS

The car runs for 5-10 secs only when I insert the key and the fuel pump gets up to pressure. If I try to start a 2nd time without removing the key the engine just cranks over - so one of the modules or both are faulty. This could also explain the door lock and radio problem. Would it also explain the dash problems. How can I diagnose which module is faulty and what do you think the cost is to repair/replace? Thanks again for your help.

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Monday, September 21st, 2020 AT 1:06 PM

SERVICE WRITER

MECHANIC
9,123 POSTS

First place I would start is to check for codes. It may show a communication error.

Before we get too far, keep in mind that if you decide to get a used one, you will have to get both the PCM and BCM. IF yours has anti-theft the other ones will also have to have that, or vica-versa.

BAsed on symptoms, I would be leaning at the BCM due to the door lock etc. Problems.

I would think a reman BCM is going to run a few hundred dollars anyways. A parts store or dealer can give you that number as it varies.

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Monday, September 21st, 2020 AT 1:06 PM