Allpar Forums banner

1 - 5 of 5 Posts

·
Registered
Joined
·
2 Posts
Discussion Starter #1
Our 1998 Grand Caravan 3.8 AWD intermittently almost shuts down. It throws codes p0201 thru p0206 and p0351, 0352, 0353. Then it will clear up and run fine for a while (long enough to lure me into a test drive.)
i dont have a meter that can read live data but I do have a fluke 88. I have checked batt connections, and inspected all of the connectors in the harness that i have found so far. While the engine stumbles the cruise control light comes on on the gauge cluster and the MIL does not light until after it stops stumbling. I'm willing to take this to a good smart tech but i don't know who this is yet. we live between Lynnwood and Everett, WA.
i've read some things about clocksprings and ignition switches but niether gave the same symptoms i'm getting. i need to fix this quick because my wife is starting to like driving my dodge cummins truck! Or, two truck family?....hmmm

Any suggestions? Thanks.
 

·
Super Moderator
Joined
·
21,353 Posts
Welcome to Allpar. I doubt that it is related to the ignition switch or clockspring. I would more suspect underhood connections or wiring problems. Possibly one or two wiring connections causing all your injector/coil switching problems. Maybe an intermediate connector or PCM-related connector?
You may have to have it acting up in order to find it. Try a wire/connector terminal 'wiggle' test while it's idling? Check all PCM powers and grounds?
 

·
Registered
Joined
·
67 Posts
check easy stuff first. With a test light connect the lead to battery negative and have someone crank the engine while you test for spark at the coil and end of the wires. I believe the wiring for the injectors and coil run right over the top of the exhaust manifold. make sure they havent fallen and melted on this
 

·
Registered
Joined
·
2 Posts
Discussion Starter #4
Thanks to both of the replies about my problem. I did all of the above suggestions that I had not already done and repeated a few to be sure. Then I found a friend that had a Chrysler scanner and he found more codes that my cheap scanner would not read. The most telling was a code for the auto shutdown relay. So, we meticulously traced and tested several wires, bypassed the ASD and it still barely ran. then he tried a relay test of the ASD and the Fuel pump relays. The FP relay cycled as asked but the ASD freaked out we the signal was given to closed the relay. Next he noticed that all of the DTCs would clear themselves and then reappear when we would restart the engine. He suggested that I test the ign sw and if that passed then replace the PCM. The switched worked fine so I bought a used PCM with matching numbers and the car has run perfectly for two days now. I've never experienced a PCM failure before but I've heard of many people changing them and not fixing their problem so I was skeptical but, for no reason. Thanks again to all who helped. And thanks to my patient wife. There's a Rubicon in her future.
 

·
Super Moderator
Joined
·
21,353 Posts
Yes, I have been burned before by deciding prematurely that the PCM was bad. There is no direct test for a PCM and all supporting electronics have to be ruled out first.
There are 'possible causes' lists for each of the fault codes and it is good to see which possible causes they share in common to solve a problem first. In the 'trouble tree'-type diagnostic methods and procedures, the PCM is always the last house on the block.
I'm glad that you solved it.
 
1 - 5 of 5 Posts
Top